Owners Manual - All Pro Sound

Owners Manual - All Pro Sound
MX-206
Stereo
Microphone Mixer
Operating Manual
Ch.1
5
4
Ch.2
6
3
7
2
Clip 1
L
0
10
R
5
4
8
Input
(dB)
3
Clip 1
Pan
L
0
10
R
5
4
7
2
-20 -40 -60
Le vel
Ch.3
6
8
Input
(dB)
3
Clip 1
Pan
L
0
10
R
5
4
7
2
-20 -40 -60
Le vel
Ch.4
6
8
Input
(dB)
3
Clip 1
Pan
L
0
10
R
5
4
7
2
-20 -40 -60
Le vel
Ch.5
6
8
Input
(dB)
3
Pan
4
7
2
Clip 1
L
0
-20 -40 -60
Le vel
10
R
8
Input
(dB)
Pan
5
6
3
Clip 1
L
-60
0
4
7
2
-20 -40
Level
Ste reo
Aux Input
Ch.6
6
10
R
8
Input
(dB)
5
3
-RMono/Phone s -LClip
Output
Ste reo
Outputs
6
5
4
7
6
4
5
7 3
3
4
6
5
+6
6
7
7
1
9
0
10
1
Pan
Le vel
0
10
Left
MX-206
Ste reo
He adphone s
Stereo
Six Channel
Microphone Mixer
-12
9 1
9
9 1
0
10
0
10
-20 -40 -60
Level
0
-6
2
Right
Mono
Phones
-20
Out put
VU
On
Phantom
Power
ASHLY AUDIO INC.
847 Holt Road Webster, NY 14580-9103 Phone: (716) 872-0010
Toll-Free: (800) 828-6308 Fax: (716) 872-0739 Internet: http://www.ashly.com/
Operating Manual -MX-206 Stereo Microphone Mixer
Table Of Contents
1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3
AC POWER REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
4
CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
5
CONNECTIONS AND CABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
6
TYPICAL APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1 Small Sound Reinforcement System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2 Location Recording or Broadcast Mixing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3 Submixer In Larger Sound System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
6
6
7
7
TROUBLESHOOTING TIPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1 No Sound . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2 Distorted Sound . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.3 Excessive Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.4 Excessive Hum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7
7
7
7
7
8
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
9
DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
10 WARRANTY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
11 SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2
Operating Manual - MX-206 Stereo Microphone Mixer
1. INTRODUCTION
2. UNPACKING
Congratulations on your purchase of an Ashly
MX-206 stereo microphone mixer. In one single-space
rack-mount package we have combined the features, reliability, and sonic performance you have come to expect
from Ashly. This second generation mixer is similar to
the MM-106, except that where the MM-106 had only
one main output, the MX-206 has stereo, mono, and stereo headphone outputs, each with its own level control.
As a part of our system of quality control, every
Ashly product is carefully inspected before leaving the
factory to ensure flawless appearance. After unpacking,
please inspect for any physical damage. Save the shipping carton and all packing materials , as they were carefully designed to reduce to minimum the possibility of
transportation damage should the unit again require packing and shipping. In the event that damage has occurred,
immediately notify your dealer so that a written claim to
cover the damages can be initiated.
Other features include a 20dB input pad on each
channel, switchable +48V phantom power, up to 60dB of
mic preamp gain (84 dB total!), and concentric level and
pan controls on each input channel.
Ultra low-noise summing amplifiers combine the
channel signals for the main outputs. Two 5-segment LED
arrays monitor stereo outputs. Stereo line level outputs
on 1/4" connectors, a transformer isolated 600 ohm mono
output on an XLR connector, and tape/CD inputs and
outputs on RCA connectors come as standard equipment.
Ashly still uses professional quality 16mm metal shaft
potentiometers on all controls for greater accuracy and
long life. Input isolation transformers are not available
on the MX-206.
The right to any claim against a public carrier
can be forfeited if the carrier is not notified promptly and
if the shipping carton and packing materials are not available for inspection by the carrier. Save all packing materials until the claim has been settled.
3. AC POWER REQUIREMENTS
The MX-206 mixer will perform normally from
93 to 125 volts AC, 50-60Hz (some export models are
wired for 240 Volts and are labeled accordingly). Use
only properly grounded AC receptacles. To reduce the
risk of ground loop hum, use a central point for system
AC power distribution. Power consumption is less than
15 watts.
