McIntosh | MXA70 | Owner`s manual | McIntosh MXA70 Owner`s manual

McIntosh MXA70 Owner`s manual
McIntosh Laboratory, Inc.
2 Chambers Street Binghamton, New York
MXA70
Integrated Audio System
Owner’s Manual
13903-2699 Phone: 607-723-3512
www.mcintoshlabs.com
The lightning flash with arrowhead, within an equilateral
triangle, is intended to alert the user to the presence of
uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute
a risk of electric shock to persons.
WARNING - TO REDUCE RISK
OF FIRE OR ELECTRICAL
SHOCK, DO NOT EXPOSE
THIS EQUIPMENT TO RAIN OR
MOISTURE.
IMPORTANT SAFETY
INSTRUCTIONS!
PLEASE READ THEM BEFORE
OPERATING THIS EQUIPMENT.
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings. Install
in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as
radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug
has two blades with one wider than the other.
A grounding type plug has two blades and a
2
The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in the
literature accompanying the appliance.
NO USER-SERVICEABLE PARTS
INSIDE. REFER SERVICING TO
QUALIFIED PERSONNEL.
third grounding prong. The wide blade or the
third prong are provided for your safety. If
the provided plug does not fit into your outlet,
consult an electrician for replacement of the
obsolete outlet.
10. Protect the power cord from being walked on
or pinched particularly at plugs, convenience
receptacles, and the point where they exit
from the apparatus.
11. Only use attachments/accessories specified by
the manufacturer.
12. Use only with the cart, stand, tripod, bracket,
or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use
caution when moving the cart/
apparatus combination to avoid
injury from tip-over.
13. Unplug this apparatus during lightning storms
or when unused for long periods of time.
14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus
has been damaged in any way, such as power-
To prevent the risk of electric
shock, do not remove cover or
back. No user-serviceable parts
inside.
supply cord or plug is damaged, liquid has
been spilled or objects have fallen into the
apparatus, the apparatus has been exposed to
rain or moisture, does not operate normally, or
has been dropped.
15. Do not expose this equipment to dripping or
splashing and ensure that no objects filled
with liquids, such as vases, are placed on the
equipment.
16. To completely disconnect this equipment from
the a.c. mains, disconnect the power supply
cord plug from the a.c. receptacle.
17. The mains plug of the power supply cord shall
remain readily operable.
18. Do not expose batteries to excessive heat such
as sunshine, fire or the like.
19. Connect mains power supply cord only to a
mains socket outlet with a protective earthing
connection.
Thank You
Your decision to own this McIntosh MXA70 Integrated Audio System ranks you at the very top among
discriminating music listeners. You now have the best.
The McIntosh dedication to precision performance
assures many years of musical enjoyment.
Please take a short time to read the information in
this manual. We want you to be as familiar as possible with all the features and functions of your new
McIntosh.
Please Take A Moment
The serial number, purchase date and McIntosh Dealer
name are important to you for possible insurance
claim or future service. The spaces below have been
provided for you to record that information:
Serial Number:________________________________
Purchase Date:________________________________
Dealer Name:_________________________________
Technical Assistance
If at any time you have questions about your McIntosh
product, contact your McIntosh Dealer who is familiar
with your McIntosh equipment and any other brands
that may be part of your system. If you or your Dealer
wish additional help concerning a suspected problem,
you can receive technical assistance for all McIntosh
products at:
McIntosh Laboratory, Inc.
2 Chambers Street
Binghamton, New York 13903
Phone: 607-723-3512
Fax: 607-724-0549
Copyright 2014 © by McIntosh Laboratory, Inc.
Customer Service
If it is determined that your McIntosh product is in
need of repair, you can return it to your Dealer. You
can also return it to the McIntosh Laboratory Service
Department. For assistance on factory repair return
procedure, contact the McIntosh Service Department
at:
McIntosh Laboratory, Inc.
2 Chambers Street
Binghamton, New York 13903
Phone: 607-723-3515
Fax: 607-723-1917
Table of Contents
Safety Instructions................................................................2
Thank You and Please Take a Moment................................3
Technical Assistance and Customer Service........................ 3
Table of Contents..................................................................3
General Information.............................................................4
Connector and Cable Information........................................4
Introduction..........................................................................5
Performance Features...........................................................5
Dimensions...........................................................................6
Installation............................................................................7
Connections:
Rear Panel Connections........................................................ 8
Connecting Components and
Optional Loudspeakers............................................... 10-11
System Thru Connections.................................................. 12
External Power Amplifier Connections............................. 13
Remote Control and Front Panel:
Remote Control Push-buttons............................................ 14
How to use the Remote Control.......................................... 15
Front Panel Displays, Controls,
Push-button and Jack.......................................................... 16
Setup Mode: con’t
Input Renaming........................................................... 18
Speaker Size................................................................ 19
Subwoofer Mode.......................................................... 19
Power Mode................................................................. 19
Remote Control............................................................ 20
Operation:
How to Operate the MXA70.............................................. 21
Power On/Off.............................................................. 21
Source Selection.......................................................... 21
Volume Control........................................................... 21
Trim Functions:
Trim Functions Introduction.............................. 21
Bass Boost.......................................................... 21
Balance............................................................... 22
Trim Level.......................................................... 23
Mono/Stereo Mode............................................ 22
Meter Backlight................................................. 23
Display............................................................... 23
Digital Audio (Display), Mute........................... 23
Headphone Jack, Headphone HXDTM......................... 24
Output Control............................................................. 24
Profile Mode...........................................................24-26
Power Output Meters and Power Guard...................... 26
Using a Separate Power Amplifier.............................. 26
Optical and Coaxial Digital Inputs............................. 27
USB Input Operation and Driver Installation............. 27
Installing the Software........................................... 27-28
USB Audio Driver Operation and Reset
of Microprocessors.................................................. 29
Resetting the MXA70 to default settings.................... 27
Specifications............................................................. 30
Packing Instructions.................................................. 31
Setup Mode:
How to Operate the Setup Mode........................................ 17
Default Settings........................................................... 17
Firmware Version........................................................ 18
3
General Information, Connector and Cable Information
Connector and Cable Information
General Information
1. For additional connection information, refer to the
owner’s manual(s) for any component(s) connected
to the MXA70.
2. Apply AC Power to the MXA70 and other McIntosh Component(s) only after all the system components are connected together. Failure to do so may
cause a malfunction of system operations as the
Microprocessor’s Circuitry inside the components
is active when AC Power is applied.
3. The MXA70 includes an Auto Off Power Save
Feature and the default setting is enabled. For
additional information including how to disable it,
refer to page 19.
4. When Power Amplifier Protection Circuitry of
the MXA70 has activated, the Front Panel Power
Guard LEDs are illuminated continuously and the
sound will be muted.
5. If the Power Transformer has overheated due to
improper ventilation and/or high ambient operating temperature, AC Power is removed from the
MXA70. Normal operation will resume when the
operating temperature is in a safe range again.
6. The Remote Control supplied with the MXA70 is
also capable of operating other McIntosh Components. These other components may include
Preamplifiers, A/V Control Centers, Integrated
Amplifiers, Source Components and Integrated
Audio Systems. There is a chance the MXA70 and
one of these other components may both respond
to a command issued by the MXA70 Remote
Control or the Remote Control supplied with the
other component. This could affect operations such
as Volume Up/Down and Power On/Off. Many of
these other McIntosh components have the ability
to utilize what is known as “Alternate Codes” to
prevent them from responding to commands issued
4
by the MXA70 Remote Control. For additional
information refer to the Owner’s Manual supplied
with the other McIntosh Component and look in
the “Setup Section - Remote Control Codes” of
the manual. In those rare instances where using
the “Alternate Codes” is not possible, the Remote
Control Sensor on the MXA70 can be switched Off
and the Front Panel Controls can be used for operation instead of using the Remote Control. Refer to
page 20.
7. For the best performance and safety, it is important
to always match the impedance of the Loudspeaker
to the Power Amplifier connections. Refer to pages
10 and 11.
Note: The impedance of a Loudspeaker actually varies as the Loudspeaker reproduces different
frequencies. As a result, the nominal impedance
rating of the Loudspeaker (usually measured at
a midrange frequency) might not always agree
with the impedance of the Loudspeaker at low
frequencies where the greatest amount of power
is required. Contact the Loudspeaker Manufacturer for additional information about the actual
impedance of the Loudspeaker before connecting
it to the McIntosh MXA70.
8. Sound Intensity is measured in units called Decibels and “dB” is the abbreviation.
9. When discarding the unit, comply with
local rules or regulations. Batteries
should never be thrown away or incinerated but disposed of in accordance with
the local regulations concerning battery disposal.
10. For additional information on the MXA70 and
other McIntosh Products please visit the McIntosh
Web Site at www.mcintoshlabs.com.
