Sound LAB G742BB User manual

SoundLab Mixer Amplifier
G742BB
User Manual
Thank you for buying a professional Soundlab mixer amplifier. This product
incorporates the latest in mixer amplifier technology and should provide the
user with high quality trouble free sound for many years. To help you derive
the most from you Soundlab mixer amplifier please carefully read the
following user manual.
User Manual for G742BB (MC8240PD)
Important Notes
1. This manual is part of the product and should be kept with the unit at all
times. Please read it carefully before using the product. A copy of this
manual is available on request www.electrovision.co.uk
2. This is a professional product and is not designed for use in a domestic
environment.
Safety Precautions Risk of Electric Shock
1. This product must be earthed at all times.
2. Connection to the mains should be by the mains lead supplied. Fixed
installations should only be undertaken by a qualified person.
3. The product and the mains lead should be checked regularly for
damage. Any repair should only be undertaken by a qualified person.
The product and the mains lead should be tested each year by a
qualified person (this is a legal requirement).
4. Do not expose this product to rain, moisture, extremes of temperature,
acids, alkalies or any other corrosive or reactive agents. Failure to do so
may lead to a risk of fire, electrical shock or product failure/damage.
5. Make sure the power supply is switched off before connecting this
product to the mains supply. All volume controls should be set at zero.
6. Do not attempt to open the enclosure. There are no user serviceable
parts inside. All repairs/inspections should be undertaken by a qualified
person.
7. Disconnect from the mains when not in use.
8. This amplifier can produce high sound pressure levels that can lead to
hearing damage. It is the user’s responsibility to regulate the sound
level according to the environment it is used in. In fixed installations the
!

use of a sound-limiting device is recommended. This can be viewed at
www.electrovision.co.uk.
9. Do not allow liquid or foreign objects to be inserted into this product.
Should this happen by accident do not attempt to repair the product.
Repairs should only be undertaken by a competent person.
10. Do not subject the product to heavy impacts. This can cause internal
damage that can go unnoticed by visual inspection.
11. This mixer amplifier is heavy. Take care when lifting. Seek advice if you
are not sure how to lift an item correctly.
12. The mixer amplifier should be placed on a safe, stable and level surface
that is vibration free. Always make sure the product is stable and
cannot fall when in use. When used on a mobile stand always check the
stand is capable of accepting the weight of the product. The stand
should be checked for defects before mounting the product. Never use
this product on a stand that is damaged or is not capable of accepting
the weight of the product.
13. This product is not suitable for domestic use.
14. When used in a fixed installation the product should be installed by a
qualified personal in accordance with the relevant health and safety
legislation.
Operating Precautions.
1. Do not turn the amplifier up so that the sound becomes distorted. This
will damage the speakers and could damage the internal amplifier. This
is not covered by the guarantee.
2. Make sure this product is switched off and all volume controls are
turned down before connection to the mains (see controls and
functions). All items connected to the unit (CD players, electric
instruments etc.) should be switched off and volume controls turned
down before connection to the mains (see instruction books for the
appropriate product). A surge protection device is recommended for
use with this product. The amplifier should be switched on first and
then connected products.
3. Position the product correctly and safely before switching on. See item
13 of the safety precaution guide.
4. Only use high quality interconnecting leads. They will improve the
sound quality. These can be viewed at www.electrovision.co.uk
5. This product should only be cleaned with a damp cloth. Do not use any
cleaning agents such as detergents or solvents.
6. Do not use any spray cleaners or lubricants on any of the controls or
switches. Make sure the speakers are connected before switching on.
The speaker leads should be checked for damage before use. Only use
high quality speaker leads. These can be viewed at
www.electrovision.co.uk

