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 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 transformercoupled 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

© 1997 Bogen Communications, Inc.

50 Spring St., Ramsey, NJ 07446

Publication No. 54-5941-04B

0711

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. assumes no responsibility for any errors that may appear in this document nor does it make an expressed or implied warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose.

Bogen Communications Inc. shall not be liable for incidental or consequential damages in connection with, or arising out of the furnishing, performance, or use of this document and the equipment which it describes.

WARNING

The Warning label calls attention to a procedure, practice, or the like, which, if not correctly performed or adhered to, could result in damage to the unit or personal injury. Do not proceed beyond a warning label until the indicated conditions are fully understood and met.

Warning: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

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.

Bogen® is a registered trademark of Bogen Communications, Inc.

APHEX® is a registered trademark of Aphex Inc.

Contents

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

Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Packing List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Front panel (All Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Rear panel (Models GS-35, GS-60, GS-100, GS-150) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Rear Panel (GS-250) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Input Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Mic 1-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Mic 5/Tel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Mic 6/Aux1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Aux 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Phantom Power for Mic 5 & Mic 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Remote Volume Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Precedence Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Output Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Output Terminal Strip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

WMT-1A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

To Power Amp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Pre-Out/Power In Jack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Tape Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Power Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Individual Volume Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Lo-Cut Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Contour Pushbutton Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Aphex Aural Exciter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Dual Function Acoustic Equalizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Telephone Paging Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Variable Mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

1

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. Slots and openings in the cabinet and the back or bottom are provided for ventilation, to protect it from overheating.

These openings must not be blocked or covered. This product should not be placed in a built-in installation unless proper ventilation is provided.

7. This product should be operated only from the type of power source indicated on the marking label.

8. The power supply included with this product has a 2-prong plug for connection with a standard electrical outlet. Do not allow anything to rest on the power cord. Do not locate this product where the cord will be abused by persons walking on it.

9. Do not overload wall outlets and extension cords as this can result in the risk of fire or electrical shock.

10.Never push objects of any kind into this product through cabinet slots as they may touch dangerous voltage points or short out points that could result in a risk of fire or electric shock. Never spill liquid of any kind on the product.

11.To reduce the risk of electric shock, do not disassemble this product, but return it to the factory service center when some service or repair work is required. Opening or removing covers may expose you to dangerous voltages or other risks. Incorrect assembly can cause electric shock when the product is subsequently used.

12.Unplug this product from the wall and refer servicing to the factory service center personnel under the following conditions: a. When the power supply cord or plug is damaged or frayed.

b. If liquid has been spilled into the product.

c. If the product has been exposed to rain or water.

d. If the product does not operate normally by following the operating instructions. Adjust only those controls that are covered by the operating instructions because improper adjustment of other controls may result in damage.

e. If the product has been dropped or the cabinet has been damaged f. If the product exhibits a distinct change in performance.

NOTE: SAVE THESE INSTRUCTIONS

Unpacking

Packing List

The unit was carefully checked before leaving the factory.

The Gold Seal Series carton contains the following components:

1 - Gold Seal Series unit

1 - User Manual

Accessories

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

• Model GSTRC — A plexiglass cover to protect control settings

• Model GSRPK — Rack mounting installation kit.

• Model GSRVC — A remote volume control to control volume of the amplifier from distances up to 1000 feet.

2

Features

Front Panel (All Models)

3 4 7 8

1 2 5 6 9 10

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.

APHEX AURAL EXCITER - Enables or disables the Aphex Aural Exciter effect. Affects all input signals.

10. POWER - AC Power switch.

3

Features

Rear Panel (GS-35, GS-60, GS-100 & GS-150)

1 5 7 22 14 16 18 19 20

10 9 11 6 8 21 2

12

17 3 4 13

15

1.

Amplifier Output - Terminal strip containing all the Gold Seal speaker outputs.

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.

MIC/AUX/TEL PRECEDENCE - Screw terminal connections that allow externally controlled muting of individual inputs.

5.

WMT-1A - RCA connection for Bogen model WMT-1A 600 ohm balanced line matching transformer.

6.

TAPE OUT - RCA unbalanced output, pre EQ and master volume.

(Post Lo-Cut filter, see #14 below).