4. CONTROLS (see next page)
4.1 Input dB (Gain)
This 3-position slide switch sets the operating level of the microphone preamp. Best signal
to noise ratio is obtained with higher gain settings, however it is important to leave enough headroom
(20dB) to prevent clipping. The numbers -20, -40, and -60 refer to the nominal level of the microphone signal applied to the input. In other words, more gain is needed for a weak -60dB signal than
for a stronger -20dB signal, so as the switch is pushed further to the right, more gain is applied in the
mic preamp circuit. The center position (-40) is a good starting point for most applications. Note:
The Input Gain switch increases or decreases by 20dB increments. To avoid system feedback and
possible driver or hearing damage, turn down the channel level control before adjusting the gain,
then slowly increase level control to suitable setting.
4.2 Input Level
This inner concentric control determines the mix level of its respective channel. If you have
insufficient signal with the level fully turned up, change the Input dB (gain) switch of that channel to
a higher setting (turn down level first).
4.3 Input Pan
This outer concentric control determines the stereo position of the signal.
4.4 Clip
Each input has a red LED which will illuminate when either the mic preamp or input level
circuit pass a signal which is 3dB below clipping. If the level control is turned off and the LED is still
flashing, reduce the Input dB (gain) switch.
3
Operating Manual -MX-206 Stereo Microphone Mixer
Ch.1
Ch.2
Ch.3
Ch.4
5
5
5
5
4
6
3
7
2
Clip 1
4
L
0
10
R
8
Input
(dB)
6
3
7
2
Clip 1
L
0
10
-20 -40 -60
Level
Pan
4
R
3
8
Input
(dB)
2
Clip 1
Pan
4.5 Stereo Aux Input
This control adjusts the level of the stereo signal
from the RCA inputs on the back panel. The Tape/CD
input should have a nominal level of -10dB.
4.6 Stereo Outputs
The Left and Right output levels are
independantly controlled by these two dials. They respectively determine the signal at the 1/4" jack Main outputs.
4.7 Mono Output
This inner concentric control determines the output level of the transformer-balanced Mono Output XLR
connector. Its signal is summed from the right and left
mix bus, and is fully independant of the settings of the
stereo output level controls.
4
7
L
0
-20 -40 -60
Level
6
10
R
6
3
8
Input
(dB)
2
Clip 1
L
0
10
5
4
7
-20 -40 -60
Level
Ch.5
R
8
Input
(dB)
7
2
Clip 1
L
0
-20 -40 -60
Pan
Level
Pan
6
3
10
R
-20 -40
Level
Pan
4.12 Power Switch
This switch turns on AC power to the mixer, lighting the green LED. If the switch is pressed but the LED
is still off, check to see that the AC power cord is not
detached.
5. CONNECTIONS AND CABLES
The MX-206 mixer is fitted with four types of
audio connectors: 3-pin XLR type male (mono output),
3-pin XLR type female (mic inputs), tip-ring-sleeve (TRS)
phone jacks, and RCA jack. Although using unbalanced
tip-sleeve 1/4" plugs will work in certain applications,
we recommend always using balanced TRS cabling for
the stereo 1/4" jack outputs.
4.8 Headphones Output Level
This outer concentric control determines the level
of the stereo headphones, and is fully independant of the
settings of the stereo and mono output level controls
4.9 Output Meters
Two 6-segment LED arrays show the current status of the stereo outputs. 0VU is equivalent to +4dBu
(1.228Vrms).
4.10 Stereo Headphone Jack
You can monitor the stereo mix through headphones independant of all other output controls. In other
words, the headphones can be used even if all other output controls are turned off.
4.11 Phantom Power Indicator
This red LED is lit when the +48V phantom
power is turned on. The phantom power switch is on the
back panel.
Mono Output
3
1
Model MX-206
Made In USA
Stereo Aux
-L-
2
Stereo
Outputs
(-) (+)
100-120VAC
50-60Hz 15W
4
-RPhantom
Pwr.