XLR Connectors
Below is the Pin configuration for the XLR Balanced
Input Connectors on the MXA70. Refer to the diagram
for connection:
PIN 3
PIN 2
PIN 1
PIN 1: Shield/Ground
PIN 2: + Input
PIN 3: - Input
XLR Connectors (Digital Audio)
Below is the Pin configuration for the XLR Balanced
Digital Audio Input Connector on the MXA70. Refer
to the diagram for connection:
PIN 3
PIN 2
PIN 1
PIN 1: Shield/Ground
PIN 2: + Signal
PIN 3: - Signal
Note: When connecting to the MXA70 Digital XLR Input
connector it is important to use a twisted pair
shielded cable.
Power Control Connectors
The Power Control Input Jack receives Power On/
Off Signals (+12 volt/0 volt) when connected to other
McIntosh Components. The Power Control Output
Jack sends Power On/Off Signals
(+12 volt/0 volt) when connected to Power
Control
other McIntosh Components. An
Meter
additional connection is for control- Illumination
Control
Ground
ling the illumination of the Power
Output Meters on McIntosh Power
Amplifiers. A 3.5mm stereo mini phone plug is used
for connection to the Power Control Jacks.
Introduction and Performance Features
Introduction
phone Jack for private listening. Loudspeaker Listening is automatically switched Off when Headphones
are connected.
• Power Control and Remote Control
The Power Control Output connection provides convenient Turn-On/Off of McIntosh Source Components.
• Superior Protection
The patented McIntosh Power Guard circuit prevents
amplifier clipping and protects your valuable Headphones and Loudspeakers. Sentry Monitor protects the
Power Output Circuitry and Headphones in the event
of an impedance mismatch. Built-in Thermal Protection Circuits guard against overheating. Direct Current
Detection and Protection is provided for both Headphones and Loudspeakers.
• Special Power Supply
The large Power Transformer, multiple large filter
capacitors and regulated Power Supply ensures stable
noise free operation even though the power line varies.
• Power Output
The McIntosh MXA70 is designed for connection of a
single 8 ohm Loudspeaker per channel and will deliver 50 watts per channel with less than 0.005% distortion. The Power Amplifier uses ThermalTrak1 Output
Transistors for lower distortion and cool operation.
• Electronic Input Switching and Balanced Input
The Preamplifier uses Logic Circuits controlling
Electromagnetic Switches on all inputs and operating
functions for reliable, noiseless, distortion free switching. There is a Balanced Input for connection of a
source component.
• Glass Front Panel and Super Mirror Chassis
The MXA70 has the famous McIntosh Illuminated
Glass Front Panel with custom designed Fiber Optic
Light Diffusers and extra long life Light Emitting Diodes (LEDs). The Stainless Steel Super Mirror Finish
Chassis ensures the pristine beauty of the MXA70 will
be retained for many years.
• Autoformer Designed for Headphones
The MXA70 is the first McIntosh Amplifier using a
specially designed Autoformer for Headphones. There
are three selectable impedances ranges, allow connection of Headphones from 8 ohms thru 600 ohms.
• Analog and Digital Audio Inputs
The MXA70 has Unbalanced and Balanced Inputs
for connection of Analog sources. There are Coaxial,
Optical, Balanced Digital (AES/EBU) and USB
Digital Inputs. The MXA70 decodes PCM Signals and
upsamples the Digital Signal to 192kHz with 32Bit
resolution before the Digital to Analog process begins.
Now you can take advantage of traditional McIntosh
standards of excellence in the MXA70 Integrated
Audio System. The Power Amplifier section of the
MXA70 will drive Headphones or Loudspeakers to a
high level of performance.
The flexible Preamplifier section provides connections for various input sources, including Digital
sources and music streaming from the Internet via an
USB Computer connection.
The MXA70 reproduction is sonically transparent
and absolutely accurate. The McIntosh Sound is “The
Sound of the Music Itself.”
Performance Features
• HXDTM for Headphones
The MXA70 Headphone Crossfeed Director Circuitry
(HXDTM ) improves the sound localization for Headphone Listening. HXDTM restores the directionality
component of the spatial sound stage normally heard
with Loudspeaker listening.
• Automatic Output Switching
The MXA70 has a Front Panel one-quarter inch Head1
• Multifunction OLED Display
The Front Panel Display indicates source selection,
volume levels, trim settings and setup functions.
• Illuminated Meters
The Illuminated Power Output Meters on the MXA70
are peak responding, and indicate the output of the
amplifier.
• McIntosh Custom Binding Posts
McIntosh Patented gold plated output terminals deliver
high current output. They accept large diameter wire
and spade lugs.
• High Excursion Woofer and Dome Tweeter
The 4” Woofer/Midrange has a very large magnetic
flux stabilizing elements delivers lower bass notes
with less distortion. The three-quarter inch titanium
tweeter vice coil is magnetic-fluid cooled (for less
thermal compression) and reproduces frequencies up
to 45,000 Hz.
• Cast Aluminum Loudspeaker Enclosure
The durable cast aluminum enclosure is finished in a
high gloss, piano black. All of the components making
up the loudspeaker were designed to achieve correct
time arrival in the reproduced musical sound (also
known as group delay).
ThermalTrak™ and ON Semiconductor are trademarks of Semiconductor Components Industries, LLC
5
Dimensions
Dimensions
The following dimensions can assist in determining
the best location for your MXA70 System. There is
additional information on the next page pertaining to
installing the MXA70 System into cabinets.
Side Views of the MXA70 Center Section
Front View of the MXA70
23-1/4"
59.05cm
10-7/8"
27.6cm
5-9/16"
14.1cm
5"
14-5/8"
11-1/2"
12.7cm
37.1cm
29.2cm
Side Views of the MXA70 Loudspeaker
Rear View of the MXA70
10-3/4"
27.7cm
10-3/4"
27.3cm
5-3/8"
13.7cm
10-13/16"
27.5cm
6
10-5/8"
27.9cm
Installation
Installation
The MXA70 Integrated Audio System is designed to
be placed upright on a table or shelf, standing on its
feet. The required ventilation requirements are shown.
Always provide adequate ventilation for your MXA70.
Cool operation ensures the longest possible operating life for any electronic instrument. Do not install
the MXA70 directly above a heat generating device,
such as a Power Amplifier. Allow at least 12 inches
(30.5cm) above the top and 5/8 inches (1.6cm) below
the bottom of the Amplifier, so that airflow is not
obstructed. Allow 19 inches (48.3cm) of depth for
airflow and cable connections.
12"
1"
30.5cm
2.5cm
MXA 70 Front View
1"
2.5cm
12"
30.5cm
19"
48.3cm
MXA 70 Side View
7
MXA70 Rear Panel Connections
RIGHT OUTPUT
connections for an
8 ohm Loudspeaker
LEFT OUTPUT
connections for an
8 ohm Loudspeaker
DIGITAL AUDIO INPUTS
for components with Digital
Optical, Coaxial and Balanced
Digital (AES/EBU)Outputs
sending digital audio signals
Main Fuse holder, refer to
information on the back
panel of your MXA70 to
determine the correct fuse
size and rating
Connect the MXA70 power cord
to a live AC outlet. Refer to information on the back panel of your
MXA70 to determine the correct
voltage for your unit
8
PWR CNTRL (Power Control) IN
receives a turn On/Off signal from a
McIntosh Component; PWR CNTRL
OUT sends a turn On/Off signal to an
other McIntosh Component
BALANCED INPUT
accept high level signal
from a source with a
balanced output
USB Digital Audio
Input for connection to
a computer
PREAMP OUTPUT
sends signals to an external Power Amplifier
or Powered Subwoofer
UNBALanced INPUT
accept high level signal
from a source with an
unbalanced output
Notes
9
Connecting Components
The MXA70 has the ability to automatically switch
power On/Off to McIntosh Source Components via
the Power Control connection.
The connection instructions below, together with
the MXA70 Connection Diagram on the next page is
an example of a typical audio system. Your system
may vary from this, however the actual components
would be connected in a similar manner. For additional information refer to “Connector and Cable Information” on page 4.
Note: When the MXA70 is being added to an existing
Audio (or Audio/Video) System, please proceed to
page 12. If the MXA70 will be used with an external
Power Amplifier, please refer to page 13.
Power Control Connections:
1. Connect a Control Cable from the MXA70 PWR
CTRL (Power Control) OUT Jack to the Power
Control In on the Tuner.
2. Connect a Control Cable from the Tuner Power
Control Out Jack to the Disc Player Power Control
In Jack.
3. Connect any additional McIntosh Components in
a similar manner, as outlined in steps 1 thru 2.
Audio Connections:
4. Connect the Audio Cable from the MXA70 UNBAL 1 L & R jacks to the Disc Player Fixed Audio
Output Jacks.
Note: The Balanced Input may be used instead of the
UNBAL Unbalanced Inputs.
5. Connect any additional Components in a similar
manner, as outlined in step 4.
Optional Digital Audio Connections:
6. Connect an Coaxial Cable from the MXA70 DIGITAL AUDIO INPUT COAX connector to the
Digital Audio Out Optical Connector on the Tuner.