7. TO PWR AMP - RCA connection provides a high impedance, unbalanced signal level output as a feed to high impedance inputs of other external amplifiers.

8. AX - Variable control for adjusting the amount of Aphex Aural Exciter effect.

9. PRE OUT - RCA unbalanced output from preamp/mixer stage for connection to external signal processing equipment (used in conjunction with POWER IN and LINK switch).

10. POWER IN - RCA unbalanced direct input to power amp stage for connection to external signal processing equipment (used in conjunction with PRE OUT and LINK switch).

11. LINK - Switch that makes or breaks the internal connection between preamp/mixer stage and power amp stage when used with external signal processing equipment.

12. AUX 2 - RCA unbalanced input for dedicated Aux 2 input.

13. MIC 1 to 4 - Balanced XLR connectors for dedicated microphone inputs.

14. LO CUT FILTER - Enables or disables low frequency roll off (65 Hz) for all microphone inputs.

15. PHANTOM (MIC 1 to 4) - Individual switches enable or disable phantom power to each of the 4 dedicated microphone inputs (MIC 5 and MIC 6 phantom power selection — see page 6).

4

Features

Rear Panel (GS-250)

1 14 22 8 21 2 16 18 19 20

7 23 10 9 11

6

12

17 13 3 4 5 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. MIC 5/TEL - Dual function Screw terminals for either balanced microphone or 600 ohm balanced input from telephone page port.

20. MIC 5/TEL - Switch selects mode of operation for MIC 5/TEL input.

21. ALC - Variable control to adjust the amount of automatic level control applied to the TEL input (works only in the TEL input mode).

22. VAR MUTE - 4 Switch selectable levels of Aux input signal muting during TEL page (works only in the TEL input mode).

23. Fan - 3 speed fan for efficient cooling (GS-250 only).

5

Input Connections

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.

MIC 1- 4

2 1

3

2 1

3

2 1

3

2 1

3

1 — GND

2 — +

3 — –

MIC 1 through 4 utilize female XLR-type microphone connectors. A slide switch located above each XLR connector is used to supply phantom power for condenser microphones.

MIC 5/TEL

source to the AUX 1 RCA jack (only works when the

AUX 1/MIC 6 switch is in the AUX1 position).

AUX 2

The AUX 2 input uses an RCA plug and accepts input from a dedicated

AUX source.

Phantom Power for MIC 5 & MIC 6

A single internal jumper is provided to supply phantom power to both MIC 5 and MIC 6. The amplifier is shipped with the jumper in the OFF position. See the figure below for the location of the phantom power jumper.

MIC 5 and MIC 6 input terminal strip

The MIC 5/TEL input is designed to accept input from a microphone or from a telephone line. A slide switch is provided to select MIC 5 or TEL input. To connect a microphone, place the MIC 5/TEL switch in the MIC position. Use two conductor shielded cable and connect the cable shield to the center GND terminal. To use the TEL input, place the MIC 5/TEL switch in the

TEL position and connect the 600 ohm telephone paging source (dry signal only - no DC voltage) to the MIC

5/TEL screw terminals.

MIC 6/AUX 1

The MIC 6/AUX 1 input is designed to accept input from a microphone using terminal strip connections or from a high level auxiliary source such as a tuner or

CD player using the AUX 1 RCA jack. A slide switch is used to select input type. Connect a microphone to the screw terminals labeled MIC 6 (works only when AUX

1/MIC 6 switch is in the MIC 6 position). Use two conductor shielded cable and connect the cable shield to the center GND terminal. Connect an auxiliary input

6

Phantom Power Jumper Location For

Mic 5 and Mic 6

Warning

Removal of the amplifier cover exposes internal components and presents an electrical shock hazard. For this reason, do not perform any functions requiring removal of the cover of the amplifier unless you are qualified to do so. Always disconnect AC power from the unit before attempting to remove the cover.

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. A customer-supplied normally-open SPST switch, push-to-talk switch, microphone switch, relay or telephone system contact can be used to provide the closure.

Note: Activating the precedence control for Aux inputs completely mutes the input signal. The

VAR MUTE control has no effect when muting inputs using precedence control.