Left
Right
Transformer
Balanced
8
Inpu
(dB
Aux
Out
Aux
In
Operating Manual - MX-206 Stereo Microphone Mixer
Stereo
Aux Input
Ch.6
5
4
6
4
7
L
0
10
R
5
6
3
8
Input
(dB)
Stereo
Outputs
4
7
5
6
4
Mono/Phones
Output
5
7 3
3
4
6
5
-L-
+6
6
7
0
7
-6
2
1
9
0
10
1
9 1
0
10
9
0
10
0
Pan
Level
Left
Right
Mono
MX-206
-20
Output
VU
10
Stereo
Six Channel
Microphone Mixer
Stereo
Headphones
-12
9
1
-20 -40 -60
evel
-R-
Clip
On
Phones
Two-conductor (twisted pair) shielded cable is
best for all XLR type connections. Belden No. 8412, or
its equivalent, is an excellent cable due to its heavy construction. This type of cable should be used for all portable applications. Snake cables containing multiple
shielded pairs must be handled very carefully because the
leads tend to be fragile, and a broken conductor is difficult to repair.
If low level and high level lines (e.g., microphones and mixer line outputs), or if either of these lines
and speaker cables are run parallel for long distances,
crosstalk may be significant. In fact, the crosstalk (signal leakage between cables) can cause an electronic feedback loop, oscillation, and possibly damage to the
equipment. To minimize crosstalk, physically separate
low level (microphone) cables from speaker cables by the
greatest feasible distance. At any point where cables meet,
run low level cables perpendicular to high level or speaker
cables. If low and high level or speaker cables must be
run parallel and in close proximity to one another, they
should be bundled separately.
5.1 Microphone Input
The microphone input is an active balanced type
with a nominal impedance of 1200 ohms. Its noise performance is best with a 200 ohm microphone. The Mic
input connector is a standard 3-pin XLR female with the
shield on pin 1, the (+) in-phase connection on pin 2, and
the (-) out-of-phase connection on pin 3.
5.2 Input Pad
The Pad is a 20dB attenuation switch on the rear
panel for use with each XLR microphone input. It should
normally be left in the "out" position for best signal to
Phantom
Power
noise ratio and should only be used when the input is being overdriven with the Input dB (gain) switch at its minimum setting.
5.7 Tape/CD Input - Tape Output
The stereo inputs on RCA connectors have a
nominal operating level of -10dBu to match most tape
decks and CD players. The tape outputs are -10dBu "premaster", so they are not affected by the settings of the
output controls.
5.8 Mono Transformer Balanced Output
The mono transformer output uses a male XLR
type connector and provides total isolation for 600 ohm
lines. Pin 1 is ground, pin 2 is (+), and pin 3 is (-). This
output is controlled by the Mono level, with a nominal
operating level of +4dBu.
Note: The transformer-balanced output is designed to drive up to +24dBu into a 600 ohm load. Because of the nature of an output transformer, the output
level increases as the impedance of the terminating load
becomes higher than 600 ohms. Whereas a "directcoupled" output stage like that of the stereo outputs will
not change as the load changes, any transformer used in
an audio path is affected by its termination impedance.
Since line level inputs on audio devices are typically 10KΩ
or higher, expect a slight increase (2.5dB) in output level
when driving high impedance inputs with the mono transformer output. The output meters will reflect the levels
present on the stereo outputs, regardless of the load on
the transformer output.
5.9 Stereo Outputs
The Stereo Outputs are controlled by the left and
right master. They are 1/4" pseudo-balanced TRS jacks
with a nominal operating level of +4dBu into any load.
Ch.6
Ch.5
Ch.4
Ch.3
Ch.2
Ch.1
PUSH
PUSH
PUSH
PUSH
PUSH
PUSH
Pad
Pad
Pad
Pad
Pad
Pad
(-20dB)
-20dB
(-20dB)
(-20dB)
(-20dB)
(-20dB)
5
Operating Manual -MX-206 Stereo Microphone Mixer
6. TYPICAL APPLICATIONS:
Stereo
Main Speakers
6.1 Small Sound
Reinforcement System:
In the setup shown
here, the MX-206 is used to mix
typical sound sources that
might be found in a small club,
meeting room, school theater or
similar environment. Six input
channels are used for microphones for vocal or instrumental pickup. The Tape/CD In and
Tape Out provide feeds to and
from a cassette deck or other
recording/playback device for
playback of recorded material,
or for making a recording of the
mix. The main PA power amplifiers (or any additional
equalizers or electronic crossovers which may be used) are
fed from the Stereo Output connectors, while a stage or control room monitor is fed from
the Mono Output.
