QA SERIES QA 1004 | QA 2004 | QA 3004 | QA 4004 POWER AMPLIFIERS user manual
QA SERIES User Manual CONTENTS / SAFETY Contents Safety 02-03 Introduction to QA Series 04 Connections 05 Amplifer installation information 06-07 Installation procedure 08-09 System configuration diagrams 09-10 Specifications 11 Safety Precautions Carefully read the user manual fully prior to use. Improper use can cause damage to the amplifier and any speakers attached to it. Please be aware of correct wiring and configurations as directed in the Installation section of this manual.
QA SERIES User Manual 1. Read all the documentation accompanying your amplifier before operating. 6. Do not locate amplifiers close to sources of heat or moisture. 2. Make absolutely sure the power supply is wired correctly. This can be done with a commercially available power supply tester. This especially applies to three-phase distribution boards where an incorrectly wired or intermittent neutral line can cause excessive voltages causing permanent damage to any 230-110 volt equipment connected to it.
QA SERIES User Manual INTRODUCTION TO QA Quest QA Series Power Amplifiers 4 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. Unpacking Please inspect the amplifier carefully immediately after unpacking. If you find any damage, notify your supplier/dealer immediately.
QA SERIES User Manual CONNECTIONS , + * ) ’ ( - . Lk Lm Lo Lp 5 CAUTION OFF 35Hz 80Hz STEREO PARALLEL BRIDGE HIGH PASS -A OFF 80Hz 1.
QA SERIES User Manual INSTALLATION Notes for better amplifier performance 6 • Amplifier gain The amplifier should always be operated with the input level controls set at maximum. The only departure from this practice is where the internal filters/crossover is engaged in a bi-amp configuration, where it may be necessary to turn down the high frequency side of the amplifier.
• Rack-mounting amplifiers for the road The Chassis of the QA series is fabricated from Q235 Cold Steel Rolling and is quite durable. However, suspending an amplifier in free space in a rack and then vibrating in the back of a truck for long rough journeys may cause fatigue to the front panel mounting. It is essential that the amplifier be supported from the front and rear in rack-mounting especially when the amplifier rack is to be transported. Failure to install correctly may void warrantee.
QA SERIES User Manual INSTALLATION Installation Procedure 8 Mains Power Connection Before connecting the amplifier to the mains power, make certain that the voltage corresponds with that indicated on the rear of the amplifier. A variation of 10% is acceptable. Refer to safety warnings before switching on. Power Up It is standard procedure to power up the amplifiers last and shut down first.
QA SERIES User Manual each other. The A channel handles the positive voltage swing and the B channel becomes the negative, thus doubling the output voltage swing. Via the “bridge output” speaker connector, the speaker is now connected across the two channels. Output is via the middle Speakon connector. The output signal is across pins number 1+,1-. Power is proportional to the square of the voltage swing, so four times the output power is possible.
QA SERIES User Manual Parallel-Mono Operation PARALLEL MODE SWITCH AMPLIFIER OFF BEFORE ENGAGING MONO/BRIDGE SWITCH OR SERIOUS AMPLIFIER DAMAGE WILL RESULT CAUTION OFF 35Hz 80Hz STEREO PARALLEL BRIDGE 1.
QA SERIES User Manual QA 1004 QA 2004 QA 3004 QA 4004 Rated Power (2 x 8 Ohms) 290 W per channel @ 1 kHz at <0.1% T.H.D.both channels driven 490 W per channel @ 1 kHz at <0.1% T.H.D. both channels driven 660 W per channel @ 1 kHz at <0.05% T.H.D. both channels driven 1,090 W per channel @ 1 kHz at <0.05% T.H.D. both channels driven Rated Power (2 x 4 Ohms) 575 W per channel @ 1 kHz at <0.1% T.H.D.both channels driven 870 W per channel @ 1 kHz at <0.1% T.H.D.
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