7

Output Connections

Output Terminal Strip

4

Ω Output LINK shorting clip

Shorting Clip - Leave for unbalanced output lines.

Remove for balanced output lines

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).

Note: Shorting clip between GND/COM on the speaker output terminals strip must be installed to use this feature.

Speaker systems are connected directly to the speaker output terminals on the rear panel. Connect one speaker lead to the COM terminal and the other to the terminal corresponding to the impedance of the speaker system. Select only one of the output types.

For ground-referenced output operation (unbalanced systems), leave the shorting clip between COM and

GND. For special applications that require floating outputs (balanced systems), remove the shorting clip between COM and GND.

To use the DIRECT OUT (4-ohm) output, remove the shorting clip across the LINK terminals and connect one lead to the 4

Ω terminal and the other to the GND terminal. The GND/COM shorting clip should remain in place.

Note: Shorting clip between GND/COM on the speaker output terminals strip must be installed to use this feature.

Pre Out/Power In Jacks

These jacks permit the insertion of signal processing equipment into the signal path between the preamp output and the power amp input. The LINK switch should be in the IN position for normal operation. When using external signal processing equipment, place the switch in the OUT position and connect

PRE OUT to the signal processing equipment’s input. Connect the POWER IN to the signal processing equipment’s output.

Note: Ensure that the LINK switch is in the IN position when NOT using external signal processing equipment.

Note: Ensure all input and output wiring is correctly installed. If using the 4-ohm output, be sure to remove the 4 Ω output LINK shorting clip.

Tape Out

The TAPE OUT jack provides a line level output to feed a tape recorder. The output is not effected by the Master volume control or EQ, however, the output is affected by the microphone inputs’ Lo-Cut filter.

WMT-1A

This RCA output jack, when used with a Bogen WMT-1A Line Matching

Transformer accessory provides a

600 ohm output to feed a remote amplifier or a telephone line. Refer to the instructions provided with the

WMT-1A accessory for connection information.

Note: Shorting clip between GND/COM on the speaker output terminals strip must be installed to use this feature.

8

Operation

Power Switch

The POWER switch applies power to the unit. The switch will illuminate when power is on.

Individual Volume

Controls

Each input is controlled by an individual volume control.

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.

Dual Function Acoustic Equalizer

The unique dual-function equalizer can be used for acoustic shaping or for feedback control.

The overall volume is controlled by the

MASTER volume control.

Lo-Cut Filter

The Lo-Cut filter on the rear panel provides 3dB attenuation @ 65Hz on the microphone inputs. This helps reduce mic breath pop, wind noise, and rumble.

Contour Switch

This switch enables or bypasses the variable loudness contour.

This feature only effects the AUX inputs.

This feature is designed to improve richness of sound by restoring the high and low frequencies that the ear is insensitive to at low volume levels. The effect diminishes as volume is increased.

Aphex Aural Exciter

The front panel APHEX AURAL

EXCITER switch enables or bypasses the Aphex Aural

Exciter feature. This feature effects all inputs when enabled.

Note: When the switch is placed in the OUT position, the equalizer is bypassed for a flat response.

Acoustic Shaping Mode

When the switch is set in the ACOUSTIC EQ position, full range equalization (10 bands on 1 octave centers starting at 62.5Hz) is provided with a boost/cut of

12dB. In this mode, the equalizer can be used to compensate for room acoustics, or to satisfy the listening preference of the user.

Feedback Control Mode

When the switch is placed in the FEEDBACK CON-

TROL position, the equalizer can be used to reduce feedback and increase the effective gain of the system.

In feedback control mode, the equalizer provides increased control of frequencies between 125Hz and

8KHz. The 10 bands are located on 2/3 octave centers with 12dB cut/boost on each band.

By regenerating the upper harmonics, this audio enhancement system recreates the presence and realism that is lost in the audio amplification process. This results in increased presence and clarity, increased intelligibility, greater perceived loudness (without using extra power), and reduced listener fatigue.

9

Operation

Telephone Paging Control

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).

VOX

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.

The Tel input mode uses voice activated triggering for muting the AUX inputs and automatic level control for providing constant paging level. To optimize Tel input performance the ALC control may need to be adjusted.

