User`s Manual
User's Manual
S-8
8-CHANNEL MIXING CONSOLE
R
LTO
www.altoproaudio.com
Version 2.3 August 2005
English
Fuse
SAFETY RELATED SYMBOLS
To prevent fire and damage to the product, use only
the recommended fuse type as indicated in this
manual. Do not short-circuit the fuse holder. Before
replacing the fuse, make sure that the product is
OFF and disconnected from the AC outlet.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
This symbol, wherever used, alerts you to the presence of un-insulated and dangerous voltages within the product enclosure. These are voltages that
may be sufficient to constitute the risk of electric
shock or death.
Protective Ground
Before turning the product ON, make sure that it is
connected to Ground. This is to prevent the risk of
electric shock.
This symbol, wherever used, alerts you to important operating and maintenance instructions.
Please read.
Never cut internal or external Ground wires. Likewise,
never remove Ground wiring from the Protective
Ground Terminal.
Protective Ground Terminal
Operating Conditions
AC mains (Alternating Current)
Always install in accordance with the manufacturer's
instructions.
Hazardous Live Terminal
ON:
To avoid the risk of electric shock and damage, do
not subject this product to any liquid/rain or moisture.
Do not use this product when in close proximity to
water.
Denotes the product is turned on.
OFF: Denotes the product is turned off.
WARNING
Do not install this product near any direct heat source.
Describes precautions that should be observed to
prevent the possibility of death or injury to the user.
Do not block areas of ventilation. Failure to do so
could result in fire.
CAUTION
Keep product away from naked flames.
Describes precautions that should be observed to
prevent damage to the product.
IMPORTANT SAFETY INSTRUCTIONS
Read these instructions
Disposing of this product should not be
placed in municipal waste and should be
Separate collection.
Follow all instructions
Keep these instructions. Do not discard.
Heed all warnings.
WARNING
Only use attachments/accessories specified by the
manufacturer.
Power Supply
Ensure that the mains source voltage (AC outlet)
matches the voltage rating of the product. Failure
to do so could result in damage to the product and
possibly the user.
Power Cord and Plug
Do not tamper with the power cord or plug. These are
designed for your safety.
Unplug the product before electrical storms occur
and when unused for long periods of time to reduce
the risk of electric shock or fire.
Do not remove Ground connections!
External Connection
Protect the power cord and plug from any physical
stress to avoid risk of electric shock.
If the plug does not fit your AC outlet seek advice from
a qualified electrician.
Always use proper ready-made insulated mains
cabling (power cord). Failure to do so could result
in shock/death or fire. If in doubt, seek advice from
a registered electrician.
Do not place heavy objects on the power cord. This
could cause electric shock or fire.
Cleaning
When required, either blow off dust from the product
or use a dry cloth.
Do Not Remove Any Covers
Within the product are areas where high voltages
may present. To reduce the risk of electric shock do
not remove any covers unless the AC mains power
cord is removed.
Do not use any solvents such as Benzol or Alcohol.
For safety, keep product clean and free from dust.
Servicing
Covers should be removed by qualified service
personnel only.
No user serviceable parts inside.
Refer all servicing to qualified service personnel only.
Do not perform any servicing other than those instructions contained within the User's Manual.
1
PREFACE
Dear Customer:
Thank you for choosing the
endeavours.
For the
LTO S-8 8-Channel Mixing Console, which is the result of our
LTO AUDIO TEAM's
LTO AUDIO TEAM, music and audio is more than a profession, it is a passion and an obsession!
We have, in fact, been designing professional audio products for a number of years in cooperation with many of the
world's major brands.
The LTO line represents unparalleled analogue and digital products made by musicians, for musicians. With our
design centres in Italy, the Netherlands, and the United Kingdom we provide you with world-class designs, while our
software development teams continue to develop an impressive range of audio specific algorithms.
