Bogen Gold Seal GS150 Manual

Bogen Gold Seal GS150 Manual

Gold seal series amplifiers
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Gold Seal Series Amplifiers
Models GS-35, GS-60, GS-100, GS-150, GS-250
The Bogen Gold Seal Series amplifiers are an extraordinary addition to Bogen's line of quality audio amplifiers. Designed
with the sound contractor in mind, they provide unparalleled flexibility and versatility, without the need for expensive add-
on modules.
Unlike other typical amplifier lines, the professional sound contractor need not purchase a higher-powered amplifier just to
get more extensive features or flexibility. Each of the Gold Seal Series amplifiers — 250W, 150W, 100W, 60W and 35 W
models — incorporate the exact same set of features.
In addition to its extensive input flexibility, the Gold Seal Series amplifiers offer a combination of features not found in any
other commercial amplifier.
Features
• 4 dedicated microphone inputs (XLR connectors)
• 1 selectable Mic/Tel input
• 1 selectable Mic/Aux input
• 1 dedicated Aux input
• 4-ohm direct coupled output
• 8-ohm, 25V, 25VCT, and 70V transformer-
coupled outputs
• 35W, 60W, 100W, 150W and 250W versions
• Rack mountable — 2RU package for all models
• Dual function 10-band graphic equalizer (Acoustic
EQ/Feedback Control)
• True loudness contour function
• Aphex® Aural Exciter for improved intelligibility
• Switchable phantom power supply
• Variable Aux input muting
• Remote master volume control capability
• Input muting via contact on all inputs
• Voice activated aux muting on Tel input
• Automatic level control on Tel input
• Aux fade back after Tel page
• Preamp out/Power amp in connections
• Booster amp output connection
• Tape output connection
• Balanced line driver output (using
WMT1A accessory)
• Lo-cut filter for Mic channels
• 3-speed fan cooling (GS-250 only)
• Available tamper resistant front cover
• Available rack mounting kit
• Available remote volume control

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Table of Contents
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Summarization of Contents

Introduction to Gold Seal Series Amplifiers
Gold Seal Series Models
Overview of amplifier models GS-35, GS-60, GS-100, GS-150, GS-250.
Amplifier Features Overview
General capabilities and flexibility of the Gold Seal Series.
Safety and Legal Information
Copyright and Publication Notice
Details company information, publication number, and notice of changes.
Important Safety Warnings
Explains warning labels and general safety precautions for product use.
Unpacking and Accessories
Packing List and Contents
Lists items included in the Gold Seal Series amplifier carton.
Optional Accessories
Describes available accessories for purchase to enhance functionality.
Front Panel Controls and Indicators
Front Panel Layout
Identifies and describes all controls and indicators on the front panel.
Input Level Controls
Details controls for MIC 1-4, MIC 5/TEL, MIC 6/AUX 1, and AUX 2 inputs.
Signal Shaping Controls
Covers Contour, Dual Mode Equalizer, and Aphex Aural Exciter features.
Master and Power Controls
Describes the MASTER output level and POWER switch.
Rear Panel Connections and Controls (GS-35/60/100/150)
Rear Panel Layout (GS-35/60/100/150)
Identifies and describes rear panel connections and controls for specific models.
Speaker Output Terminals
Details the terminal strip for connecting speaker systems.
Input and Precedence Connections
Covers MIC/AUX/TEL inputs, precedence, and remote controls.
Output and Processing Connections
Describes Tape Out, To Power Amp, Pre Out/Power In, and WMT-1A connections.
Filter and Phantom Power
Explains Lo-Cut Filter and Phantom Power switches for microphone inputs.
Rear Panel Connections and Controls (GS-250)
Rear Panel Layout (GS-250)
Identifies and describes rear panel connections and controls specific to the GS-250 model.
Input Selection Switches
Details switches for MIC 6/AUX 1 and MIC 5/TEL inputs.
Tel Input Controls
Covers ALC and VAR MUTE controls for telephone paging.
Cooling System
Describes the 3-speed fan for the GS-250.
Input Connection Details
General Input Connection Note
Provides important installation notes for connecting inputs.
Microphone Inputs (MIC 1-4)
Details XLR connections and phantom power for MIC 1-4.
MIC 5/TEL and MIC 6/AUX 1 Inputs
Explains dual-function inputs and their selection methods.
AUX 2 Input
Describes the dedicated RCA input for AUX 2.
Phantom Power for MIC 5 & MIC 6
Explains the internal jumper for phantom power on MIC 5/6.
Remote Control and Muting Setup
Remote Volume Control Setup
Details connecting the Bogen GS-RVC for remote volume adjustment.
Precedence Connection Configuration
Explains how to set up external muting for multiple inputs.
Output Connection Configurations
Speaker Output Terminal Strip
Details wiring for speaker outputs, including shorting clips.
WMT-1A Transformer Connection
Describes using the WMT-1A accessory for 600 ohm output.
External Amplifier Connection (To Power Amp)
Explains connecting to an external power amplifier.
Signal Processing Connections (Pre Out/Power In)
Details using Pre Out and Power In jacks for external processing.
Tape Recorder Output (Tape Out)
Describes the output for connecting a tape recorder.
Amplifier Operation
Power Switch and Volume Controls
Operation of the power switch and individual/master volume controls.
Tone Shaping Features
Covers Lo-Cut Filter and Contour Pushbutton Switch.
Audio Enhancement Features
Details the Aphex Aural Exciter function.
Dual Function Acoustic Equalizer
Explains modes for Acoustic Shaping and Feedback Control.
Telephone Paging Operation
Telephone Paging Controls
Operation of Tel input volume and muting.
Automatic Level Control (ALC)
How to adjust the ALC for consistent paging levels.
Voice Activated Muting (VOX)
Adjusting VOX sensitivity for muting Aux inputs.
Variable Mute (VAR MUTE)
Selecting levels for Aux input muting during pages.
Troubleshooting Common Issues
Power and Output Problems
Solutions for amplifier not turning on or no output.
Telephone and Muting Issues
Troubleshooting telephone input and muting functions.
Audio Quality and Input Problems
Resolving microphone noise, phantom power, and Aux 1 input issues.
Service and Warranty Information
Internal Servicing Caution
Warning against user-serviceable parts and voiding warranty.
Warranty Repair Process
Instructions for shipping units for warranty service.
Out-of-Warranty Service
Procedures for service after the warranty period.
Pre-Operation Checklist
Key checks before operating the amplifier.
Technical Specifications
Power and Frequency Response
Details power ratings and audio frequency range for all models.
Distortion and Signal-to-Noise Ratio
Specifies distortion levels and noise performance.
Input/Output Characteristics
Lists connector types, sensitivities, and impedance.
Protection and Physical Specifications
Covers overload protection, thermal protection, fusing, dimensions, and weight.
Company Contact Information
Bogen Communications Contact Details
Provides address, phone, fax, and website for Bogen.

Table of Contents