Bogen GS250D Specifications
• 4 dedicated MIC inputs
• 1 selectable MIC/TEL input
• 1 selectable MIC/AUX input
• 1 dedicated AUX input
• 4-ohm, 8-ohm, 25V, 25VCT, and 70V
transformer-coupled outputs
• Rack mountable – 2RU package
• Dual-function, 10-band graphic equalizer
(Acoustic EQ or Feedback Control modes)
• True loudness contour function
• Audio Enhancement circuit for improved
intelligibility
• Switchable phantom power supply (13V DC)
• Variable AUX input muting
• Remote master volume control capability
• Automatic level control
• Input muting via contact on all inputs
• Voice activated AUX muting on TEL input
• AUX fade back after TEL page
• Pre-amp Out/Power amp In (insert) connections
• Booster amp output connection
• Tape output connection
• Balanced line driver output
(using WMT1A accessory)
• Low-cut filter for MIC channels
• Listed to UL Standard 60065 for U.S. and Canada
• Rack Mounting Kit (GSDRPK; sold separately)
• Remote Volume Control (GSRVC; sold separately)
• Security Cover (GSTRC; sold separately)
The Gold Seal Series amplifiers are designed to meet the rigorous requirements of today’s sophisticated sound
systems. They combine unique and useable features with ultra high reliability and professional performance.
The amplifiers are available in 250 and 150 watt models, each with exactly the same features to provide power
and performance no matter how large or small the application.
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.
In addition to its extensive flexibility, the Gold Seal Series amplifiers provide a combination of features not found
in other commercial amplifiers. The Gold Seal Series amplifiers also offer Class D Amplification for increased
operating efficiency.
Features
Description
Gold Seal Series
Public Address
Amplifiers
Models GS250D & GS150D
Specifications subject to change without notice.
©2016 Bogen Communications, Inc.
54-8023-67A 1601
Technical
Specifications
Architect
& Engineer
Specifications
The amplifier shall be a model _____, rated at ____ watts RMS
(GS150D/150 watts, GS250D/250 watts).
The amplifier shall accommodate up to 6 Lo-Z balanced microphones, 2 Hi-Z auxiliary sources and a telephone paging input
(MIC 5 shall be switch-selected for MIC or telephone line; MIC
6 switch-selected for MIC or AUX 1). MIC 1 through 4 shall use
XLR-type connectors; AUX inputs shall be via RCA phono jacks
and all other connectors shall use pluggable screw terminals.
Phantom power shall be supplied for use with condenser microphones. Microphone precedence connections shall be included
for MIC 1, 2, 3, 5/TEL, 6/AUX 1 and AUX 2.
The amplifier shall provide a frequency response from 65 Hz to
20 kHz +0/-2 dB at rated power. Distortion shall be 0.3% typically.
The amplifier shall include an Audio Enhancement circuit, variable
loudness contour control, and dual function equalizer. The
equalize
r shall be switch selectable for feedback control or
acoustic shaping and shall include 10 center-detent slide controls providing ±12 dB of boost or cut from 62.5 Hz to 16 kHz in
acoustic mode and from 125Hz to 8 kHz in feedback control mode.
The amplifier shall include automatic level control to provide
consistent output regardless of who is paging, automatic muting
complete with a VOX circuit, and a variable mute level.
Provisions shall also be included for remote volume control,
using an accessory control unit (GSRVC).
Outputs shall be provided for 4- and 8-ohm speakers and for
25V, 25VCT, and 70V distributed systems. Additional outputs
shall be provided to feed a booster amp and tape recorder.
A dedicated output shall permit feeding a 600-ohm telephone
line using an accessory transformer (Model WMT1A).
A Preamp out/power amp in circuit shall be provided to insert
signal processing equipment.