By purchasing our LTO products you become the most important member of our LTO AUDIO TEAM. We would
like to share with you our passion for what we design and invite you to make suggestions, which will aid us in developIng future products for you. We guarantee you our commitment for quality, continual research and development,
and of course the best prices.
The LTO S-8 is an extremely flexible, ultra-low noise 8-channel console, configured with 4 mono and 2 stereo input
channels, each channel is equipped with a variety of key features including a warm, natural sounding EQ, Peak LEDs
and PAN/BAL control etc..
We would like to thank all the people who made the LTO S-8 8-Channel Mixing Console possible, especially to our
designers and LTO staff. It is their passion for music and professional audio that has made it possible for us to offer
you, our most important team member, our continued support.
Thank you very much
LTO AUDIO TEAM
2
TABLE OF CONTENTS
1.INTRODUCTION.........................................................................................................................................................4
2.FEATURES.................................................................................................................................................................5
3.READY TO START?....................................................................................................................................................6
4.CONTROL ELEMENTS.............................................................................................................................................7
4.1
The mono MIC/LINE channels.......................................................................................................................8
4.2
INPUT LEVEL setting...................................................................................................................................8
4.3
LOW CUT FILTER.........................................................................................................................................8
4.4
STEREO INPUT ............................................................................................................................................9
4.5
The 3 BANDS EQUALISER...........................................................................................................................9
4.6
AUX SENDS.................................................................................................................................................10
4.7
PAN...............................................................................................................................................................10
4.8
PEAK............................................................................................................................................................10
4.9
LEVEL...........................................................................................................................................................10
4.10 INSERT.........................................................................................................................................................10
4.11 MASTER SECTION ....................................................................................................................................11
-MAIN MIX LEVEL
-LED METER
-2 TRACK signal path
-AUX RETURN
-PHONES/CONTROL ROOM
-PHANTOM
-POWER
-2-TRACK IN/OUT
-STEREO AUX RETURN
-AUX SEND 1 and 2
-PHONES
4.12 REAR PANEL DESCRIPTION.....................................................................................................................13
-POWER
-PHANTOM
-AC INLET WITH FUSE HOLDER
-MAIN MIX OUTPUT
-CONTROL ROOM OUTPUT
5.INSTALLATION AND CONNECTION..........................................................................................................................14
6.FOR THE EXPERTS WHO WANT TO KNOW MORE................................................................................................17
7.SYSTEM BLOCK DIAGRAMS..................................................................................................................................18
8.TECHNICAL SPECIFICATION...................................................................................................................................19
9.WARRANTY................................................................................................................................................................20
3
1. INTRODUCTION
Your S-8 is a 8-channel mixer and it is one of the most popular compact mixing consoles in the world. In fact it has
been sold already in terms of thousands of units worldwide. Despite its compact dimensions, great performances and
sound quality are insured thanks to the specification of the components used and the building quality.
Your S-8 is packed with features that can not be found in other consoles of its size: 5 Mono (these are provided with
Ultra Low Noise microphone preamplifiers and Phantom Power at +48 Volt) and 2 stereo input channels are provided,
and each of them is provided with a 3 bands graphic equaliser for LOW, MID and HI controls, as well as 2 Auxiliary
Bus. There is even a stereo input available to be assigned directly to the main MIX or to the other outputs: Control
Room and Headphone. So, in total you have 14 inputs on you S-8.
Your S-8 is very easy to operate but we advise you to go through each Section of this Manual carefully. In this way
you will get the best out of your S-8.
4
2. FEATURES
Your S-8 is provided with 4 mono Line/Mic input, 1 stereo Line/Mic input and an additional stereo Line input to be used
with keyboards, Midi Instruments, etc. We have even included a 2-track input/output for recording and playback. Ultra
low noise microphone preamplifiers, 3 bands eq on all input channels, pre and post Auxiliary bus and phantom power
complete the picture.