Note: The OPTICAL Input (on the MXA70 and on the
Tuner) may be used instead of the Coaxial Connections.
10
Optional USB Connection:
7. Connect a USB cable with (type A to type B) connectors from the MXA70 USB Input to an available USB connector on a Computer.
Output Terminals
When connecting the Loudspeaker Hookup Cables to
the MXA70 Output Terminals please follow the steps
below:
1. Rotate the top of the Output Terminal Post counterclockwise until an opening
appears. Refer to figures A and
B.
2. Insert the Loudspeaker hookup
cable into the Output Terminal
Opening
Post opening or the cable spade
Figure A
Figure B
lug around the center post of
the Output Terminal. Refer to
figure C.
3. Rotate the top of the Output
Terminal Post clockwise until it
is finger tight. Refer to figure D.
4. Place the supplied McIntosh
Figure C Figure D
Wrench over the top of the Output Terminal and rotate it one
quarter of a turn (90° ) to secure
the Loudspeaker Cable ConnecFigure E
tion. Do not over tighten. Refer
to figure E.
Loudspeaker Connections:
5. The supplied Loudspeaker Connecting Cables are
color coded ends (red and black) to connect between the MXA70 Electronic Chassis Output Terminals to the Input Terminals on the Loudspeakers, being careful to observe the correct polarities.
Note: If the long cables are need, proceed to “Optional Loudspeaker Connections”.
Optional Loudspeaker Connections
Caution: Do not connect the AC Power Cord to the
MXA70 Rear Panel until after the Loudspeaker
Connections are made. Failure to observe this
could result in Electric Shock.
Warning: Loudspeaker terminals are hazardous live and
present a risk of electric shock. For additional
instruction on making Loudspeaker Connections contact your McIntosh Dealer or McIntosh Technical Support.
The McIntosh MXA70 Power Amplifier Circuitry is
designed for a single 8 ohms Loudspeaker connected
to the Right and Left Output Terminals.
The recommended cable size is shown below:
Cable Distance vs American Wire Gauge (Size)
Loudspeaker
Impedance
25 feet
(7.62 meters)
or less
50 feet
(15.24 meters)
or less
100 feet
(30.48 meters)
or less
8 Ohms
16AWG
14AWG
12AWG
1. Prepare the Loudspeaker Hookup Cable for attachment to the MXA70:
Bare wire cable ends:
Carefully remove sufficient insulation from
the cable ends, refer to figures F, G & H. If the
cable is stranded,
carefully twist the
strands together as
Figure H
Figure G
tightly as possible. Figure F
Notes: 1. If desired, the twisted ends can be tinned
with solder to keep the strands together.
2. The prepared bare wire cable ends may be
inserted into spade lug connectors.
3. Banana plugs are for use in the United
States and Canada only.
Banana Plugs are for use in the United States and
Canada only:
2. Attach the previously prepared bare wire cable ends
into the banana plugs and secure the connections.
Refer to figure I.
Connecting Components
3. Rotate the Output Terminal Post clockwise until it is
finger tight. Refer to figure J. Then using the McIntosh Wrench, rotate the top
of the Output Terminal one quarter of a
Figure I
turn (90° ). Do not over tighten. Refer
to figure E.
4. Referring to figure K, connect the
Loudspeaker hookup cables with banana
Figure J
plugs into the hole at the top of the
terminal to the MXA70 Negative
Output Terminal and Positive Output Terminal to the Loudspeaker
Figure K
Terminal Connections being careful
to observe the correct polarities.
Refer to “General Information” Note 7 on page 4
for additional information.
5. Connect the MXA70 power cord to an active AC
outlet.
Spade Lug or Wire Connections:
6. Connect the Loudspeaker hookup cables between
to the MXA70 Output Terminals and Loudspeaker
Input Terminals for both channels. Be careful to
observe the correct polarities (Positive and Negative) at both of the cables. Insert the spade lug connector or prepared section of the cable end into the
terminal side access hole, and tighten the terminal
cap until the cable is firmly clamped into the terminals so the lugs or wire cannot slip out. Refer to
figures L and M.
Refer to “General Information” Note 7 on page
Figure M
4 for additional informa- Figure L
tion.
7. Connect the MXA70 power cord to an active AC
outlet.
Right Loudspeaker
Left Loudspeaker
Red
Red
+
-
-
+
Black
Black
Computer
Connect to
AC Outlet
Tuner
30
Disc Player
MCD550
SACD/CD PLAYER
McINTOSH LABORATORY, INC.,
BINGHAMTON, NY
HANDCRAFTED IN USA WITH US AND IMPORTED PARTS
11
System Thru Connections
System Thru Connections
The MXA70 can also be part of an existing Audio or
Audio/Video Sound System. The MXA70 allows connection of Headphones for private listening. It can also
drive Loudspeakers in a second room. The MXA70
becomes active when the Main Preamplifier or Audio/
Video Controller is On. In the example below, the
MXA70 will go On/Off when the OUTPUT 2 function of the Preamplifier is activated using the Power
Control 2 connections.
1. Connect Audio Cables from the Preamplifier
OUTPUT 2 jacks to the MXA70 Analog Audio
UNBAL jacks.
Note: The Preamplifier Balanced OUTPUT 2 connected to the MXA70 BALANCED Input may be used
instead of the unbalanced connections.
2. Connect a Control Cable from the Preamplifier
POWER CONTROL OUTPUT 2 jack to the
MXA70 PWR CTRL (Power Control) IN Jack.
For additional operational information when using the
System Thru Connection with the MXA70 and Main
Preamplifier or Audio/Video Controller, refer to “System Thru Operation” on page 26
12
Preamplifier
External Power Amplifier Connections
External Power Amplifier Connections
The MXA70 has the ability to drive an External Power
Amplifier. In the example below, the MXA70 automatically switches the External Power Amplifier On/
Off via Power Control function.
1. Connect Audio Cables from the MXA70 PREAMPlifier OUTPUT jacks to the External Power
Amplifier IN (Left and Right) jacks.
2. Connect a Control Cable from the MXA70 PWR
CNTRL (Power Control) OUT jack to the External Power Amplifier Power Control IN Jack.
3. Refer to page 10 for connecting other
component(s) to the MXA70.
4. Refer to the External Power Amplifier Owner’s
Manual for connection of Loudspeakers.
Power Amplifier
13
Remote Control Push-Buttons
Adjusts or Selects the active TRIM function also manually tune down the dial
with contemporary McIntosh Tuners
Directional Push-buttons Up, Down, Left and Right
Adjusts or Selects the active TRIM function also manually tune up the dial with
contemporary McIntosh Tuners
Press to activate TRIM Mode
Scrolls through TRIM Functions
Scrolls through TRIM Functions
Decreases the volume level
Increases the volume level
Selects the desired INPUT
LED illuminates during the time a remote
command is sent to the MXA70
Mutes and unmutes the audio
Powers the MXA70 ON or OFF
Selects the PREVIOUS 9 Station
Preset on contemporary McIntosh
Tuners
Selects the NEXT : Station Preset
on contemporary McIntosh Tuners
Note: Push-buttons whose function is not identified above are for use with other McIntosh Products.
14
How to use the Remote Control
How to use the Remote Control
The supplied Remote Control performs the various
Operating Functions for the MXA70 Integrated Audio
System.
Note: Refer to the “How to Operate” Section of this
manual for additional information.
Back and Next
When using an optional contemporary McIntosh
Tuner with the MXA70, select the next Station Preset
by press the : Push-button. Select the previous Station Preset by pressing the 9 Push-button.
Input Source Selection
Press the Push-button → to select the desired program
source.
Volume
Press the + or - Push-buttons to increase or decrease the listening level.
Mute
Press the (Mute) Push-button to mute the audio and
a second time to resume listening.
Select Push-Button
Press the Select Push-button to activate the TRIM
Mode. Then use the Directional Push-Buttons to select
a Trim Mode Function and make changes.
Directional Push-Buttons
After having pressed the SELECT Push-button,
press the ◄ ► (Left or Right) Push-buttons to scroll
through the various Trim Functions. Then press the
▲ ▼ (Up or Down) Push-buttons to make a change to
the current Trim Setting.
Note: If a contemporary McIntosh Tuner is used with
the MXA70 the ▲ ▼ (Up or Down) on the
Remote Control will allow for manual tuning of
stations. Refer to “General Information, note 6”
on page 4 for additional information.
15
LED indicates when the Right
Channel Amplifier POWER
GUARD circuit activates
LED indicates when the Left
Channel Amplifier POWER
GUARD circuit activates
Meter indicates the
Left Channel Output
of the amplifier
Meter indicates the
Right Channel Output
of the amplifier
IR Sensor receives
commands from a
Remote Control
VOLUME Control allows
adjustment of the listening
level for both channels.
Also used to activate the
HXD and Profiles Modes
along with selecting a given
Profile.