FTX- 1501
Stereo Amplifier
Mono Output
Model MX-206
Made I n USA
Ch.6
Ch.5
Ch.4
Ch.3
Ch.2
-L -
PUSH
PU SH
PUSH
PUSH
PUSH
Phantom
Pwr.
Left
Aux
Out
Transformer
Balanced
Right
-R-
Aux
In
Phantom
Pwr.
Left
Right
PUSH
Pad
Pad
Pad
Pad
Pad
Pad
(-20dB)
-20dB
(-20dB)
(-20dB)
(-20dB)
(-20dB)
FTX- 1501
6.2 Location Recording or
Broadcast Mixing:
Lavalier Condenser Microphones
Ste reo Aux
Ch.6
Ch.5
Ch.4
Ch.3
Ch.2
-L-
PUSH
PUSH
PUSH
PUSH
PUSH
Ch.1
PUSH
Stereo
Outputs
100-120VAC
50-60Hz 15W
Ch.1
Monitor or
Control Room Speaker
Amplifier
Mono Output
Transformer
Balance d
Aux
Out
-R-
Aux
In
Pad
Pad
Pad
Pad
Pad
Pad
(-20dB)
-20dB
(-20dB)
(-20dB)
(-20dB)
(-20dB)
Video, Telephone,
or Press-Box Interface
6
Ste reo Aux
Ste reo
Outputs
100-120VAC
50-60Hz 15W
Cassette Deck For
Stereo Record/Playback
Model MX-206
Made I n USA
Cassette Deck For
Stereo Record/Playback
In this setup the MX-206
is used to mix sources typically
found in location recording or
broadcast situations (mostly microphones). In this case, all six
inputs are microphones, as would
be used in a roundtable panel discussion. The Tape/CD Input receives the output of a cassette
deck or other playback device,
and the Tape Out provides a feed
to a cassette deck or other recording device for making a recording of the mix. For live remote
broadcast applications the transformer-balanced Mono Output
connector can feed a suitable
video, telephone or press-box interface.
Operating Manual - MX-206 Stereo Microphone Mixer
6.3 Submixer In Larger
Sound System:
In this application
the MX-206 is used to upgrade an existing sound system by providing a vocal or
instrumental sub-mix to the
main mixer without tying up
a number of channels on the
main console. This technique allows the system input capacity to be expanded
without installing more buried mic cables and without
changing the mixer that everyone is already comfortable with.
Use the
Headphones Output to
achieve a "pre-mix" before
adjusting the main console.
Sub-Mix of Orchestra, Choir,
Percussion Section,
Area Microphones, etc.
Mono Output
Model MX-206
Made I n USA
Ste reo Aux
Ch.6
Ch.5
Ch.4
Ch.3
Ch.2
-L-
PUSH
PUSH
PUSH
PUSH
PUSH
Ch.1
PUSH
Stereo
Outputs
100-120VAC
50-60Hz 15W
Phantom
Pwr.
Left
Right
Transformer
Balance d
Aux
Out
-R-
Aux
In
Pad
Pad
Pad
Pad
Pad
Pad
(-20dB)
-20dB
(-20dB)
(-20dB)
(-20dB)
(-20dB)
Existing Main Console
7. TROUBLESHOOTING TIPS
7.1 No Sound
Check the AC power. Is the power switch on and
its LED lit? Check the level meters. If they are operating, the problem is between the mixer and the later components in the system. If there is no meter activity, check
to see you really have an input signal and that it is on the
desired channel. Check that you have the master gain
controls at the desired operating level.
7.2 Distorted Sound
Something is being overdriven in the signal path.
If the clip indicators are active, reduce the channel gain
control and/or press in the pad switch on the rear panel.
If the output level meters are constantly in the red, reduce the Master gain and increase the gain of components following the mixer. There are many gain
adjustments in the mixer itself and probably several others in other system components which makes it possible
to overdrive an input section and then incorrectly try to
reduce the gain of the output section. The best way to
approach setting gains is to establish the operating level
of input stages first by setting their gain as high as possible but leaving about 20dB of headroom for loud peaks,
then move on to set the master gain to produce a good
meter reading. Proceed to set the gain of equalizers, limiters, crossovers, and amplifiers following the mixer in
the same manner, always working toward the later stages
of the system.