5 Input for Microphone and line provided with balanced 1/4" jack and XLR. Channel 5 features stereo Line input
1 additional input for Line level signal provided with balanced TRS 1/4" jacks
The Microphone preamplifiers are Ultra Low Noise and are provided with +48 Volt Phantom Power
Precise 3 bands graphic equaliser (LOW, MID and HI) on each input channel
Pre-fader and post-fader Auxiliary bus
Single Led indicating signal Peaks on each input channel
Low-cut filter on all mono MIC channels
2-track input featuring RCA sockets assignable alternatively to each output group
12 Segments Led Meter for optimum reading of the output signal
Main Output and Control Room outputs are unbalanced type
5
3. READY TO START?
3.1 Please check the AC Voltage available in your Country before connecting your S-8 to the AC socket.
3.2 Be sure that the main power switch is turned off before connecting the Mixer to the AC socket. Also, you should
make sure that all Input and Output Controls are turned down. This will avoid damages to your speakers and avoid
excessive noise.
3.3 Before turning on the S-8 you shall connect it to a power amplifier and turn-on the mixer BEFORE the power amplifier. Once you have finished your working session you shall turn the mixer off AFTER the power amplifier.
3.4 Before disconnecting the S-8 always turn-off the Power switch.
3.5 Do not use solvents to clean your S-8. A dry and clean cloth will be OK.
6
4. CONTROL ELEMENTS
MIC 2
MIC 1
MIC 3
STEREO AUX RETURN
MIC 4
LEFT(MONO)
2-TRACK IN/OUT
AUX SEND
RIGHT
1
1
L
2
1
2
3
1
2
3
1
2
3
LTO
LEFT
3
2
R
TAPE IN
BAL OR
UNBAL
BAL OR
UNBAL
BAL OR
UNBAL
LINE IN 1
LINE IN 2
LINE IN 3
LINE IN 4
TRIM
TRIM
TRIM
TRIM
S-8
RIGHT
2
BAL OR
UNBAL
R
8-CHANNEL MIXING CONSOLE
1
2
LINE IN 5/6
LINE IN 7/8
LEFT(MONO)
LEFT (MONO)
RIGHT
RIGHT
TAPE OUT
1
3
MIC (MONO)
-40dB LINE
60dB MIC
LOW CUT
75Hz
18dB/Oct
-15
+10dB
0dB
TRIM
-40dB LINE
60dB MIC
LOW CUT
75Hz
18dB/Oct
LOW CUT
75Hz
18dB/Oct
0dB
EQ
EQ
EQ
EQ
EQ
EQ
HI
12kHz
HI
12kHz
HI
12kHz
HI
12kHz
HI
12kHz
+15
-15
+15
-15
+15
MID
2.5kHz
+12
-12
-15
+15
MID
2.5kHz
+12
-12
-12
-15
+15
-12
-15
-15
1
-
+15
-12
+12
LOW
80Hz
+15
2
AUX
1
AUX
PRE
1
AUX
PRE
1
AUX
LOW
80Hz
+15
PRE
1
-15
AUX
PRE
1
CLIP
AUX
10
PRE
7
PRE
PAN
-
+15
PAN
-
+15
PAN
+15
2
2
POST
(PRE)
-
8
8
+15
POST
(PRE)
-
+15
PAN
0
POST
(PRE)
-
8
+15
-
2
8
-
+15
POST
(PRE)
8
+15
-
2
POST
(PRE)
8
8
POST
(PRE)
-
+15
8
-
2
8
+15
2
8
-
8
8
+15
-2
-4
+15
BAL
-7
BAL
-10
-20
-30
1
-
+15
LEVEL
2
LEFT
RIGHT
PEAK
-
+15
LEVEL
3
LEFT
RIGHT
PEAK
4-
+15
LEVEL
4
LEFT
RIGHT
PEAK
-
+15
LEVEL
5/6
PEAK
-
+15
LEVEL
7/8
7
OUTPUT LEVEL
-
8
+15
LEVEL
RIGHT
PEAK
8
-
8
PEAK
LEFT
8
RIGHT
8
LEFT
8
RIGHT
8
LEFT
PHANTOM
2TK TO MIX
+15
4
-
2
+15
POWER
EFX TO AUX1
L
1
AUX RETURN
+15
MAX
PHONES /
CONTROL
ROOM
-
MID
2.5kHz
+12
LOW
80Hz
+15
-15
MID
2.5kHz
+12
LOW
80Hz
+15
-15
MID
2.5kHz
+12
LOW
80Hz
+15
-15
PHONES
60dB MIC
HI
12kHz
LOW
80Hz
-15
-40dB LINE
