Introduction - Quest Engineering PB-4120 Owner's Manual

Introduction

PB-4120
Introduction
PB-4120
POWER AMPLIFIER
CH 1 CH 2 CH 3 CH 4
PROTECT POWER
CLIP
ON
-20 dB
OFF
SIGNAL
PB-4120
MULTI-ZONE POWER AMPLIFIER
Welcome
Thank you for purchasing the PB-4120 constant voltage power amplifiers from Jam
industry Technologies! The PB-4120 have been designed to provide robust, clean out-
put with low distortion and wide dynamic range, along with the dependability demand-
ed by the most professional design engineers and audio installers. The PB-4120 is
enclosed in a convenient 2 rack-space chassis and feature highly efficient Class D
power cores with universal power supplies that operate from 100 – 240 volts, at 50
or 60 Hz. Each of the channels reach full power of 120 watts at 4 ohms, but they can
also run at 70 or 100 volts thanks to their internal, high performance, toroidal match-
ing transformers. Front panel controls and displays include a Power switch with LED
indicator, as well as independent channel input level controls. The amplifiers include
front panel Signal, Peak and 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-up, over-heating, over-current, short circuit, low output impedance and DC volt-
age, assures high reliability under the most demanding situations. 19-inch rack mount
design and convenient carry handles facilitating easy installation in any rack. Optimized
for commercial installations, houses of worship, live sound venues and for driving small
and medium-sized live PA systems, the PB-4120 will deliver reliable power. The Its'
advanced technology, clear sound and reliable performance makes them ideal for any
small PA or any distributed sound system installation.
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