INPUT Control allows
the selection of sources
for listening and to select
different Setup Functions.
Also used to activate the
Trim and Setup Modes.
OUTPUT Control allows the
selection of either Headphones
(various impedances) or Loudspeakers. When in Setup Mode
used for changing the various
function settings.
16
Indicates the Dynamic Crossfield
circuitry is active when illuminated
Connection for dynamic
type headphones, for
private listening
STANDBY/ON Push-button with
indicator switches the MXA70
ON or OFF (Standby) and resets
the microprocessors
INFORMATION DISPLAY indicates
the Sources, Volume, other Audio
Settings, Operational Functions and
Setup Mode Settings
PROFILE Control allows
selection of stored Profile
Settings and used for
various Profile Modes
Setup
How to Operate the Setup Mode
Your McIntosh MXA70 has been factory configured
for default operating settings that will allow immediate enjoyment of superb audio without the need for
further adjustments. If you wish to make changes to
the factory default settings, a Setup Feature is provided to customize the operating settings using the
Front Panel Display. Refer to the MXA70 Front Panel
Illustration on the previous page while performing an
introduction into operating the Setup Mode, follow the
steps below.
Note: If the MXA70 is currently On, proceed to step
2.
1. Press the STANDBY/ON Push-button on the Front
Panel or press the
(Power) Push-button on the
Remote Control to switch On the MXA70. The
MXA70 will go through a brief startup intialization with the Front Panel Display indicating the
last used input and volume setting. This is followed by the volume setting indication starting at
zero and then increasing to the last used volume
setting. Refer to figure 1.
INPUT:
UNBAL
20%
Default Settings
3. Now rotate the INPUT CONTROL Clockwise
until the Front Panel Display indicates “McIntosh
USB AUDIO, V_.__ Firmware”. Refer to figure 3
and to page 18 for additional information.
MLI USB Audio
V_.__
Figure 3
4. Next, rotate the INPUT CONTROL Clockwise
again until the Front Panel Display indicates
“SOURCE: UNBAL, NAME: UNBAL” Refer to
figure 4.
INPUT:
NAME:
UNBAL
UNBAL
Figure 4
5. Rotate the INPUT CONTROL Clockwise again
to select other Setup Functions. Refer to pages 18
thru 20.
6. To exit from the Setup Mode, press the INPUT
CONTROL and the Front Panel Display will revert
back to its normal display. Refer to figure 1.
The Default Settings Chart below indicates the Function Name, Default Setting and the Page Number for
additional information.
Default Settings
Function Name
MXA70
McIntosh USB Audio
INPUT NAME
(Re-asign Input Names)
SPEAKER MODE
SUBWOOFER MODE
POWER MODE
(Auto Off)
REMOTE CONTROL
Setting
Page No.
V_._ _
S/N: _ _ _ _ _ _ _
18
V_.__
18
INPUT:_________
NAME:__________
18
SMALL
19
DISABLED
19
ON
20
ENABLED
20
Note: Setup Mode operations should be performed
in the order they appear in the Setup Menu as
they are interactive.
Figure 1
2. Press and hold in the INPUT CONTROL until the
Front Panel Display indicates “MXA70 V_.__,
S/N: _______”. The information indicated on the
Front Panel Display includes the Model Number,
Firmware Version and the Serial Number for this
unit; see page 18 for additional information. Refer
to figure 2.
MXA70 V_.__
S/N: _______
Figure 2
17
Firmware Version
Input Renaming
The MXA70 functionality is controlled by internal
software that is known as Firmware. The MXA70
has two different Firmwares, one is the “System
Firmware” (responsible for the basic operation of the
MXA70) and the other known as USB Audio Firmware (responsible for the “USB Connection and Conversion” of a Digital Audio Signal from the Computer). The Version of the Firmwares in the MXA70 can
be identified at any time by utilizing the Setup Mode.
1. Press and hold the INPUT CONTROL until the
Front Panel Display indicates “MXA70 V_.__,
S/N: _______”. The number after the “V” is the
firmware version and the number after the “S/N”
is the serial number of the unit. Refer to figure 2.
2. Rotate the INPUT CONTROL Clockwise until the
The MXA70 Default Input Names (UNBAL, BALANCED, OPTICAL, COAX and AES/EBU as indicated on the Front Panel Display) can be customized
with a different name up to eight characters long (My
Phone, MCD550, etc.). The available characters for
renaming the input include the following: ! < > * , / _0123456789abcdefghijklmnopqrst
uvwxyzABCDEFGHIJKLMNOPQRS
TUVWXYZ.
In the following example, the UNBAL Input will be
renamed to “MY-PHONE”.
1. Press and hold the INPUT CONTROL until the
Front Panel Display indicates the Model, Firmware
Version and Serial Number. Refer to figure 2. Then
rotate the INPUT CONTROL and select the Setup
Menu item “INPUT: UNBAL, NAME: UNBAL”.
Refer to figure 4.
MXA70 V_.__
S/N: _______
Figure 2
Front Panel Display indicates “MLI USB AUDIO,
V_ . _ _. The number after the “V” is the USB
Audio Firmware version”. Refer to figure 3.
3. To exit from the Setup Mode, press the INPUT
MLI USB Audio
V_.__
Figure 3
CONTROL and the Front Panel Display will revert
back to its normal display.
INPUT:
NAME:
UNBAL
UNBAL
2. Press and hold in the VOLUME Control until the
character “U” of the “NAME: UNBAL” starts
flashing. Refer to figure 5.
UNBAL
UNBAL
Figure 5
3. Rotate the PROFILE Control until the character
“M” appears. Refer to figure 6.
4. Rotate the OUTPUT Control until the character
“N” of the “NAME: UNBAL” starts flashing.
Refer to figure 7.
18
UNBAL
MNBAL
Figure 6
INPUT:
NAME:
UNBAL
MNBAL
Figure 7
5. Rotate the PROFILE Control until the character
“Y” appears. Refer to figure 8.
INPUT:
NAME:
UNBAL
MYBAL
Figure 8
6. Repeat steps 3 thru 5 until the new name of “MYPHONE” is indicated on the Front Panel Display.
Refer to figures 9 thru 11.
INPUT:
NAME:
UNBAL
MY-AL
Figure 9
Figure 4
Note: If the UNBAL Input is not displayed, press the
VOLUME Control repeatedly until it is displayed.
INPUT:
NAME:
INPUT:
NAME:
INPUT:
NAME:
UNBAL
MY-PL
Figure 10
INPUT:
NAME:
UNBAL
MY-PHONE
Figure 11
7. To save the new Input Name press and hold the
VOLUME Control until the word SAVED appears
momentarily on the Front Panel Display. Refer to
figure 12.
INPUT:
NAME:
UNBAL
SAVED
Figure 12
Setup, con’t
Record any changes made to the various default Input
Names in the following chart for future reference.
8. To exit from the Setup Mode, press the INPUT
CONTROL and the Front Panel Display will revert
back to its normal display.
Input Renaming
Default Input Name
New Input Name
UNBAL
BALANCED
OPTICAL
COAX
AES/EBU
USB
Speaker Size
The MXA70 allows for the connection of Loudspeakers with different performance capabilities. One of the
difference in Loudspeaker performance is the ability
to reproduce bass frequencies down to 35Hz within
-3dB of the midrange frequencies.
The MXA70 provides two different settings,
SMALL and LARGE. When using the MXA70
Loudspeakers, use the default setting of SMALL. The
LARGE listing refers to the Loudspeaker’s capability
for reproducing bass frequencies down to 35Hz within
-3dB of the midrange frequencies. If a Loudspeaker
can not reproduce bass frequencies down to 35Hz
within -3dB of the midrange frequencies, it is considered SMALL.
In the following example, the Speaker Size default setting of SMALL will be changed to LARGE:
1. Press and hold the INPUT CONTROL until the
Front Panel Display indicates the Model, Firmware Version and Serial Number. Refer to figure
2. Then rotate the INPUT CONTROL and select
the Setup Menu item “SPEAKER MODE, Small”.
Refer to figure 13.
Refer to figure 15.
SPEAKER SIZE
Small
SUBWOOFER MODE
Disabled
Figure 13
Figure 15
2. Rotate the OUTPUT Control until the Front Panel
Display indicates “SPEAKER MODE, Large”.
Refer to figure 14.
2. Rotate the OUTPUT Control until the Front
PanelDisplay indicates “SUBWOOFER MODE,
Enabled”. Refer to figure 16.
SPEAKER SIZE
Large
SUBWOOFER MODE
Enabled
Figure 16
Figure 14
3. To exit from the Setup Mode, press the INPUT
CONTROL and the Front Panel Display will revert
back to its normal display.
Subwoofer Mode
The MXA70 is designed to work with an external
Powered Subwoofer. The subwoofer would be used
when the Loudspeakers connected to MXA70 Output
Terminals do not have the ability to reproduce bass
frequencies down to 35Hz (within -3dB of the midrange frequencies).