The VOX control should be set so that only the desired signal is above the threshold level, while unwanted noise is below it.

ALC

The TEL input features an automatic level control (ALC) which compensates for different voice levels and speaking styles of the individuals using the system. The amplifier is shipped with this control in the OFF (max. counterclockwise) position.

To adjust the ALC:

1.Rotate the MIC 5/TEL and MASTER controls to the highest level likely to be used.

2.Speak softly and distinctly into the telephone mouthpiece while adjusting the MIC 5/TEL volume control to the desired output level.

3.Speak in a loud voice directly into the telephone mouthpiece while rotating the ALC control clockwise to the point where the output of the amplifier is reduced to the same level as that obtained in

Step 2.

4.The MIC 5/TEL and MASTER controls can be used to vary the overall volume without upsetting the ALC adjustment.

To adjust the sensitivity of the VOX circuit:

1. Rotate the VOX control fully clockwise. While making a public address announcement and talking at a low level, the sound should not be choppy or missing parts of words. If it is choppy or intelligibility is poor, rotate control counterclockwise to the point where the sound is clear and crisp (but not to the maximum counterclockwise position).

2. If the background music shuts down when no page is in progress, rotate the control clockwise until the music will not shut down when no page is in progress.

VAR MUTE

The VAR MUTE control mutes the

Aux input(s) only during telephone pages.

The control allows the user to select from 4 levels of muting: 1 = -60dB, 2 = -21dB, 3 = -10dB, 4 = 0dB.

10

Troubleshooting

Amplifier will not turn ON.

No output on 70V, 25 VCT, or 25V.

No telephone output.

Aux input will not mute with telephone page.

Microphone squeals or hums when using the 3-pin connectors but not when using screw terminals.

Condenser Mic will not work.

Telephone input cuts off the music, when not making a page.

Telephone input is choppy or cuts off the beginning of a page.

The telephone page volume is too loud on some pages.

AUX 1 input not working

On the GS-35, GS-60, GS-100 and GS-150, depress the circuit breaker reset button.

On the GS-250, check the fuse. Replace fuse only with same type and rating.

Check that the LINK switch on the rear panel is in the IN position or external signal-processing equipment, if used, is functioning and connected properly.

Make sure that the 4 Ω output LINK shorting clip is in place.

Make sure that the MIC 5/TEL switch is in the TEL position.

Make sure the VOX control is set properly

When connecting the telephone Tip & Ring, make sure to use the two outside terminals and not the center terminal (GND).

Check that the VAR MUTE control is not set to 4 (0dB).

This control adjusts the level of the background music when making a page. See page 10.

Check your wiring connections for the 3-pin connector.

Pin 1 is the shield connection. Pins 2 and 3 connect to the balanced signal leads on the mic cable.

Make sure that phantom power switch (MIC 1 - 4) is on.

See page 6.

Mic 5 and 6 use circuit board jumper. See page 6.

Adjust the VOX control on the rear panel to eliminate any unwanted noise that may be triggering the VAR MUTE circuit

See page 10.

Adjust the VOX control counterclockwise to make the trigger activate at a lower input signal level. See page 10.

Adjust the ALC control on the rear panel. See page 10.

Make sure MIC 6/AUX 1 switch is in the AUX 1 position.

Make sure the signal source is plugged into the AUX 1

RCA jack.

11

Warranty

.

Bogen's Gold Seal Series amplifiers are warranted to be free from defects in material or workmanship for three

(3) years from the date of sale to the original purchaser. Any part of the product covered by this warranty that, with normal installation and use, becomes defective will be repaired or replaced by Bogen, at our option, provided the product is shipped insured and prepaid to: Bogen Factory Service Department, 50 Spring Street,

Ramsey, NJ 07446, USA. The product will be returned to you freight prepaid. This warranty does not extend to any of our products that have been subjected to abuse, misuse, improper storage, neglect, accident, improper installation or have been modified or repaired or altered in any manner whatsoever, or where the serial number or date code has been removed or defaced.

