Quest Engineering PB-4120 Owner'S Manual Download Page 1 | Manualshive

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Quest Engineering PB-4120 Owner'S Manual Download Page 1

PROTECT

CH 1

CH 2

CH 3

CH 4

CLIP

-20 dB

SIGNAL

POWER

POWER AMPLIFIER

PB-4120

ON

OFF

Owner’s Manual

PB-4120

1
2
3
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Summary of Contents for PB-4120

Page 1: ...PROTECT CH 1 CH 2 CH 3 CH 4 CLIP 20 dB SIGNAL POWER POWER AMPLIFIER PB 4120 ON OFF Owner s Manual PB 4120 ...

Page 2: ...WARNING ...

Page 3: ...1 PB 4120 Introduction 2 Features 3 Front Panel Controls 4 Rear Panel Controls 5 Connections 6 System Set Up 7 Output Wiring Guide 8 Specifications 9 BlockDiagram 10 Table of Contents Table of Contents ...

Page 4: ... Protection LED indicators to help you set the correct operating levels Euro block input and output connectors are provided to insure easy connections and maximum flexibility To keep the amplifiers running cool their designs employ internal wind tunnels with forced air cooling via an internal fan which greatly reduces the chance of thermal and overheating problems Multi stage protection for power ...

Page 5: ...t for overloading clipping conditions Forced air cooling via internal fan provides reliable performance without thermal and overheating problems Protection circuitry with dedicated LEDs for each channel that guards against overheating or faulty wiring conditions and also prevents thumps when powering on or off This means that you can use the PB 4120 with a single power strip into which a mixer or ...

Page 6: ...be overloading the PB 4120 and a distorted clipped signal is probably being output 4 Protection LED This goes on for approximately one second whenever the PB 4120 is powered on and then turns off The Protection LED will also light when overheating or other severe problems occur It is normal for the Protection LED to fade slowly when the amp is powered off When lit no signal is provided to any conn...

Page 7: ... also be inserted into these inputs but you ll get better signal quality and less outside noise and hum if you use balanced lines The SZ Series accepts input levels of any strength but needs at least 0 dBu to achieve maximum power 3 Link Output Connectors Connect out going signals from these jacks 4 AC input Connect the supplied heavy gauge 3 pin IEC power cable here 5 Euroblock Output connectors ...

Page 8: ... 0 dB ADJUST LINK CH 3 INPUT OFF ON HPF 400Hz 12 0 dB ADJUST LINK CH 1 INPUT OFF ON HPF 400Hz DESIGNED AND ENGINEERED IN KOREA WARNING DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE CAUTION FOR CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE ONLY SAME TYPE FUSE AVIS RISQUE DE CHOC ELECTRONIQUE NE PAS OUVRIR ATTENTION UTILISER UN FUSIBLE DE RECHANGE MEME TYPE CH 3 COM CH 2 CH 1 12 0 dB ADJUST L...

Page 9: ...p System setup System setup PM 10 2 CH 4 SPEAKER OUTPUT PUBLIC ADDRESS POWER AMPLIFIER PB 4120 12 0 dB ADJUST LINK CH 2 INPUT OFF ON HPF 400Hz 12 0 dB ADJUST LINK CH 3 INPUT OFF ON HPF 400Hz 12 0 dB ADJUST LINK CH 1 INPUT OFF ON HPF 400Hz DESIGNED AND ENGINEERED IN KOREA WARNING DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE CAUTION FOR CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE ONLY SAME...

Page 10: ...ur amplifier Output Wiring Guide 100 V 83 70 V 41 25 V 5 2 COM 4 OHM 100 V 83 70 V 41 25 V 5 2 COM 4 OHM 100 V 83 70 V 41 25 V 5 2 COM 4 OHM 100 V 83 70 V 41 25 V 5 2 COM 4 OHM Output Wiring Guide 4 and 8 Ohm Wiring Guide 25 Volt Wiring Guide 70 Volt Wiring Guide 100 Volt Wiring Guide SHOCK HAZARD SYMBOL WARNING PAY ATTENTION TO THE WARNING SYMBOL AND AVOID ELECTRICAL SHOCK DO NOT HOLD OR TOUCH TH...

Page 11: ...20kHz brickwall filter 70dB Input Clipping 26dBu Connectors each channel Input XLR jack Output Euroblock Controls AC power switch Channel volume HPF Indicators Power on blue Protection red Signal green for each Ch Cilp red for each Ch Protection Short circuit Thermal Current limit DC offset Current inrush RF protection Turn on Turn off muting Cooling Continuously variable speed fan forced air Tran...

Page 12: ...10 PB 4120 Block Diagram Block Diagram ...

Page 13: ...11 PB 4120 ...

Page 14: ......

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