60dB MIC
LOW CUT
75Hz
18dB/Oct
MID
2.5kHz
-12
+10dB
0dB
8
+10dB
0dB
8
-40dB LINE
60dB MIC
8
+10dB
0dB
+15
MAIN MIX
LEVEL
R
2TK TO
CONTROL ROOM
4. CONTROL ELEMENTS
1
4.1 The mono MIC/LINE channels
These are Channel 1 through Channel 4. You can connect balanced, low impedance microphones to the XLR socket. On the 1/4" phone jack you can
connect either a microphone or a line level instrument. You shall never connect
an unbalanced microphone to the XLR socket if you do not want to damage
both the Microphone and the Mixer.
MIC 1
2
1
3
48 Volt phantom power
4
1
It is available only to the XLR Mic sockets. Never plug in a microphone when
phantom power is already on. Before turning phantom power on, make sure
that all faders are all the way down. In this way you will protect your Stage
Monitors and Main Loudspeakers.
BAL OR
UNBAL
LINE IN 1
TRIM
2
+15dB
0dB
2
4.2 INPUT LEVEL setting
-45dB LINE
60dB MIC
LOW CUT
75Hz
18dB/Oct
This Control is provided with 2 different indication rings: One is
for the Microphone and the other for the Line levels. When you
use a microphone you shall read the OUTSIDE ring (0-60 dB),
When you use a Line level instrument you shall read the INSIDE
ring (+15~-45 dB). For optimum operation you shall set this control
in a way that the peak LED will blink also occasionally in order to
avoid distortion on the input channel.
3
POWER
PHANTOM
ON
4
OFF
4.3 LOW-CUT FILTER
3
By pressing this button you will activate a 75 Hz low frequency filter with a slope of 18 dB per octave. You can use
this function to reduce hum and stage rumble when using microphones.
8
5
4.4 STEREO INPUTS
These are Channel 5 through 8. They are organised
in stereo pair (5&6 pair also features XLR Mic Input)
and they are provided with 1/4" TRS phone sockets.
LINE IN 5/6
2
LINE IN 7/8
1
5
3
If you connect only the left jack, the input will operate
in mono mode.
LEFT(MONO)
LEFT (MONO)
RIGHT
RIGHT
MIC (MONO)
TRIM
0dB
60dB MIC
4.5 The 3 BANDS EQUALISER
A 3-band equaliser is provided for all input channels with a wide
range of frequency adjustment.
6
-15
This is the Treble control. You can use it to get rid of high frequency
noises or to boost the sound of cymbals or the high harmonics of
the human voice. The gain range goes from -15dB to +15dB with
a center frequency of 12 kHz.
4.5.2 MID
-12
7
-15
This is the Midrange control. It can affect most fundamental frequencies of all musical instruments and human voice. An attentive
use of this control will give you and very wide panorama of sound
effects. The gain range goes from -12dB to +12dB and the center
frequency is 2.5 kHz.
HI
12kHz
6
MID
2.5kHz
7
LOW
80Hz
8
+15
+12
+15
1
AUX
PRE
-
8
4.5.1 HI
EQ
+15
2
4.5.3 LOW
8
-
8
POST
(PRE)
+15
This is the Bass control. Boost male voice or kickdrum and bass
guitar. Your system will sound much bigger than what it is. The gain
range goes from -15dB to +15dB and the center frequency is 80 Hz.