The MXA70 provides two different Subwoofer
Mode settings, “Disabled” and “Enabled”. The Default
Setting of “Disabled” provides a Stereo Signal at the
PREAMPlifier OUPUT Jacks. When the setting is
chanaged to “Enabled” the Left and Right channel
signals are combined into a monaural signal available
at both PREAMP OUPUT Jacks. In the following
example, the Subwoofer Mode default setting of DISABLED will be changed to Enable:
1. Press and hold the INPUT CONTROL until the
Front Panel Display indicates the Model, Firmware
Version and Serial Number. Refer to figure 2. Then
rotate the INPUT CONTROL and select the Setup
Menu item “SUBWOOFER MODE, Disabled”.
Note: When the MXA70 Subwoofer Mode is set
to “ENABLED” it is important the Powered
Subwoofer internal crossover frequency be set
to 80Hz. It is recommended the Professionals
at your McIntosh Dealer, who are skilled in all
aspects of room acoustics be involved when the
MXA70 is used with a Powered Subwoofer and
any associated audio equipment.
3. To exit from the Setup Mode, press the INPUT
CONTROL and the Front Panel Display will revert
back to its normal display.
Power Mode
The MXA70 incorporates an Auto Off Feature, which
automatically places the preamplifier into the Power
Saving Standby/Off Mode. This occurs approximately
30 minutes after there has been an absence of audible
audio signals on the selected input (on either channel) or user activity (includes changes to any of the
Operation Functions such as source selection, volume
adjustment, etc). If it is desirable to disable the Auto
Off Feature perform the following steps:
1. Press and hold the INPUT CONTROL until the
Front Panel Display indicates the Setup Mode is
19
Setup, con’t
Power Mode, con’t
active. Then rotate the INPUT CONTROL until
the Setup Menu item “POWER MODE, Auto Off:
On” appears on the Front Panel Display. Refer to
figure 17.
POWER MODE
Auto Off: On
Figure 17
2. Rotate the OUTPUT Control until “POWER
MODE, Auto Off: Off” appears on the Front
Panel Display. Refer to figure 18.
POWER MODE
Auto Off: Off
Figure 18
3. To exit from the Setup Mode, press the INPUT
CONTROL and the Front Panel Display will revert
back to its normal display.
Remote Control
The Front Panel IR Sensor used for Remote Control
Operation can be disabled in the event there is a conflict with another McIntosh component located in the
same room as the MXA70. Refer to “General Information, note 6” on page 4 for additional information.
Disable the Front Panel IR Sensor by performing the
following steps:
1. Press and hold the INPUT CONTROL until the
Front Panel Display indicates the Model, Firmware
Version and Serial Number. Then rotate the INPUT CONTROL and select the Setup Menu item
“REMOTE CONTROL, Enabled”. Refer to figure
19.
REMOTE CONTROL
Enabled
Figure 19
20
2. Rotate the OUTPUT Control until the Front PanelDisplay indicates “REMOTE CONTROL, Disabled”. Refer to figure 20.
REMOTE CONTROL
Disabled
Figure 20
3. To exit from the Setup Mode, press the INPUT
CONTROL and the Front Panel Display will revert
back to its normal display.
How to Operate the MXA70
How to Operate the MXA70
Power On and Off
The Red LED beside the STANDBY/ON Push-button
lights to indicate the MXA70 is in Standby mode.
To switch ON the MXA70, press the STANDBY/ON
Push-button on the Front Panel or press the
(Power)
Push-button on the Remote Control. The MXA70
will go through a brief startup initialization, with the
Front Panel Display indicating the last used input and
volume setting. This is followed by the volume setting
indication starting at zero and then increasing to the
last used volume setting. Refer to figures 50, 51 and
52. To switch OFF the MXA70, press the STANDBY/
ON Push-button on the Front Panel or the OFF Pushbutton on the Remote Control.
INPUT:
UNBAL
20%
Figure 51
Note: For an explanation of the Remote Control
Push-button functions, refer to pages 14 and 15.
Source Selection
Rotate the INPUT Control to select the desired input
or press the appropriate push-button on the Remote
Control. Refer to figures 50 and 53.
Volume Control
Rotate the Front Panel VOLUME Control or use the
Up (+) or Down (-) Push-buttons on the Remote
Control for the desired listening level. Refer to figures
50 and 52.
Trim Functions Introduction
The MXA70 has various Trim Selections with Adjustments. The Trim Functions include Bass Boost,
Balance, Level (Input Trim), Mono/Stereo, Meter
Backlight, Display (Information) and Digital Audio
(Display Information). The Bass Boost, Balance, Level
(Input Trim), Mono/Stereo, Trim Settings are stored
in memory independently for each Input Selected, the
other Trim Settings are the same for all inputs.
The selection and adjustment of all Trim Functions
may be performed by first Momentarily pressing the
Front Panel INPUT Control. Then rotate the INPUT
Control to select the desired Trim Function. This is
followed by rotating the OUTPUT Control to make a
change/adjustment in the
Trim Setting. To verify
a TRIM Setting without
changing it, press the
INPUT Control and then
Rotate the INPUT Control to select the desired
Trim Function. After approximately 5 seconds the
Display returns to indicate
the Input Selection and
Volume Level.
BASS BOOST
The Intensity of the Low
Frequencies in the music
Figure 52
can be increased by using the Bass Boost Trim
Function. To make an adjustment perform the following:
1. Momentarily press the Front Panel INPUT Control
to enter the TRIM Mode. Then rotate the INPUT
Control until “BASS BOOST _ dB” appears on the
Front Panel Display. Refer to figure 53.
BASS BOOST
0dB
Figure 53
2. Rotate the OUTPUT Control to change the Bass
Boost, the range of adjustment is from 0dB to
+12.5 dB in 2.5 dB steps. Refer to figure 54.
BASS BOOST
+2.5dB
Figure 50
Figure 54
21
How to Operate the MXA70, con’t
After approximately 5 seconds the Display returns to
indicate the Input Selection and Volume Level.
BALANCE
The Channel Balance while listening can vary with
different program sources. When using Loudspeakers the room acoustics and listening positions also
can effect the Channel Balance. Use the Balance Trim
Function as needed to achieve approximately equal
listening volume levels in each channel. To adjust the
Balance perform the following:
1. Momentarily press the Front Panel INPUT Control
to enter the TRIM Mode. Then rotate the INPUT
Control until “BALANCE: _ dB” appears on the
Front Panel Display. Refer to figure 55.
BALANCE:
<
||
0 dB
>
Figure 55
2. Rotate the OUTPUT Control to change the Channel Balance, the range of adjustment is 60dB (to
emphasize the Left or Right Channel) in 1 dB
steps. Refer to figures 56 and 57.
BALANCE:
< ||||||||||||||||||
60 dB
>
Figure 56
BALANCE:
60 dB
<
|||||||||||||||||||| >
Figure 57
After approximately 5 seconds the Display returns to
indicate the Input Selection and Volume Level.
22
TRIM LEVEL
Source Components can have slightly different volume
levels resulting in the need to readjust the MXA70
Volume Control when switching between different
Inputs. The MXA70 allows the adjustment of levels
for each of the Inputs for the desired same relative
volume. The UNBAL and OPTICAL Inputs are used
in the following example.
Note: The TRIM Level Adjustments made are retained in
permanent memory.
1. Rotate the INPUT Control to select the UNBAL
Input and adjust the VOLUME Control for the
desired listening level.
2. Momentarily press the Front Panel INPUT
Control to enter the TRIM Mode. Then rotate
the INPUT Control until “LEVEL: _. _ dB”
appears on the Front Panel Display. Rotate the
OUTPUT Control until the Front Panel Display
indicates “LEVEL: 0.0dB”. Refer to figure 58.
LEVEL:
-
||
0.0 dB
Figure 58
+
The range of TRIM Adjustment is ± 6dB. Refer
to figures 59 and 60.
LEVEL: -6.0 dB
- |||||||||||||||||
+
Figure 59
LEVEL:
-
6.0 dB
|||||||||||||||| +
Figure 60
Note: The UNBAL Input is serving as a reference level or choose another Input frequently
listened to.
3. Note the current listening level. Then rotate
INPUT Control to select the OPTICAL Input and
note if the relative volume is louder or quieter
than the volume level of the UNBAL.
4. Momentarily press the Front Panel INPUT
Control to enter the TRIM Mode. Then rotate the
INPUT Control until “LEVEL: _. _ dB” appears
on the Front Panel Display. Using the OUTPUT
Control adjust the TRIM Level to match the same
relative volume level heard when listening to the
UNBAL Input.
5. In our example the relative volume level of the
OPTICAL Input is louder than the UNBAL
Input, so the trim level for the OPTICAL Input is
reduced to -2.5 dB. Refer to figure 61.
LEVEL: -2.5 dB
||||||||
-
+
Figure 61
6. Repeat steps 1 thru 4 until the relative volume
is the same between the UNBAL and OPTICAL
Inputs.
