Quest Engineering QA 1004 User Manual Download Page 1 | Manualshive

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QA

SERIES

QA

1004 |

QA

2004 |

QA

3004 |

QA

4004

POWER AMPLIFIERS

user manual

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Summary of Contents for QA 1004

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

Page 2: ...rts 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 ampliﬁer case as there are no user serviceable parts inside Safety Precautions Installation allowing direct precipitation is not advised and installation practise must prevent liquids from entering the box D...

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 ampliﬁers close to sources of heat or moisture 7 Keep air intake area clear It is good practice to clean ﬁlter regularly and occasionally check the ampliﬁer is not clogged with dust A hot ampliﬁer rack is a sign of...

Page 4: ...er 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 ...

Page 5: ...correct 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 ampliﬁer input sensitivity 13 GROUND Seperates electrical earth from that of chassis ground 14 OUTPUTS Channel A B and Bridge Outputs Speakon NL4 connectors output on pin1 and 1 15 RESET Push circuit breaker to reset...

Page 6: ...er band pass type bass boxes The ampliﬁer 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 link A B XLR connectors at the back of the ampliﬁer will remain full range so a full range signal can be daisy chained to another ampliﬁer or powered speaker Ampliﬁer limiter The switchable limiter is ...

Page 7: ...ed 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 one on the other By selecting Parallel Mono you can parallel all three and drive them with equal power when connected to either or both speaker outputs Parallel mono is also more desirable for the am...

Page 8: ...ly essential Damage to the ampliﬁer caused by incorrect rack mount installation or transit damage is not covered by the warrantee Installation and electrical interference Avoid installing your ampliﬁer near sources of magnetic ﬁelds such as radio transmitters welding equipment high current transformers lighting dimmers or electric motors All signal cables should be physically isolated from power c...

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 this would exceed the capability of the output stage but a considerable increase in output will result all the same Caution In this mode output voltages are high enough to constitute a shock hazard Wi...

Page 10: ...1 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 80Hz 110Hz LOWPASS A OFF 35Hz 80Hz HIGHPASS A 26dB 32dB 1 4V GAIN STEREO PARALLEL BRIDGE MODE PARALLEL MODE OFF 35Hz 80Hz HIGHPASS B OFF 80Hz 110Hz LOWPASS B ON OFF LIMITER LIFT GROUND GROUND DESIGNED B...

Page 11: ...mode 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 Octave Off 80 110 Hz Off 80 110 Hz Voltage Gain 0 775V 29 dB or 24 dB 32 dB or 26 dB 35 dB or 29 dB 38 dB or 32 dB Crosstalk 60 dB 1 kHz at rated power 8 Ohms 60 dB 1 kHz at rated power 8 Ohms 60 dB...

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

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