PAN
LEFT
RIGHT
-
9
8
PEAK
+15
LEVEL
9
4.6 AUX SENDS
These two controls will send the audio signal out to Auxiliary busses.
AUX 1 is configured as PRE-FADER. It means that the signal is sent
out before reaching the main Fader. This will be used for stage monitors.
AUX 2 is configured as POST-FADER; therefore, the audio signal will
be affected by the Main Channel Fader. This will be used for effects
and sound processors. However, Aux 2 can also be configured as
Pre-Fader through any internal modification. (Please see "MODIFICATIONS" later in this Manual.)
EQ
HI
12kHz
-15
+15
MID
2.5kHz
-12
10
This is the PANORAMA control, or balance control. You can adjust
the stereo image of the signal via this Control. Keep this control in
center position and your signal will be positioned in the middle of
stage. Turn this control fully counterclockwise and the signal will be
present only on the left speaker and vice-versa. Of course a wide
number of intermediate positions is available.
+12
LOW
80Hz
-15
+15
1
AUX
PRE
-
8
4.7 PAN
9
+15
2
POST
(PRE)
11
Inside your S-8 the audio signal is monitored in several different stages
and then sent to the PEAK Led. When this Led blinks, it warns you
that you are reaching signal saturation and possible distortion. The
PEAK Led will blink with a level that is 6dB before actual clipping.
-
8
4.8 PEAK
PAN
10
LEFT
4.9 LEVEL
+15
RIGHT
11
12
PEAK
This Control will adjust the overall level of this channel and set the
amount of signal sent to the Main output.
4.10 INSERT
8
12
-
+15
LEVEL
13
Insert points are provided for the Mono Mic Channels. When you
insert a jack in the insert socket, the signal will be taken out after the
Input Gain Control (Trim), sent to an external processor such a compressor-limiter, and returned into the channel strip immediately before
the EQ section. Of course, these jacks used must be stereo (Tip Send/
Ring Return).
CHANNEL INSERT
(PRE-FADER/PRE-EQ TIP SEND/RING RETURN)
CH4
CH3
CH2
13
10
CH1
4.11 MASTER SECTION
14
- MAIN MIX LEVEL
This Control sets the amount of signal sent either to the Main Out socket or to the Tape Output.
15
- LED METER
This stereo 12 segments Led Meter will indicate the level of the overall output signal.
16
17
If you push down the 2TK TO CONTROL ROOM
button, the 2 TRACK IN signal will be routed into
the Control Room output and the level will be adjusted in level by the Control Room knob.
2
1
If you push down the 2TR TO MIX button, the 2
TRACK IN signal will be routed into the MAIN
output and will be adjusted in level by the MAIN
MIX LEVEL knob.
AUX RETURN
8
+15
POWER
EFX TO AUX1
CLIP
MAX
PHONES /
CONTROL
ROOM
-
2TK TO
CONTROL ROOM
20
16
PHANTOM
2TK TO MIX
L
+15
8
18
-
8
- 2 TRACK signal path
R
19
10
- AUX RETURN
7
17
4
The Auxiliary Return 1 and 2 are in fact two additional stereo Line inputs.
2
0
-2
15
-4
AUX RETURN 1 is configured to be assigned
permanently to the Main Mix. (It operates in Mono
Mode if you connect only the left jack).
-7
-10
-20
-30
OUTPUT LEVEL
-
8
The EFX TO AUX1 button is used to swtich the
signal from AUX RETURN 2 between MAIN MIX
and AUX SEND 1.
+15
MAIN MIX
LEVEL
If a signal is routed to AUX RETURN 1 and no
signal is connected to AUX RETURN 2, depressing
the EFX TO AUX 1 will route the signal to AUX
SEND 1, which level will be controlled by AUX
RETURN 2.