7. Repeat the above steps for the remaining inputs
with component sources connected until they all
have the same relative volume levels. Record any
changes made to the various inputs from the default settings in the “Input Trim Settings” Chart
on the next page.
After approximately 5 seconds the Display returns to
indicate the Input Selection and Volume Level.
MONO/STEREO MODE
By default the Stereo Mode is active for all Input
Sources however, any Input Source may be assigned
to Mono Mode. To change Stereo Mode to Mono for a
given Input Source, perform the following steps:
How to Operate the MXA70
1. Momentarily press the Front Panel INPUT Control
to enter the TRIM Mode. Then rotate the INPUT
Control until “MONO / STEREO” appears on the
Front Panel Display. Refer to figure 62.
MONO / STEREO
Stereo
Figure 62
MONO / STEREO
Mono
Figure 63
After approximately 5 seconds the Display returns to
indicate the Input Selection and Volume Level.
Input Trim Settings
Input Name
Figure 64
METER BACKLIGHT
Off
Figure 65
2. Rotate the OUTPUT Control to change the Mode
to “Mono”. Refer to figure 63.
Connection Type
METER BACKLIGHT
On/Auto
New Trim Level
UNBAL
BALANCED
OPTICAL
COAX
AES/EBU
USB
METER BACKLIGHT
The MXA70 Front Panel Meter Illumination may be
switched On or Off by performing the following:
1. Momentarily press the Front Panel INPUT Control
to enter the TRIM Mode. Then rotate the INPUT
Control until “METER BACKLIGHT” appears on
the Front Panel Display. Refer to figure 64.
2. Rotate the OUTPUT Control to change illumination to “Off”. Refer to figure 65.
After approximately 5 seconds the Display returns to
indicate the Input Selection and Volume Level.
Note: Meter Illumination of contemporary McIntosh
Power Amplifiers will also switch On/Off when
connected to the MXA70 via a power control
cable. Refer to “Power Control Connections”
on page 4.
DISPLAY
The MXA70 Front Panel Dispaly Illumination may be
switched On or Off by performing the following:
1. Momentarily press the Front Panel INPUT Control
to enter the TRIM Mode. Then rotate the INPUT
Control until “DISPLAY” appears on the Front
Panel Display. Refer to figure 66.
Display will switch On to indicate current status. Then
approximately 5 seconds later the Display will switch
Off.
DIGITAL AUDIO
By default, the Digital Audio Display is switched On
to display information about the type of digital signal
present when a digital input is selected. To switch Off
Digital Audio Display perform the following steps:
1. Momentarily press the Front Panel INPUT Control
to enter the TRIM Mode. Then rotate the INPUT
Control until “DISPLAY” appears on the Front
Panel Display. Refer to figure 68.
DIGITAL AUDIO
Disp Info: On
Figure 68
2. Rotate the OUTPUT Control to change the Display
to “Off”. Refer to figure 69.
DIGITAL AUDIO
Disp Info: Off
Figure 69
DISPLAY
On
After approximately 5 seconds the Display returns to
indicate the Input Selection and Volume Level.
Figure 66
Mute
Press the MUTE Push-button on the Remote
Control to Mute the Audio in the Headphones, Loudspeakers and PRE AMP OUTPUT Jacks. The Front
Panel Display will indicate the Input Name and with
the word MUTE in place of the actual volume setting.
Refer to figure 70.
2. Rotate the OUTPUT Control to change the Display
to “Off”. Refer to figure 67.
DISPLAY
Off
Figure 67
After approximately 5 seconds the Display will switch
Off. Any Front Panel Control Operation (or Remote
Control Operation such as Input Selection) and the
INPUT: UNBAL
MUTE
Figure 70
23
How to Operate the MXA70, con’t
To un-MUTE the Audio press the MUTE Pushbutton on the Remote Control, adjust the Volume level
or change Inputs.
Headphones Jack
Connect a pair of dynamic headphones to the Headphones Jack with a 1/4” (6.3mm) stereo phone type
plug for private listening.
Note: Use the OUTPUT Control to select the correct
impedance range.
Headphone HXDTM
The MXA70 Headphone Crossfeed Director (HXDTM
)
improves the sound localization for Headphone Listening. HXDTM restores the directionality component
of the spatial sound stage normally heard with Loudspeaker listening. To activate the HXD when Headphones are connected to the Front Panel Headphone
Jack perform the following:
1. Momentarily press the Front Panel VOLUME
Control to enable the HXD Mode. The HXD Icon
located above the Headphone Jack
will illuminate Green. Refer to figure
71.
2. To disable the HXD Mode momentarily press the Front Panel VOLUME
Control.
Note: HXD TMMode is automatically
disabled when SPEAKERS are
selected with the OUTPUT
Control.
24
Figure 71
Output Control
Rotate the OUTPUT Control to select the desired listening device, Headphones or Loudspeakers. Refer to
the OUTPUT CONTROL SELECTION chart below:
Notes: 1. For the best performance and safety, it is important to always match the impedance of the
Headphones and Loudspeakers to the MXA70
Output.
2. Do not exceed the maximum power handling
capacity of Headphones or Loudspeakers
connected to the MXA70.
3. The first time the OUTPUT Control is rotated
the Front Panel Display will indicate the current Output selection.
OUTPUT CONTROL SELECTION
Listening
Impedance
Device
Loudspeakers
8 ohms
Headphones
8 to 40 ohms
Headphones
40 to 150 ohms
Headphones
150 to 600 ohms
Headphones
8 to 40 ohms
Headphones
40 to 150 ohms
Headphones
150 to 600 ohms
Power
Level
--Norm
Norm
Norm
High
High
High
Refer to
Output
figure No.
50 Watts
71
250 mWatts
72
250 mWatts
73
250 mWatts
74
1 Watt
75
1 Watts
76
1 Watt
77
Profile Mode
The MXA70 has the ability to store up to 5 different Profile Settings for Headphone use. Each profile
setting stores the selected Headphone Impedance
Range, HXD Setting (On or Off), Bass Boost Setting
(0 to +12.5 dB) and asign a custom name for it. In the
following example a Profile will be created, recalled,
renamed and finally deleted using the Profile Setup
Mode:
PROFILE SETTINGS
1. Using the OUTPUT Control select, from the six
INPUT: UNBAL
SPEAKER
Figure 72
INPUT: UNBAL
NORM 8O - 40O
Figure 73
INPUT: UNBAL
NORM 40O - 150O
Figure 74
INPUT: UNBAL
NORM 150O - 600O
Figure 75
INPUT: UNBAL
HIGH 8O - 40O
Figure 76
INPUT: UNBAL
HIGH 40O - 150O
Figure 77
INPUT: UNBAL
HIGH 150O - 600O
Figure 78
How to Operate the MXA70, con’t
choices available, the correct impedance and power
output for the Headphones that will be used for
listening. Refer to figures 72 thru 78.
2. If desired, select the HXDTM Mode by momentarily
press the the VOLUME Control. The HXD Icon
located above the Headphone Jack will illuminate
Green. Refer to figure 71.
3. If desired, select the amount of TRIM Bass Boost
by momentarily pressing the INPUT Control.
Then rotate the INPUT Control to select BASS
BOOST followed by using the OUTPUT Controlfor the desired increase. Refer to figures 53 and 54
on page 21.
CREATE A PROFILE
With the Impedance/Power, HXD and Bass Boost settings made, they will now be assigned to Profile1, for
easy recall at a later time. The PROFILE and VOLUME Controls are used to perform the various Profile
Functions (Save, Select Rename and Delete). When
the PROFILE Control is rotated and there are no saved
Profiles the Front Panel Display will indicate.the currently selected Input and “NO PROFILE SAVED”.
Refer to figure 79.
INPUT: UNBAL
NO PROFILE SAVED
Figure 79
Create new Profile1 by following the below steps:
4. Press and hold in the VOLUME CONTROL until
the Front Panel Display indicates “SAVE PROFILE, Profile1”. Refer to figure 80.
SAVE PROFILE
Profile1
Figure 80
5. To store “Profile 1” into memory press and hold in
the VOLUME CONTROL until the Front Panel
Display indicated “SAVE PROFILE, Profile
Saved”. Refer to figure 81.
SAVE PROFILE
Profile Saved
Figure 81
6. To exit the Profile Setup Mode momentarily press
the VOLUME Control.
To select a previously saved Profile perform the follwing steps:
7. Rotate the PROFILE Control to select from the
available Profiles stored in memory. Refer to
figure 82.
INPUT: UNBAL
Profile1
Figure 82
Note: The first time the PROFILE Control is
rotated, the Front Panel Display will indicate the current Profile selection. Refer to
figure 83.