The amplifier shall be rack mountable using an accessory rack
panel kit (GSDRPK). It shall carry the necessary safety agency
listings for both the US and Canada.
www.bogen.com
4 3
2 1
REMOTE
MSTR
MIC1
MIC2
MIC3 AUAUX2X2
MIC5
TEL
MIC6
AUX1
PRECEDENCE
CLASS 2 WIRING
ACCEPTABLE
WMT1A
TO PWR
AMP
LINK
OUT IN
TAPE
OUT
www.boge n .com
AE
ALC
VOX
VAR
MUTE
1
2 3 4
OUT
IN
AUX 1
–MIMIC 6
AUX2
AUX1
ON O FF
ON O FF
ON O FF
ON O FF
PHANTOM
MIC 6
MIC
5 /
TEL
MIC 5–
TEL
MIC
POWER I N
PRE OUT
GND
GND
COM
COM
CT
25V
4
8
70V
25V
+
GND
---
+
GND
---
COM
LO CUT
Power Rating (RMS):
GS150D:
150 watts;
GS250D:
250 watts
Frequency Response:
Transformer Output:
65 Hz to 20 kHz, +0/-2 dB
Distortion:
Transformer Output:
0.5% (max.), 65 Hz to 20 kHz
Signal-to-Noise Ratio:
Fundamental:
-70 dB or better; AUX 1 & 2: -70 dB; Tel: -70 dB or better @ 600 ohms
MIC 1 through MIC 6:
-60 dB or better @ 200 ohms
Inputs/Outputs:
MIC:
6 Lo-Z balanced via 4 XLR connectors and 2 pluggable screw terminals
Sensitivity:
0.35 mV (200 ohms)
AUX:
2 Hi-Z RCA jacks. Sensitivity: 0.085V (10k ohms)
Telephone: Pluggable
Screw terminals. Sensitivity: 0.07V (600 ohms)
Output to Power Amp:
5V @ Rated Output via RCA jack
Power In/Pre Out:
In 1V/Out 1V via RCA jacks
WMT1A Output:
25V @ Rated Output via RCA jack
Tape Output:
700 mV @ Rated Output via RCA jack
Output Impedance: All models: balanced or unbalanced 4-ohm, 8-ohm, 25V, 25VCT, 70V
Output Regulation: Better than 2 dB from no load to full load
AC Input Voltage: 120V~ 60 Hz
AC Current:
GS150D:
2.50A;
GS250D:
4.0A
Thermal Emissions (Full Power):
GS150D:
136.6 BTU/hr.;
GS250D:
239.1 BTU/hr.
Variable Mute Range: -60, -21, -10, 0 dB (AUX1 & 2)
ALC: Distortion: less than 0.5%; Compression: 25 dB (TEL)
VOX Threshold: TEL Input 20 mV (VOX control max. CW position)
MIC Precedence: Via pluggable terminal strip. -60 dB: MIC 1, 2, 3, 5/TEL, 6/AUX, AUX 2
Power In/Pre Out: In 1V/Out 1V via RCA jacks
Phantom Power: 13V DC
Lo-Cut: 3 dB@100 Hz
Loudness Contour: +8 dB @ 100 Hz, +4 dB @ 10 kHz (AUX 1 & 2 control at 1/4 CW position)
Overload Protection: Electronic with automatic reset
Thermal Protection: Thermistor attached to heat sink
Dimensions: 16-1/2" W x 3-1/2" H x 13-1/2" D
Shipping Weight:
GS150D:
18.5 lb.;
GS250D:
19.5 lb.
COM
REMOTE
MSTR
COM
MI
MI
5 /
25V
CT
25V
4
8
MIC6
MIC2
MIC3
PRECEDENCE
MIC5
COM
AUX1
TEL
MIC1
CLASS 2 WIRING
70V
ACCEPTABLE
WMT1A
TO PWR
AMP
POWER IN
PRE OUT
www.bogen.com
LINK
OUT IN
TAPE
OUT
LO CUT
OUT
IN
1
ALC
VOX
AE
VAR
MUTE
2 3 4
AUX2
AUX1
AU
ON OFF
ON OFF
4 3
GND
---
GND
PHANTOM
MIC
TEL
---
ON OFF
2 1
MI
ON OFF
TEL
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