14
Without doubt, this feature will be very useful for
you.
- PHONES/CONTROL ROOM
18
This Control sets the amount of signal sent to the Control Room and headphone.
- PHANTOM
19
This LED indicates when the Phantom Power is switched on.
- POWER
20
This LED indicates when the Power is on in your S-8.
11
23
STEREO AUX RETURN
LEFT(MONO)
2-TRACK IN/OUT
AUX SEND
RIGHT
1
1
L
22
LEFT
21
RIGHT
2
2
R
TAPE IN
TAPE OUT
21
- 2-TRACK IN/OUT
Input
Use the Tape input if you wish to listen to your Mix from a Taper Recorder or DAT, You can assign the signal coming
form the Taper Recorder either to a pair of studio monitor using the Control Room assignment on the front panel or
you can also send the signal directly to the Main Mix.
Output
These 1/4" TRS sockets will route the main mix into a tape recorder.
22
- STEREO AUX RETURN
Use these stereo 1/4" phone socket to return the sound of an effect unit or sound processor to the Main Mix.
Alternatively you can use them as an extra auxiliary input.
- AUX SEND 1 and 2
23
These 1/4" phone sockets are used to send out the signal from the AUX Bus to external devices such as effects
and sound processors.
- PHONES
24
This socket will send out the signal mix to a pair of headphones.
PHONES
24
12
4.12 REAR PANEL DESCRIPTION
25
4
POWER
PHANTOM
CAUTION
CAUTION:
ON
RISK OF ELECTRIC SHOCK
DO NOT OPEN
REPLACE WITH THE SAME TYPE FUSE AND RATING
DISCONNECT SUPPLY CORD BEFORE CHANGING FUSE WARNING: SHOCK HAZARD - DO NOT OPEN
AVIS: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR
OFF
MAIN MIX OUTPUT
(BAL/UNBAL)
RIGHT
Use only with a 250V fuse
2
CONTROL
ROOM OUTPUT
LEFT
1
2
3
1
LEFT
LEFT
RIGHT
RIGHT
3
AC INPUT
EUROPE
210-240V 50Hz
Fuse:T250mAL
RATED POWER CONSUMPTION: 18W
26
- POWER
UK / Aust
240V
50Hz
Fuse:T250mAL
USA / Canada
100-120V
60Hz
Fuse:T500mAL
27
28
25
This switch is used to turn the Main Power ON and OFF.
- PHANTOM
4
This switch will apply +48 Volt Phantom Power only to the 5 XLR microphone inputs. Never connect microphones
when the Phantom Power is on already.
26
- AC INLET WITH FUSE HOLDER
Use it to connect your S-8 to the Main AC with the supplied AC cord. Please check the Voltage available in your
Country and make sure the voltage is identical to the values marking on the product. Replace the fuse with the
same type by the qualified personnel only
- MAIN MIX OUTPUT
27
This stereo output is supplied both with XLR and 1/4" jack socket and it is controlled by the Main Mix Level on
the front panel. It will send the audio signal to an amplifier. The output level can be varied from - to +15dB.
- CONTROL ROOM OUTPUT
28
These 1/4" phone sockets will be used to send the signal to Studio Monitor speakers or to a second set of PA.
13
5. INSTALLATION AND CONNECTION
Ok, you have got to this point you are now in the position to successfully operate your S-8. However, we advise you
to read carefully the following section to be the real Master of your own Mix. Not paying attention enough to the Input
signal level, to the routing of the signal and the assignment of the signal will result in unwanted distortion, a corrupted
signal or no sound at all. So you should follow this procedure for every single channel:
Turn down all Input and Output Gain Controls.
Connect phantom powered microphones before switching on the +48Volt Phantom Power switch.
If you have a power amplifier connected to your S-8 set the Level of the amplifier at no more than 70%.