Controls and Functions
AUX/RET AUX/SENDPHONES
EFFECT SELECT
MIC 1 MIC 2 MIC 3 MIC 4
LINE 1 LINE 2 LINE 3 LINE 4
1 2 3 4 5/6 7/8
POWERED MIXER
TAPE TO MIX
TAPE TO
CTRL ROOM
DSP EFFEC
Mic. A balanced microphone input via 3 pin XLR. The socket
can also provide a 48V phantom power when the phantom
power button is switched on.
Warning Make sure all products are switched off and all controls set at zero
before connecting or disconnecting products. Failure to do so may lead to
damage of the microphone and the amplifier. Only use high quality balanced line
microphones (phantom off) or condenser microphones (phantom on) A selection
of these can be found at www.electrovision.co.uk
Line. A balanced mono line input via 6.35mm (1/4”) jack.
Low Cut. A push button that filters frequencies below 80Hz from
the channel input.
Gain. Increases or decreases the input channel signal level.
Hi. Increases or decrease the high frequencies ±15 dB.
Low.Increases or decreases the low frequencies ±15 dB.
Eff. Controls the amount of effect the channel receives from the
built in effects processor. It is set after the channel fader.
Aux. Controls the signal level sent from this channel to the aux
output.
Pan. Pan control for altering the amount of signal in the right
and left channels.
Level. Controls the output level of this channel into the main
mix..
Peak. Led indicator showing excessive signal level is present in
the channel.
Mid. Increases or decreases the mid frequencies ±15 dB.
Diag. 1 Input Channels 1-4 (Mono)

Control (Diag. 3)
1. Effect Selector. Rotary control for the DSP. Turn this knob to the
appropriate number to select the effect required. A list of the available
effects can be found on the right of Knob.
2. EFF Level. Controls the signal level sent from the effects unit to the
stereo output channels.
3. Aux Send. Controls the signal level sent to the aux output.
4. Aux Return. Controls the signal level sent from the aux return to the
stereo main bus.
5. Tape to Mix Press this button to send the input signal from tape input
sockets to the main stereo bus.
AUX/RET AUX/SENDPHONES
EFFECT SELECT
MIC 4
LINE 4
MAIN
4 5/6 7/8
Model G742BB
POWERED MIXER
TAPE TO MIX
TAPE TO
CTRL ROOM
TAPE
IN
REC
OUT
2 x 100w
DSP EFFECTS PROCESSOR
G742BB (MC8240PD)
DO NOT
OBSTRUCT THE
VENTILATION
FOR PROFESSIONAL USE
Line 5/6 & Line 7/8. Stereo line inputs channels via
6.35mm mono jacks. Use left inputs if using as mono
channels.
-10dB. Press this button to attenuate the line level input by
10dB
Hi. Use this knob to increase or decrease the high
frequencies.
Low.Use this knob to increase or decrease the high
frequencies.
Aux. Controls the amount signal level sent to the auxiliary
output for this channel.
Bal. Controls the left/right signal level for this channel.
Level. Controls the output level of these channels sent to
the main mix.
Diag. 2 Channels 5-8