7.3 Excessive Noise
If the noise is in the form of hiss, the problem is
usually due to an input stage set up for low gain and then
compensating by increasing the master gain. Check that
the Pad switch is not enabled unnecessarily. Turn up the
channel gain controls and reduce the master gain.
7.4 Excessive hum
This is usually caused by "ground loops" in the
system wiring. A complex sound system with many
sources separated by significant distance and using several power outlets has many opportunities for this problem to occur. If possible, feed everything in the system
from one power source with a common ground. Use balanced input and output connections between widely separated components.
If you need help, get in touch with your Ashly
dealer or call an Ashly technical service representative at
1-800-828-6308 ext. 125.
7
Operating Manual -MX-206 Stereo Microphone Mixer
8. SPECIFICATIONS
DISTORTION
THD at +20 dBu, 20Hz-20KHz, input switch at -40dB<0.05%
IMD (SMPTE) at +20dBu, input switch at -40dB . . . <0.02%
HUM & NOISE (20Hz-20KHz, input switch at -60dB)
equivalent input hum and noise . . . . . . . . . . . . . . . . . <-129dBu
residual output noise, TRS outputs,
all levels at minimum . . . . . . . . . . . . . . . . . . . . . . . . . <-100dBu
residual output noise, XLR outputs, . . . . . . . . . . . . . . <-90dBu
Master Level at nominal,
all Ch. Level controls at min . . . . . . . . . . . . . . . . . . . . <-84dBu
Master Level and one Ch. Level at nom. . . . . . . . . . . <-67dBu
MAXIMUM VOLTAGE GAIN (±2dB)
Mic Input to Master Output, 600 ohm load . . . . . . . . . . . 84dB
Aux In to Master Output . . . . . . . . . . . . . . . . . . . . . . . . . . . 34dB
FREQUENCY RESPONSE
20Hz-20KHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +0/-0.5dB
CROSSTALK
Between any inputs or outputs
20Hz-20KHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <-60dB
VU METERS
Two 5-segment LED meters . . . . . . . . . . . . . . . . 0VU = +4dBu
PEAK INDICATORS
Peak Clip indicator on each input channel and left and right
outputs, illuminates 3dB below clipping
PHANTOM POWER
+48 VDC applied to all Mic Inputs, switchable on front panel.
Maximum total current draw = 80mA. Maximum single channel current draw = 14mA. Gradual power-up and down to eliminate "pops".
SHIPPING WEIGHT
10 lbs. maximum
POWER REQUIREMENTS
120 VAC nominal, 93 VAC minimum, 50-60 Hz,
17 watts (240 VAC available)
*unless otherwise stated, specification conditions are:
150Ω source, Input set at "-60", all other controls set at
nominal, XLR output into 600Ω or greater.
9. DIMENSIONS:
1.15
0.10
1.75
1.25
6.00
17.00
Figure 9.1: Dimensional Drawing for MX-206 Mic Mixer
8
Operating Manual - MX-206 Stereo Microphone Mixer
10. WARRANTY INFORMATION
Thank you for your expression of confidence in Ashly products. The unit you have just purchased is protected
by a five-year warranty. To establish the warranty, be sure to fill out and mail the warranty card attached to your
product. Fill out the information below for your records.
Model Number _______________________________________________________________________________
Serial Number ________________________________________________________________________________
Dealer ______________________________________________________________________________________
Date of Purchase _____________________________________________________________________________
Dealer’s Address ______________________________________________________________________________
Dealer’s Phone _______________________________________________________________________________
Salesperson __________________________________________________________________________________
11. SCHEMATIC DIAGRAM
9
Schematic Diagram: MX-206 Stereo Microphone Mixwe
Operating Manual -MX-206 Stereo Microphone Mixer
10
Operating Manual - MX-206 Stereo Microphone Mixer
11
Operating Manual - MX-206 Stereo Microphone Mixer
ASHLY AUDIO INC. 847 Holt Road Webster, NY 14580-9103
Phone: (716) 872-0010 Fax: (716) 872-0739
Toll Free (800) 828-6308
Internet: http://www.ashly.com/
 1996 by Ashly Audio Corporation. All rights reserved worldwide.
Printed in USA 6/96
MX206Rev 0
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