Related Manuals for Quest Engineering PB-4120
Summary of Contents for Quest Engineering PB-4120
- Page 1 Owner’s Manual PB-4120 POWER AMPLIFIER CH 1 CH 2 CH 3 CH 4 PROTECT POWER CLIP -20 dB SIGNAL PB-4120...
- Page 2 WARNING...
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Page 3: Table Of Contents
Table of Contents PB-4120 Table of Contents Introduction ………………………………………………………… 2 Features ……………………………………………………………… 3 Front Panel Controls ………………………………………………… 4 Rear Panel Controls ………………………………………………… 5 Connections ................6 System Set Up ..……………………………………………………… 7 Output Wiring Guide ..............8 Specifications ..……………………………………………..……… 9 Block Diagram ……………………………………………………… 10... -
Page 4: Introduction
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 –... -
Page 5: Features
Features PB-4120 Features The Jam industry PB-4120 power amplifiers have been developed using the latest technology in Class D power amplifier design. Here are some of their main features: • The amplifier delivers 120 watts of clean power per channel at 70/100 volts and 4 Ohms, with 4 x 120 watts. • Class D amplifier operating at 85% efficiency using universal power supplies with power factor correction and capable of operating from 100-240 V, 50 or 60 Hz. The PB-4120 amplifiers generate virtually no heat and thanks to their low current draw. • Built-in 70/100 volt output transformers with flat frequency response from 40Hz to 20kHz provide constant voltage for distributed speaker systems. -
Page 6: Front Panel Controls
Front Panel Controls PB-4120 Front Panel Controls PB-4120 POWER AMPLIFIER CH 1 CH 2 CH 3 CH 4 PROTECT POWER CLIP -20 dB SIGNAL 1. Handle - For easy transport while carrying, output level for the corresponding channel. or while rack mounting, the amplifier features... -
Page 7: Rear Panel Controls
Rear Panel Controls PB-4120 Rear Panel Controls SPEAKER OUTPUT WARNING CAUTION ADJUST ADJUST ADJUST ADJUST DO NOT EXPOSE FOR CONTINUED 400Hz 400Hz 400Hz 400Hz CH 2 CH 1 THIS EQUIPMENT PROTECTION AGAINST TO RAIN OR RISK OF FIRE, REPLACE MOISTURE... -
Page 8: Connections
PB-4120 Connections Connections The following diagrams illustrate various wiring set ups for 4 ohm, 8 ohm and 70 Volt operation. SPEAKER OUTPUT WARNING CAUTION ADJUST ADJUST ADJUST ADJUST DO NOT EXPOSE FOR CONTINUED 400Hz 400Hz 400Hz 400Hz CH 2 CH 1... -
Page 9: System Setup
PB-4120 System setup System setup The following is a typical constant voltage system setup for a small restaurant using the Jam industry Preamplifier power amplifier along with an S zone feeding several audio zones with paging and music. The first two channels are connected to four wall-mounted speakers in each of the Dining Rooms with their transformers set to a 25 watt tap. -
Page 10: Output Wiring Guide
Output Wiring Guide PB-4120 Output Wiring Guide There are several ways to interface the amplifers, depending on your exact system set-up. For most small installation 14 to 16 gauge zip cord can be used for most small to medium size installations. Follow the cable diagrams below for connecting to the input of your amplifier. 4 and 8 Ohm Wiring Guide 100 V 70 V 25 V (5.2 4 OHM 25 Volt Wiring Guide 100 V 70 V 25 V (5.2 4 OHM 70 Volt Wiring Guide... -
Page 11: Specifications
Specifications PB-4120 Specifications All channels driven 8 ohms ..........65 Watts 4 ohms . -
Page 12: Block Diagram
Block Diagram PB-4120 Block Diagram... - Page 13 PB-4120...