Now, set the CONTROL ROOM/PHONES level at no more than 50%. In this way you will be able to hear later
what you are doing connecting a pair of headphones or a pair of powered studio monitor speakers.
Position HI, MID and LOW eq controls on middle position.
Position panoramic (PAN) control on center position.
With a headphone or studio monitor speakers connected apply a Line Level input signal so that the PEAK Led
does not light up.
At this point increase the input gain so that the PEAK led will blink occasionally. In this way you will maintain
good headroom and ideal dynamic range.
Now connect a microphone and ask the singer to sing loud into the microphone. Turn slowly the Gain Control
clockwise and have the PEAK Led blink only occasionally.
Now repeat the same sequence for all input channels. The Main Led Meter could move up into the red section.
In this case you can adjust the overall output level through the MAIN MIX control.
14
5.1 SOME FINAL TIPS ON WIRING CONFIGURATION
You can connect unbalanced equipment to balanced inputs and outputs. Simply follow these schematics.
Ring=Right Signal
Tip
Sleeve
Ring
Strain Clamp
Tip=Left Signal
Sleeve=Ground/Screen
Use for Headphone, Stereo Return
1/4" Stereo (TRS) Jack Plug
Sleeve
Tip
Tip=Signal
Strain Clamp
Sleeve=Ground/Screen
Use for Mono Line In, Mono 1/4"Jack Plugs
1/4" Mono (TS) Jack Plug
Sleeve
Ring=Return Signal
Tip
Ring
Strain Clamp
Tip=Send Signal
Sleeve=Ground/Screen
Use for Pre-Gain Channel Inserts
1/4" Stereo (TRS) Jack Plug
2=Hot(+)
2
1
3
2=Hot(+)
1=Ground/Screen
3=Cold(-)
2
1
3
1=Ground/Screen
3=Cold(-)
Use for Balanced Mic Inputs
(For unbalanced use, connect pin 1 to 3)
Use for Main output
(For unbalanced use, leave pin 3 unconnected)
3-pin XLR Male Plug
3-pin XLR Line Socket
(seen from soldering side)
(seen from soldering side)
15
Ring=Return Signal (Connected together)
To Channel Insert
Sleeve=Ground/Screen
Tip=Signal
To Tape or FX Input
Sleeve=Ground/Screen
'Tapped' Connection Direct Output Lead
(Enables the Insert to be used as a Direct Output
while maintaining the channel signal flow)
To Processor Input
Sleeve=Ground/Screen
Tip=Send Signal
Tip
To Channel Insert
Sleeve
Ring
Ring=Return Signal
To Processor Output
-Stereo lead for insert Connection
(To be used when the processor does not employ a
single jack connection for the In/Out Connections)
16
6. FOR THE EXPERTS WHO WANT TO KNOW MORE
As we have told you previously in this Manual, the Aux Send 2 Control both on Mono and stereo channels is factory
wired as POST-FADER. If you have some skill in electronic components soldering you can modify this setting and have
all your AUX sends configured as PRE-FADER.
Aux
Aux
(PRE)
POST
(PRE)
Disconnect
the POST route
Solder the PRE route
POST
Before
After
Modification on mono and stereo channels
17
7. SYSTEM BLOCK DIAGRAMS
18
8. TECHNICAL SPECIFICATION
Mono input channels
Microphone input
Frequency response
Distortion (THD & N)
Gain range
SNR (Signal to Noise Ratio)
Line input
Frequency response
Distortion (THD & N)
Sensitivity range
115dB
electronically balanced
10Hz to 55kHz, + 3dB
0.005% at + 4dBu, 1kHz
+15dBu to 45dBu
Line input
Frequency response
Distortion (THD & N)
Balanced
10Hz to 55kHz, + 3dB
0.005% at +4dBu, 1kHz
Microphone input
Channel Insert return
All other inputs
Tape out
All other output
1.4kOhm
2.5kOhm
10kOhm or greater
Hi shelving
Low Cut filter
+ 15dB @12kHz
+ 12dB @2.5kHz
+ 15dB @80Hz
75Hz, 18dB/oct.
