Bogen GS-35 User Manual

Gold Seal Series Amplifier

GS35, GS60, GS100, GS150, & GS250 Models

Installation and Use Manual

© 1997 & 2008 Bogen Communications, Inc.

All rights reserved.

Specifications subject to change without notice.

54-5941-04C 1002

2

Notice

Every effort was made to ensure that the information in this guide
was complete and accurate at the time of printing. However, infor­mation is subject to change.

Important Safety Information

WARNING: To Reduce The Risk of Fire Or Electric Shock

Do Not Expose This Apparatus To Rain Or Moisture.

Always follow these basic safety precautions when installing and
using the unit:

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water. The apparatus shall
not be exposed to dripping or splashing and no objects filled
with liquids, such as vases, shall be placed on the apparatus.

6. Clean only with dry cloth.

7. DO NOT block any ventilation openings. Install in
accordance with the manufacturer’s instructions.

8. Do not install near any heat sources such as radiators, heat
registers, stoves, or other apparatus (including amplifiers)
that produce heat.

9. Do not defeat the safety purpose of the polarized or ground­ing-type plug. A polarized plug has two blades with one wider
than the other. A grounding-type plug has two blades and a
third grounding prong. The wide blade, or the third prong, are
provided for your safety. If the provided plug does not fit into
your outlet, consult an electrician for replacement of the
obsolete outlet.

10. Protect the power cord from being walked on or pinched, par­ticularly at plugs, convenience receptacles, and the point
where they exit from the apparatus.

11. Only use attachments/accessories specified by the manufac­turer.

12. Unplug this apparatus during lightning storms or when
unused for long periods of time.

13. Refer all servicing to qualified service personnel. Servicing is
required when the apparatus has been damaged in any way,
such as power-supply cord or plug is damaged, liquid has
been spilled or objects have fallen into the apparatus, the
apparatus has been exposed to rain or moisture, does not
operate normally, or has been dropped.

Domestic and International Listings

UL and C-UL Listed.

IMPORTANT

CAUTION: TO PREVENT THE RISK OF ELECTRIC
SHOCK, DO NOT REMOVE COVER (OR BACK).
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED PERSONNEL.

The lightning flash with arrowhead
symbol, within an equilateral trian­gle, is intended to alert the user to
the presence of uninsulated “dan­gerous voltage” within the product’s
enclosure that may be of sufficient
magnitude to constitute a risk of
electric shock to persons.

The exclamation point within an
equilateral triangle is intended to
alert the user to the presence of
important operating and mainte­nance (servicing) instructions in
the literature accompanying the
appliance.

3

Contents

Important Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Packing Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Panel Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8

Front Panel (All Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Rear Panel (Models GS35, GS60, GS100, GS150) . . . . . . . . . . . . . . . . . . . .7

Rear Panel (GS250) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Input Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-10

MIC 1-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

MIC 5/TEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

MIC 6/AUX 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

AUX 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Phantom Power for MIC 5 & MIC 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Remote Volume Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Precedence Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Output Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Output Terminal Strip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

WMT1A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

To Power Amp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Pre-Out/Power In Jack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Tape Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-14

Power Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Individual Volume Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Lo-Cut Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Contour Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Audio Enhancement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Dual-Function Acoustic Equalizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Telephone Paging Controls & Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Variable Mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Limited Warranty; Exclusion of Certain Damages . . . . . . . . . . . . . . . . . . . . .17

4

Introduction

The Bogen Gold Seal Series amplifiers were designed with the sound contractor in mind. They provide unparalleled
flexibility and versatility, without the need for 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 amplifier models incorporate the exact same
set of features – from 35 watts up to 250 watt models.

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

Packing Contents

1 - Gold Seal Series Amplifier

1 - User Manual

Accessories

The following accessories are available for your Gold Seal Series Amplifier at additional cost:

• Model GSTRC — A plexiglass cover to protect control settings

• Model GSRPK — Rack mounting installation kit

• Model GSRVC — From distances up to 1000 feet away from the amplifier, this remote volume control adjusts

the volume of the amplifier

5

• 4 Dedicated microphone inputs (XLR connectors)

• 1 Selectable MIC/TEL input

• 1 Selectable MIC/AUX input

• 1 Dedicated AUX input

• 4-Ohm direct output

• 8-Ohm, 25V, 25VCT, and 70V transformer-

coupled outputs

• 35W, 60W, 100W, 150W and 250W models

• Rack mountable – 2RU package for all models

• Dual-function 10-band graphic equalizer (Acoustic

EQ/Feedback Control)

• True loudness contour function

• Audio Enhancement feature for improved intelligibility

• Switchable phantom power (15V DC)

• 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 (GS250 only)

• Available tamper-resistant front cover (GSTRC)

• Available rack mounting kit (GSRPK)

• Available remote volume control (GSRVC)

Panel Descriptions

Front Panel (All Models)

6

1

2 5

6

9 10

8

743

1. MIC 1 to 4 - Individual level controls for dedicated microphone inputs.

2. MIC 5/TEL - Individual level control for MIC 5 or TEL input depending on input mode selected.

3. MIC 6/AUX 1 - Individual level control for MIC 6 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. Dual Mode Equalizer - 10 band graphic EQ with dual center frequency ability.

7. Dual Mode Equalizer Selector Switch - Selects EQ frequency bands or EQ defeat (OUT).

8. MASTER - Master output level control.

9. AUDIO ENHANCEMENT - Enables or disables the Audio Enhancement effect. Affects all input signals.

10. POWER - AC Power switch.