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INTRODUCTION T

O QA

Introduction 

Congratulations on your purchase of a new 
QA Series professional power amplifier. Quest 
Engineering QA Series amplifiers are engineered 
and built to a standard that will satisfy the most 
demanding environments of both mobile live sound 
and permanent installation audio.

For your safety and continuing reliability of 
your Quest amplifier, please read all the safety 
instructions and familiarise yourself with the 
amplifiers functions and installation procedure 
section before installing and operating the amplifier.

Attention to detail

 

In order to maintain strict quality assurance 
standards, all QA Series amplifiers are built and 
tested in Quest Engineering’s own manufacturing 
facility. Electronic components are the finest grade 
available, and sub-assemblies are tested at every 
stage before final assembly. Each amplifier is then 
subjected to stress testing before shipping. 

It follows that if your audio installation is completed 
with the same attention to detail, your amplifier will 
deliver its best results. It is recommended to make 
sure all the mixers and signal processors in the 
signal chain to the amplifier are set correctly. Clean 
un-distorted power will not just sound better; it will 
also help your speakers give you a long service life. 

Unpacking 

Please inspect the amplifier carefully immediately 
after unpacking. If you find any damage, notify your 
supplier/dealer immediately. Only the shipper may 
file a damage claim with the carrier for damage 
incurred during shipping. Be sure to save the carton 
and all packing materials for the carrier’s inspection.

If your packing materials are in good condition, 
please save them. If you ever need to ship the unit 
back to Quest Engineering or an authorised service 
centre, you are advised to use the original factory 
packing.

Quest QA Series Power Amplifiers

QA

 SERIES

User Manual

4

User Manual

QA

 Series

Power Amplifiers

Summary of Contents for QA 4004

Page 1: ...QA SERIES QA 1004 QA 2004 QA 3004 QA 4004 POWER AMPLIFIERS user manual...

Page 2: ...ts with solvents or petrochemical based cleaners The power voltages inside this device are high and could cause serious injury or death if touched while the power is connected Do not open the ampli er...

Page 3: ...u for choosing Quest Please take the time to complete your procuct registration card which is included with the packaging Registering your Quest Engineering product will 6 Do not locate ampli ers clos...

Page 4: ...r is then subjected to stress testing before shipping It follows that if your audio installation is completed with the same attention to detail your ampli er will deliver its best results It is recomm...

Page 5: ...orrect wiring instructions A W L A YS SWITCH OFF AMPLIFIER BEFORE OPERATING BRIDGE SWITCH 11 LIMITER Switches between off and on 12 GAIN Input switch to calibrate mixer line level to ampli er input se...

Page 6: ...r band pass type bass boxes The ampli er can be used to power a bass system without the need for an electronic crossover by switching the high pass to 35Hz and the low pass to 80 or 110Hz The input li...

Page 7: ...to control amplifier level Parallel Mono is selected when you have an odd number of speakers such a three Instead of leaving the amplifier in stereo two channel mode and driving two on one side and o...

Page 8: ...y essential Damage to the ampli er caused by incorrect rack mount installation or transit damage is not covered by the warrantee Installation and electrical interference Avoid installing your ampli er...

Page 9: ...e output speaker connector the speaker is now connected across the two channels Power is proportional to the square of the voltage swing so four times the output power is possible The reality is that...

Page 10: ...PIN 1 SIGNAL GROUND LINK A LINK B INPUT A INPUT B Push ToReset 220 240V 10A 50 60Hz OUTPUT A OUTPUT B BRIDGE PIN1 PIN2 PIN3 SIGNAL GND SIGNAL SIGNAL CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN OFF 80H...

Page 11: ...ode switch and gain select switch Two front panels attenuators rear panel mode switch and gain select switch Hi Pass Linkwitz Reily 24 db Octave Off 35 80 Hz Off 35 80 Hz Low Pass Linkwitz Reily 24 db...

Page 12: ...www questaudio net...

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