Noise (Bus noise)
Fader 0 dB, channels muted:
electronically balanced, discrete input configuration
10Hz to 55kHz, + 3dB
0.005% at + 4dBu, 1kHz
0dB to 60dB (MIC)
Stereo input channels
Impedances
1kOhm
120Ohm
Equalization
Mid bell
Low shelving
Main Mix Section
100dBr (ref.:+4dBu)
Fader 0dB, all input channels assigned
and set to UNITY gain: 90dBr (ref.:+4dBu)
+22dBu balanced XLR,
+22dBu unbalanced, 1/4" jacks
Max output
AUX Return gain range
- to +15dB
+22dBu
AUX Sends max out
Power supply
USA/Canada
100 120V~, 60Hz
Europe
210 240V~, 50Hz
U.K./Australia
240V~, 50Hz
18W
100 120V~ : T500mAL
210 240V~ : T250mAL
Standard IEC receptacle
Main voltage
Power Consumption
Fuse
Main connection
Physical
Dimension (W D
Net weight
Shipping weight
245mm 268mm 24/73mm (9.64" 10.54" 0.94"/2.87")
2.4Kg (5.29lb)
3.5Kg (7.72lb)
H)
19
9. WARRANTY
1. WARRANTY REGISTRATION CARD
To obtain Warranty Service, the buyer should first fill out and return the enclosed Warranty Registration Card within
10 days of the Purchase Date.
All the information presented in this Warranty Registration Card gives the manufacturer a better understanding of
the sales status, so as to purport a more effective and efficient after-sales warranty service.
Please fill out all the information carefully and genuinely, miswriting or absence of this card will void your warranty
service.
2. RETURN NOTICE
2.1 In case of return for any warranty service, please make sure that the product is well packed in its original shipping
carton, and it can protect your unit from any other extra damage.
2.2 Please provide a copy of your sales receipt or other proof of purchase with the returned machine, and give detail
information about your return address and contact telephone number.
2.3 A brief description of the defect will be appreciated.
2.4 Please prepay all the costs involved in the return shipping, handling and insurance.
3. TERMS AND CONDITIONS
3.1
LTO warrants that this product will be free from any defects in materials and/or workmanship for a period
of 1 year from the purchase date if you have completed the Warranty Registration Card in time.
3.2 The warranty service is only available to the original consumer, who purchased this product directly from the
retail dealer, and it can not be transferred.
3.3 During the warranty service, LTO may repair or replace this product at its own option at no charge to you for
parts or for labor in accordance with the right side of this limited warranty.
3.4 This warranty does not apply to the damages to this product that occurred as the following conditions:
Instead of operating in accordance with the user's manual thoroughly, any abuse or misuse of this product.
Normal tear and wear.
The product has been altered or modified in any way.
Damage which may have been caused either directly or indirectly by another product / force / etc.
Abnormal service or repairing by anyone other than the qualified personnel or technician.
And in such cases, all the expenses will be charged to the buyer.
3.5 In no event shall LTO be liable for any incidental or consequential damages. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above exclusion or limitation may not apply to you.
3.6 This warranty gives you the specific rights, and these rights are compatible with the state laws, you may also
have other statutory rights that may vary from state to state.
20
SEIKAKU TECHNICAL GROUP LIMITED
SEKAKU ELECTRON INDUSTRY CO., LTD.
No. 1, Lane 17, Sec. 2, Han Shi West Road, Taichung 40151, Taiwan
http://www.altoproaudio.com Tel: 886-4-22313737
email: [email protected] Fax: 886-4-22346757
All rights reserved to ALTO. All features and content might be changed
without prior notice. Any photocopy, translation, or reproduction of part of this
manual without written permission is forbidden. Copyright c 2005 SEIKAKU GROUP
NF 00976-2.3
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