INPUT: UNBAL
PROFILE NOT SET
Figure 83
RENAMING A PROFILE
The MXA70 Profile Name (Profile1 thru Profile5 as
indicated on the Front Panel Display) can be customized with a different name up to eight characters long
(Y10-PRO, etc.). The available characters for renaming the input include the following: ! < > * , / - _ 0 1
23456789abcdefghijklmnopqrstuv
wxyzABCDEFGHIJKLMNOPQRST
U V W X Y Z . In this example the previously created
and saved Profile1 will be renamed to “Y10-PRO” by
performing the follwing steps:
8. Refering to figure 84, rotate the PROFILE Control
to select “NAME PROFILE, Profile1”.
NAME PROFILE
Profile1
Figure 84
9. Press and hold the VOLUME Control until the
the character “P” of the “Profile1” starts flashing.
Refer to figure 85.
NAME PROFILE
Profile1
Figure 85
11. Rotate the PROFILE Control until the character
“Y” appears . Then Rotate the OUTPUT Control
until the character “r” of the “Yrofile1” starts
flashing. Refer to figure 86.
NAME PROFILE
Yrofile1
Figure 86
12. Rotate the PROFILE Control until the character
“1” appears. Then rotate the OUTPUT until the
character “o” of the “Y1ofile1” starts flashing.
Refer to figure 87.
NAME PROFILE
Y1ofile1
Figure 87
13. Repeat steps 9 thru 12 until the new name of
“Y10-PRO” is indicated on the Front Panel Display. Refer to figure 88.
NAME PROFILE
Y10-PRO
Figure 88
25
How to Operate the MXA70, con’t
Profile Mode, con’t
14. To store the renamed Profile into memory press
and hold in the VOLUME CONTROL until the
Front Panel Display indicated “SAVE PROFILE,
Profile Saved”. Refer to figure 81.
SAVE PROFILE
Profile Saved
Figure 81
15. To exit the Profile Rename Mode momentarily
press the VOLUME Control.
DELETING PROFILES
There are two ways to Delete Profile(s), delete one
saved Profile or delete all saved Profile Names. In the
first example one Profile will be deleted. Perform the
following steps:
16. Using the Profile Control, select the Profle (1 thru
5) to be deleted. Refer to figure 82.
INPUT: UNBAL
Profile1
Figure 82
17. Rotate the Profle Control to select “DELETE
PROFILE1”. Refer to figure 89.
DELETE PROFILE
Profile1
Figure 89
18. Press and hold in the VOLUME CONTROL until
the Front Panel Display indicates “DELETE PROFILE, Profile Deleted”. Refer to figure 90.
To Delete All the stored Profiles, perform the following steps:
20. Using the Profile Control, select one of the
availble Profiles (1 thru 5). Refer to figure 91.
INPUT: UNBAL
Y10-PRO
Figure 91
21. Rotate the Profle Control to select “DELETE
ALL, Saved Profiles”. Refer to figure 92.
DELETE ALL
Saved Profile
Figure 92
22. Press and hold in the VOLUME CONTROL until
the Front Panel Display indicates “DELETE ALL,
All Deleted”. Refer to figure 93.
DELETE ALL
All Deleted
Figure 93
23. To exit the Profile Delete Mode momentarily
press the VOLUME Control.
Power Output Meters
The MXA70 Power Output Meters indicate the power
delivered to the Loudspeakers or Headphonese. Refer
to figure 100. The meters respond to all the musical
DELETE PROFILE
Profile Deleted
Figure 90
19. To exit the Profile Delete Mode momentarily
press the VOLUME Control.
26
Figure 100
information being produced by the Amplifier. They
indicate to an accuracy of at least 95% of the power
output with only a single cycle of a 2,000Hz tone
burst.
Power Guard
During normal operation, the Front Panel Power
Guard Indicators will momentarily illuminate during
peaks in the audio signals. In the event the MXA70
over heats, due to improper ventilation, high ambient
temperature and/or impedance mismatch, the internal protection circuits will activate. The Front Panel
Power Guard Indicators will continuously illuminate
and the audio will be muted. When the MXA70 has
returned to a safe operating temperature, normal operation will resume.
Using a Separate Power Amplifier or Subwoofer
To use a separate amplifier instead of the MXA70
built-in Power Amplifier, connect the Loudspeakers to the separate power amplifier. Refer to page 13
“External Power Amplifier Connections” for addition
connection information. An external
Powered Subwoofer may also be used
with the MXA70. Refer to page19
“Subwoofer Mode” for additional information.
When either an External Power Amplifier or Power Subwoofer is used with
Figure 101
the MXA70 the Rear Panel PREAMP
OUTPUT Jacks are used. Refer to figure 101.
System Thru Operation
When the MXA70 is connected to a Main Preamplifier or Audio/Video Controller (as illustrated on
page 12) it is important to maximize the combined
How to Operate the MXA70, con’t
performance. For the best performance, the volume
control on the MXA70 should be set to 70%. The
Volume Control on the Main Preamplifier or Audio/
Video Controller should be used to adjust the listening
volume level.
Digital Inputs
When a Digital Input (Optical, Coax or AES/EBU
Connection) on the MXA70 is selected the Front Panel
Display will indicate the Sampling Frequency when
a signal is present “48K”. Refer to figure 102. During
the time there is no Digital Signal present the display
will indicate “SILENT”. Refer to figure 103.
INPUT:
30%
OPTICAL
48K
Figure 102
INPUT:
30%
COAX
SILENT
Figure 103
USB Input Operation and Driver Installation
The MXA70 USB Input provides the capability to
playback music from a computer when the MXA70
Rear Panel USB Connector is connected to a computer
USB Connector. Refer to page 11 Connecting Components.
Note: The USB Input is for direct connection to a computer only. To playback music from a USB Drive,
connect the USB Drive to another USB Port on
the computer and select the USB Drive with the
Media Playback Program.
The MXA70 USB Input is compatible with PC
Computers using Microsoft® Windows® Vista (SP2),
Windows 7 (SP1) and Windows 8 (SP1). It is also compatible with Apple® Macintosh® Computers using
OS-10.9 Mavericks or later.
When using a PC Computer with Windows, a special McIntosh USB Audio Software Driver needs to be
installed on the PC Computer. The driver needs to be
installed before connecting the MXA70 USB Input to
the USB Port on the computer.
Note: If an Apple Macintosh computer is used with the
MXA70, no additional driver is required.
The McIntosh USB Audio Windows Driver is
available for download from the McIntosh Web Site:
http://www.mcintoshlabs.com/us/support/Pages/
Manuals.aspx
Under “Products” select “McIntosh MXA70” then
scroll down to the bottom of the McIntosh MXA70
to the “DOWNLOAD AREA”. Select the “McIntosh
MXA70 PC DRIVER SETUP” and download the PC
Windows Driver. Follow the instructions below to
install the McIntosh MXA70 Driver:
Purpose:
To Install the McIntosh USB Audio
Windows
Driver for use with McIntosh MXA70
with an USB-Digital Audio Input.
Requirements:
1. A functioning McIntosh MXA70
with an USB-Digital Audio Input.
2. A PC Computer with a genuine
Intel Main Processor and a
functioning USB Port.
3. Windows Vista (SP2), Windows 7
(SP1 or greater) or Windows
8.1 Operating System.
4. An USB Cable with Type A to
Type B Connectors.
Installing the Software
It is important to first install the downloaded software
on your computer before connecting the McIntosh
MXA70 to the computer. The USB Driver is included
in the downloaded software package.
Note: Before installing this software, please check to see
if the McIntosh MXA70 has the latest firmware version, if not update the firmware first.
1. Unzip the downloaded McIntosh Windows USB
Driver Software Package.
2. Run “McIntosh_USB_driver_._.exe”. Refer to figures 104 and 105.
Figure 104
Figure 105
3. Referring to figure 106, read and then check the
“I accept the terms of the License Agrement” box and
then the Next > button. If desired, choose a Start
Menu Folder. Refer to figure 107.
Figure 106
Figure 107
4. When the Windows Security window appears
click on the “Install” button. Refer to figures 108
thru 111 on the next page.
27
Figure 108
Figure 109
Windows Sound Settings
For proper operation of the McIntosh MXA70 via the
Computer USB Connection, it is required to make
changes to Windows Sound Settings:
1. Click on the “McIntosh ICON” (located in the
Windows notification area on the right side of the
taskbar) or click on the Windows “Show hidden
icons”, then select the “McIntosh ICON”. Refer to
figures 115, 116 and 117.
Figure 118
Figure 115
Figure 119
Figure 110
Figure 111
USB Connection
Connect the USB Cable with Type A to Type B connectors between the PC Computer and the McIntosh
MXA70 with the USB-Digital Audio Input. An Icon
will appear On-Screen indicating Windows has found
new hardware. Refer to figure 112.
Referring to figure
Figure 112
113, check the
Always trust software
from “CEntrance, Inc.”
box and then the Install
button. Upon completion of installing the
driver, figure 114 will
appear.
Figure 117
Figure 113
Figure 114
28
Figure 116
Notes: 1. When the McIntosh USB Audio MXA70 is
not connected to your computer, the previous default Audio Device will be selected.