6. Tape to Control Room. Press this button to send the tape signals to
the control room and headphone. Release the button to send the main
signals to the headphone and control room.
7. Phones/CTRL RM. Controls the signal of the control room and the
headphones.
8. Power On LED. Shows the products is on when the light is illuminated
9. Output level Meter. Shows the signal output level being sent to the
internal amplifier. When the upper red LED’s are illuminated this
indicates that the maximum level for the amplifier has been exceeded.
10. Main. Master volume control. Increase or decreases the post mix signal
to the amplifier.
Diag. 4
1. Aux Ret. Aux return inputs via 2 x 6.35mm mono jack sockets. Use the
left channel with a mono input.
2. Aux send. Aux output via 6.35mm mono jack socket.
3. Phones. Headphone output via 6.35mm jack socket.
4. CTRL RM. Stereo output channel via 2 x 6.35mm mono jack sockets.
For use with powered monitors.
5. Main. Stereo output channel via 2 x 6.35mm mono jack sockets
6. REC OUT.Stereo output channel via 2 x phono sockets
7. Tape In. Input channel via 2 x phono sockets
8. Phantom power switch. Press this switch to send a 48V phantom
power to channels 1-4.
Warning
1
2
3
4
5
6
7
8
EFFECT SELECT
MAIN
5/6 7/8
POWERED MIXER
TAPE TO MIX
TAPE TO
CTRL ROOM
DSP EFFECTS PROCESSOR
G742BB (MC8240PD)
DO NOT
OBSTRUCT THE
VENTILATION
FOR PROFESSIONAL USE
9
10
Diag. 3
AUX/RET AUX/SENDPHONES
EFFECT SELECT
MIC 1 MIC 2 MIC 3 MIC 4
LINE 1 LINE 2 LINE 3 LINE 4
MAIN
1 2 3 4 5/6 7/8
Model G742BB
POWERED MIXER
TAPE TO MIX
TAPE TO
CTRL ROOM
TAPE
IN
REC
OUT
2 x 100w
DSP EFFECTS PROCESSOR
Complies with: EN 60065 EN 55103
Fuse: T3.15A. A/S 250V 5x20mm
(Ref No. F126N)
230V~50Hz 360VA
Ta max - 35ºC
THIS UNIT MUST BE EARTHED
G742BB (MC8240PD)
DO NOT
OBSTRUCT THE
VENTILATION
2 x 100W @ 4
Right
Left
2 x 75W @ 8
FOR PROFESSIONAL USE
ONLY
Diag. 4
1 2 3
4 5 67
8

Make this unit and all connecting units are switched off before connecting
microphones and all controls are set to zero.
Complies with: EN 60065 EN 55103
Fuse: T3.15A. A/S 250V 5x20mm
(Ref No. F126N)
230V~50Hz 360VA
Ta max - 35ºC
THIS UNIT MUST BE EARTHED
2 x 100W @ 4
Right
Left
2 x 75W @ 8
FOR PROFESSIONAL U
ONLY
2
3
Rear of Unit (Diag. 5)
1. AC inlet. Power inlet for use with IEC mains lead
2. On/off switch. Press this switch to turn the unit on.
3. Power outputs to speakers.
Microphone Connections
1
Balanced Operation Unbalanced Operation
Pin 1 Screen Pin 1 Screen
Pin 2 Signal (Live) Pin 2 Signal
Pin 3 Signal (Return) Pin 3 Short to pin 1
Diag. 5

Technical specifications
Inputs Number Type Connector Input Impedance Input Level
Mono Mic 4 Balanced XLR 2K Ohm -50dB
Mono Line 4 Balanced TRS Jack 47K Ohm -30dB
Stereo Line 2 Unbalanced Mono Jack 10K Ohm -10dB
Stereo Aux 1 Unbalanced Mono Jack 10K Ohm -10dB
Stereo Play in 1 Unbalanced Mono Jack 10K Ohm -10dB
Outputs Number Type Connector Output Level
Stereo Power 1 Unbalanced 2 x Mono Jack 2 x 100W @ 4 Ohm
Out 2 x 65W @ 8 Ohm
Stereo Line 1 Unbalanced 2 x Mono Jack
Stereo Monitor 1 Unbalanced 2 x Mono Jack
Aux Send 1 Unbalanced 1 x Mono Jack
Stereo REC 1 Unbalanced 2 x Phono
Out
Headphone 1 Unbalanced 1 x TRS Jack
Channel EQ High = 15KHz
Mid = 2.5KHz
Low = 80Hz
Low cut filter 80Hz 18dB/OCT
Frequency response 20-20000Hz
Power 230Vac@50Hz
Weight 6.5Kg
Dims 250 x 109 x 280mm

Electrovision Ltd.
Lancots Lane
Sutton Oak
St Helens
Merseyside
WA9 3EX
UK
Tel. [phone]
Fax [phone]
www.electrovision.co.uk