THE FOREGOING LIMITED WARRANTY IS BOGEN'S SOLE AND EXCLUSIVE WARRANTY AND THE PUR-

CHASER'S SOLE AND EXCLUSIVE REMEDY. BOGEN MAKES NO OTHER WARRANTIES OF ANY KIND,

EITHER EXPRESS OR IMPLIED, AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS

FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED AND EXCLUDED TO THE MAXIMUM EXTENT

ALLOWABLE BY LAW. Bogen's liability arising out of the manufacture, sale or supplying of products or their use or disposition, whether based upon warranty, contract, tort or otherwise, shall be limited to the price of the product. In no event shall Bogen be liable for special, incidental or consequential damages (including, but not limited to, loss of profits, loss of data or loss of use damages) arising out of the manufacture, sale or supplying of products, even if Bogen has been advised of the possibility of such damages or losses. Some States do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from State to State.

Products that are out of warranty will also be repaired by the Bogen Factory Service Department -- same address as above or call 201-934-8500. The parts and labor involved in these repairs are warranted for 90 days when repaired by the Bogen Factory Service Department. All shipping charges in addition to parts and labor charges will be at the owner's expense. All returns require a Return Authorization number.

02/22/2005

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Technical Specifications

Power Rating (RMS):

GS-35 — 35 watts

GS-60 — 60 watts

GS-100 — 100 watts

GS-150 — 150 watts

GS-250 — 250 watts

Frequency Response:

Transformer Output — 65Hz to 20KHz +0/-2dB @ -2dB

Direct — 20Hz to 20KHz, +0/-1dB @ rated power

Distortion:

Direct — 0.5% (max.), 0.3% (typ.), 20Hz to 20KHz

Transformer — 0.5% (max.), 0.3% (typ.), 65Hz to 20KHz @ -2dB

Signal-to-Noise Ratio:

Fundamental — -94dB or better;

Aux 1 & 2 — -70dB

Tel — -70dB or better @ 600 ohms

Mic 1 - 6 — -60dB or better @ 200 ohms

Inputs/Outputs:

Mic — 6 Lo-Z balanced via 4 XLR connectors and 2 screw terminals.

Sensitivity: 0.35mV (200

Ω)

Aux— 2 Hi-Z RCA jacks. Sensitivity: 0.085V (10Kohms)

Telephone — Screw terminals. Sensitivity: 0.07V (600 Ω)

Output to Power Amp — 5V @ Rated Output via RCA jack

Power In/Pre Out — In 1V/Out 1V via RCA jacks

WMT-1A Output — 25V @ Rated Output via RCA jack

Tape Output — 687mV @ Rated Output via RCA jack

Output Impedance: Balanced or unbalanced 8-ohms, 25V, 25VCT, 70V; 4-ohm direct unbal.

Output Regulation: Better than 2dB from no load to full load

AC Input Voltage: 120V AC

AC Current:

GS-35 — 0.9A

GS-60 — 1.3A

GS-100 — 2.2A

GS-150 — 3.0A

GS-250 — 5.0A

Variable Mute Range: 4 steps, -60, -21, -10, 0dB (Aux 1 & 2)

ALC: Distortion: less than 0.5%; Compression: 25dB

VOX Threshold: Input 20mV (VOX control max. CW position)

Mic Precedence: -60dB (via terminal strip Mic 1, 2, 3, 5/Tel, 6/Aux, Aux 2

Loudness Contour: +8dB @ 100Hz, +4dB @ 10KHz (Aux 1 & 2 control at 1/4 CW position)

Aphex Aural Exciter: Type A9

Overload Protection: Electronic with automatic reset

Thermal Protection: 105°C (220°F) thermistor attached to heat sink

Line Fusing: Resettable circuit breaker (GS35/60/100/150),

Slo-Blo Fuse 7A/125VAC (GS250)

Dimensions: 16.5”W x 3.5”H x 12”D All Models

Shipping Weight:

GS-35 — 19 lb.

GS-60 — 24 lb.

GS-100 — 28 lb.

GS-150 — 31 lb.

GS-250 — 33 lb.

Bogen® is a registered trademark of Bogen Communications, Inc.

APHEX® is a registered trademark of Aphex Inc.

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50 Spring Street, Ramsey, NJ 07446

Tel. 201-934-8500 Fax: 201-934-9832 www.bogen.com