User guide

ManualsBrandsBogen ManualsReceivers and AmplifiersGS-250

Gold Seal Series Amplifiers

Models GS-35, GS-60, GS-100, GS-150, GS-250

• 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

Features

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.

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Summary of content (16 pages)

PAGE 1
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 addon 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.
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© 1997 Bogen Communications, Inc. 50 Spring St., Ramsey, NJ 07446 Publication No. 54-5941-04 9903 Printed in Korea All rights are reserved. No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of Bogen Communications Inc. Notice: The information contained in this document is subject to change without notice and should not be construed as a commitment by Bogen Communications, Inc. Bogen Communications, Inc.
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Contents Important Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Packing List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Important Safety Instructions 1. Read and understand all instructions. 2. Follow all warnings and instructions marked on the product. 3. Unplug the product from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleaners. Use a damp cloth for cleaning. 4. Do not use this product near water. 5. Do not place this product on an unstable cart, stand or table, where the product may fall, causing serious damage to the product. 6.
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Features Front Panel (All Models) 3 1 2 4 5 7 6 8 9 10 1. MIC 1 to 4 - Individual level controls for dedicated microphone inputs. 2. MIC 5/TEL - Individual level control for Mic or Tel input depending on input mode selected. 3. MIC 6/AUX 1 - Individual level control for Mic or Aux 1 input depending on input mode selected. 4. AUX 2 - Individual level control for dedicated Aux 2 input. 5. Contour - Enables or disables loudness equalization. Affects only Aux 2 and Mic 6/Aux 1 if set in aux mode. 6.
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Features Rear Panel (GS-35, GS-60, GS-100 & GS-150) 1 5 7 22 14 16 18 19 20 12 3 4 10 9 11 6 8 21 2 17 13 15 1. Amplifier Output - Terminal strip containing all the Gold Seal output taps. 2. VOX - Variable control for adjusting TEL input signal level trigger point for automatic muting of Aux input (works only in the TEL input mode). 3. REMOTE MSTR - Screw terminal pair for connection of remote master volume control (Bogen model: GSRVC). 4.
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Features Rear Panel (GS-250) 14 1 22 8 21 2 16 18 19 20 12 6 3 4 5 7 23 10 9 11 17 13 15 16. MIC 6/AUX 1 - Switch selects either MIC 6 or AUX 1 connections as input. 17. AUX 1 - RCA unbalanced input for Aux 1 input signal (works only when AUX 1/MIC 6 switch is set to AUX 1). 18. MIC 6 - Screw terminals for balanced microphone (active only when AUX 1/MIC 6 switch is set to MIC 6). 19.
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Input Connections source to the AUX 1 RCA jack (only works when the AUX 1/MIC 6 switch is in the AUX1 position). Installation Note Keep input leads away from the output leads and AC power cables. Unless the driving source provides a low-impedance output, keep the input lead under ten feet in length. Make all connections to the unit with the POWER switch in the OFF position. AUX 2 The AUX 2 input uses an RCA plug and accepts input from a dedicated AUX source.
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Input Connections Remote Volume Control Precedence Connections If remote volume control is desired, connect the Bogen accessory GS-RVC remote volume control to the screw terminals marked REMOTE MSTR. Wire length can be up to 1000 feet using 22 gauge wire. Precedence connections allow any combination of inputs to be completely muted with a contact closure. Closing a contact across any of the precedence terminals and the PREC COM 1 terminal will mute that input.
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Output Connections Output Terminal Strip To Power Amp The Gold Seal Series amplifier may be used to drive an external power amplifier (can only be used with unbalanced high impedance inputs). 4Ω Output LINK shorting clip Note: Shorting clip between GND/COM on the speaker output terminals strip must be installed to use this feature. Shorting Clip - Leave for unbalanced lines. Remove for balanced lines Speaker systems are connected directly to the speaker output terminals on the rear panel.
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Operation Power Switch The rear panel AX adjustment controls the mix of the Aphex effect with the audio signal. Counterclockwise rotation of the control minimizes the Aphex effect. Clockwise rotation of the control maximizes the Aphex effect. The POWER switch applies power to the unit. The switch will illuminate when power is on. Dual Function Acoustic Equalizer Individual Volume Controls The unique dual-function equalizer can be used for acoustic shaping or for feedback control.
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Operation Telephone Paging Control VOX The MIC 5/Tel volume control on the front panel controls the volume of the telephone paging input when the control is set to the Tel mode (See page 6 for information on setting the Tel input mode). The telephone page input features voice activated Aux muting. This feature always mutes AUX 2 and only mutes AUX 1 when the AUX1/MIC 6 is set in that position.
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Troubleshooting Amplifier will not turn ON. On the GS-35, GS-60, GS-100 and GS-150, depress the circuit breaker. On the GS-250, check the fuse. Replace fuse only with same type and rating. No output on 70V, 25CT, or 25V. Check that the LINK switch on the rear panel is in the IN position or external signal-processing equipment, if used, is functioning Make sure that the shorting clip on the DIRECT OUT 4Ω output is in place. No telephone output.
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Bogen Service Caution There are no user-serviceable parts within the amplifier. Have all internal servicing performed by a qualified technician. The warranty may become void if repairs are performed by other than the Bogen Factory Service Department. The Bogen Gold Seal Series Amplifier is covered by a 3-year warranty and overnight installation-site replacement program (see below). If you encounter difficulty with your Bogen Gold Seal amplifier, please do not hesitate to ask our advice or assistance.
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Technical Specifications Power Rating (RMS): GS-35 — GS-60 — GS-100 — GS-150 — GS-250 — Frequency Response: Transformer Output — Direct — Distortion: Direct — Transformer — Signal-to-Noise Ratio: Fundamental — Aux 1 & 2 — Tel — Mic 1 - 6 — Inputs/Outputs: Mic — Aux— Telephone — Output to Power Amp — Power In/Pre Out — WMT-1A Output — Tape Output — Output Impedance: Output Regulation: Variable Mute Range: ALC: VOX Threshold: Mic Precedence: Loudness Contour: Aphex Aural Exciter: Overload Protection: Thermal
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50 Spring Street, Ramsey, NJ 07446 Tel. 201-934-8500 Fax: 201-934-9832 www.bogen.