2. If other McIntosh Product(s) with USB
Audio Connections are also connected to
the computer, an additional “McIntosh
USB Audio” playback device will appear in
the listing. Make sure to select the “McIntosh USB Audio Device” from available
playback devices listed when using this
McIntosh MXA70 for USB Audio.
Note: Some version(s) of Windows might not show
the McIntosh Icon. Click on the “Start” button, select “Control Panel”, then “Sound”.
Proceed to step 3.
2. Right mouse button click to bring up the menu
and then select the “Sound and Audio....”. Refer
to figures 118 and 1119.
3. Select the “Speakers McIntosh USB Audio”
and then click on the SET DEFAULT button.
Refer to figures 120 and 121.
Figure 120
How to Operate the MXA70, con’t
SAMPLE RATE:
The Sample Rate pull down Window indicates the
Sample Rate choices of the connected McIntosh
MXA70. It also communicates the selected choice
of Sampling Rate to the active Windows Playback
Program.
Note: In general, when the original music is recorded
at a higher Sampling Rate, the result is usually
more detail in the music. However, this higher
rate results in consuming larger amounts of storage space. The Sample Rate usually should be set
to match the Sample Rate of the music recording
being played back.
Figure 121
USB Audio Driver Operation
Control Panel Settings
The MXA70 USB Control Panel allows changes to be
made from the default settings. These include Latency,
Sample Rate and Audio Stream Input Output (ASIO)
Control. Refer to figure 122.
Note: It is not necessary for the
McIntosh USB
Control Panel to
be running, unless it is desired
to make changes
to the default
settings.
Figure 122
LATENCY:
The default Latency Setting is chosen for contemporary computers and their performance capabilities.
When the McIntosh USB Audio Driver is installed on
a legacy computer with slower processing speed, it
may occasionally produce clicks/pops in the music. To
resolve this if it occurs, increase the Latency Setting
(increase buffer size).
ASIO HOSTS CAN CHANGE:
There are two choices. When the box is not checked
(default setting), the Sample Rate is determined by
the Sample Rate Setting in the McIntosh USB Control
Panel. It would be an appropriate choice when using a
playback program like Windows Media Player.
If a third party program for music playback is
ASIO compliant then check the box. These programs
allow changing the Sample Rate Setting directly “on
the fly” according to the format of the music being
played back. An example of just one of the available
programs is “JRiver Media
Center”.
ABOUT:
Displays the Driver Version
and Control Panel Version
of the current McIntosh
USB Audio Driver. Refer to
figure 123.
Reset of Microprocessors
In the unlikely event the controls of the MXA70 stop
functioning, the microprocessors can be reset by
performing the following:
1. Press the STANDBY/ON Push-button until the
STANDBY/ON Indicator switches Off.
2. When the MXA70 cycles On then Off, release the
STANDBY/ON Push-button.
3. When the STANDBY/ON LED is illuminated
press the STANDBY/ON Push-button, the MXA70
will resume normal operation.
Note: This can be performed with the MXA70 On or
in the Standby Mode.
Resetting the MXA70 to default settings
If it becomes desirable to reset all the adjustable settings (Setup and Trim Settings) to the factory default
values, perform the following:
1. Press in and hold the INPUT Control and the
VOLUME Control. The Front Panel Display will
indicate “FACTORY RESET”. Refer to figure 124.
FACTORY RESET
Figure 124
2. When the Front Panel Display indicates “FACTORY RESET, COMPLETE” release the two
controls. Refer to figure 125.
FACTORY RESET
-COMPLETEFigure 125
3. Press the STANDBY/ON Push-button and the
MXA70 will resume operation.
Figure 123
29
Amplifier Specifications
Amplifier Specifications
Loudspeaker Power Output
50 watts is the minimum sine wave continuous average
power output per channel, both channels operating
Headphone Power Output
250mWatts - Norm Selection, 1 watt - High Selection
Loudspeaker Output Load Impedance
8 ohms
Headphone Output Load Impedance
8 - 40 ohms, 40 - 150 ohms, 150 - 600 ohms
Rated Power Band
20Hz to 20,000Hz
Total Harmonic Distortion
0.005% maximum with both channels operating from
250 milliwatts to rated power, 20Hz to 20,000Hz
Dynamic Headroom (Loudspeaker)
1.5dB
Frequency Response
+0, -0.5dB from 20Hz to 20,000Hz
+0, -3dB from 10Hz to 100,000Hz
Tone Control
Bass Boost 0 to +12.5dB (2.5dB steps) @ 40Hz
Preamplifier Output (for rated input)
3V (8V Maximun)
Signal To Noise Ratio (A-Weighted)
High Level, 105dB below rated output
Input Impedance
25K ohms unbalanced and balanced
30
Maximum Input Signal
8V unbalanced, 16V balanced
Frequency Response
60Hz - 45kHz
Sensitivity (for rated output)
300mV unbalanced, 600mV balanced
Crossover Frequency
2,000Hz
Intermodulation Distortion
0.005% maximum, if the instantaneous peak power is
100 watts or less per channel with both channels operating for any combination of frequencies from 20Hz to
20,000Hz
Power Handling
75 Watts
Wide Band Damping Factor
Greater than 150
General Specifications
Preamplifier Output Impedance
500 ohms
Power Guard
Less than 2% THD with up to 16dB overdrive at
1,000Hz
Voltage Gain
36.5dB
Digital Input Sample Rates
Optical, Coaxial, AES/EBU: 16Bit, 24Bit - 32 to 192kHz
USB: 16Bit, 24Bit, 32Bit - 32kHz to 192kHz
Power Control
Input: 5-15VDC, < 1mA
Output: 12VDC, 25mA maximum
Loudspeaker Specifications
System Driver Complement
One 4 inch Woofer/Midrange, One 3/4 inch Tweeter
Impedance
8 ohms Nominal
Finish Enclosure and Grille
High Gloss Black, Black Knit Cloth
Power Requirements
Field AC Voltage conversion of the MXA70 is not possible. The MXA70 is factory configured for one of the
following AC Voltages:
100 Volts, 50/60Hz at 1.8 amps
110 Volts, 120 Volts, 50/60Hz at 1.5 amps
220 Volts, 50/60Hz at 0.9 amps
230 Volts, 240 Volts, 50/60Hz at 0.8 amps
Standby: Less than 0.25 watt
Note: Refer to the rear panel of the MXA70 for the correct voltage.
Overall Dimensions
Width is 23-1/4 inches (59.1cm)
Height is 10-7/8 inches (27.6cm) including feet
Depth is 19 inches (48.3cm) including the Front Panel,
Knobs and Cables
Weight
50 pounds (22.6 kg) net, 66 pounds (29.9 kg) in shipping
carton
Shipping Carton Dimensions
Width is 35 inches (88.9cm)
Depth is 20 inches (50.8cm)
Height is 15-1/2 inches (39.4cm)
Packing Instructions
Packing Instructions
In the event it is necessary to repack the equipment for
shipment, the equipment must be packed exactly as
shown below. It is very important that the four plastic
feet are attached to the bottom of the equipment. Failure to do this will result in shipping damage.
Use the original shipping carton and interior parts
only if they are all in good serviceable condition. If
a shipping carton or any of the interior part(s) are
needed, please call or write Customer Service Department of McIntosh Laboratory. Refer to page 3. Please
see the Part List for the correct part numbers.
MXA70 Packing Material List
Quantity
1
4
2
Part Number
034475
034484
034483
Description
Shipping carton
Foam Pads
Slit Score Wrap
1
1
1
1
034548
034558
034557
034559
Electronic inner carton
Left foam end cap
Right foam end cap
Corrugated wrap
4
4
163073
400131
Plastic foot
#10-32 x 1/2 machine screw
2
2
2
310411SP
310409SP
310410SP
Loudspeaker inner carton
Loudspeaker top foam
Loudspeaker bottom foam
CORRUGATED
WRAP
IMPORTANT
(Read Above)
LOUDSPEAKER
TOP FOAM PAD
LOUDSPEAKER
TOP FOAM PAD
LEFT FOAM
END CAP
LOUDSPEAKER
BOTTOM FOAM PAD
LOUDSPEAKER
BOTTOM FOAM PAD
RIGHT FOAM
END CAP
ELECTRONIC
INNER
CARTON
LOUDSPEAKER
INNER CARTON
SLIT
SCORE
WRAP
FOAM
PAD
LOUDSPEAKER
INNER CARTON
SLIT
SCORE
WRAP
FOAM
PAD
ACCESSORY
PACK
FOAM
PAD
FOAM
PAD
ACCESSORY
PACK
SHIPPING
CARTON
31
McIntosh Laboratory, Inc.
2 Chambers Street
Binghamton, NY 13903
www.mcintoshlabs.com
The continuous improvement of its products is the
policy of McIntosh Laboratory Incorporated who
reserve the right to improve design without notice.
Printed in the U.S.A.
McIntosh Part No. 04150100
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