Dual Band EQ
The unique dual-function equalizer can be
used for acoustic shaping or for feedback
control.
• Acoustic Shaping - Full range equaliza-
tion is provided for correcting general fre-
quency response issues that exist in the
application venue. The full audio spectrum
is covered on 1-octave centers with a
boost/cut of 12 dB. In this mode, the equal-
izer can be used to compensate for room
acoustics, or to satisfy the listening prefer-
ence of the user.
• Feedback Control - In this mode, the
equalizer’s control range is reduced to cover
only the lower half of the audio spectrum
(where feedback howls occur), but the indi-
vidual filters are now on closer 2/3-octave
spacing. This allows narrower bands of fre-
quencies to be controlled, which is particu-
larly useful to reduce feedback of live
sources that can increase the effective loud-
ness the system can achieve.
Variable Music Mute
This feature allows control over the level of
background music (fed though the AUX
inputs) heard during a telephone page
announcement. The convention used to be to
completely mute background music during
pages. The Gold Seal Series amplifiers pro-
vide full muting as well as no muting and in-
termediate attenuation levels of –10 dB and
–21 dB. After the telephone page has ended,
the background music smoothly fades back
to its original level for a very professional
sound.
Telephone Paging Control
Input 5 serves a dual function as either a
balanced MIC input or a 600-ohm balanced
telephone input. The TEL input includes
both voice-activated triggering for muting
the AUX inputs and automatic level control
for providing constant paging level. ALC
compensates for different voice levels and
speaking styles of the individuals using the
system. Controls are provided on the rear of
the amplifier to adjust trigger threshold of
the voice-activated muting so that it will not
falsely trigger from noise on the input. An
ALC adjustment is also provided to allow
control over the amount of compression ap-
plied to loud signals to keep them at a nom-
inal signal level.
Audio Enhancement
Crisp, clean, intelligible sound is the goal of
every paging system. The audio enhance-
ment circuit adds back the high frequency
harmonics that are lost through the hand-
sets and speakers. With one simple control,
you can adjust the amount of high fre-
quency content the audio enhancement
circuit adds back until optimum intelligibil-
ity is reached.
Product Features:
• 35-, 60-, 100-, 150-, and 250-watt models
• 7 inputs: 4 MIC (Lo-Z), 1 AUX (Hi-Z),
1 MIC/TEL, 1 MIC/AUX
• 4-ohm, 8-ohm, 25V, 25VCT, and 70V outputs
• Dual-function, 10-band graphic equalizer
(acoustic EQ/feedback control)
• True loudness contour function
•
Audio enhancement circuitry
• Automatic level control
• Switchable phantom power supply (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
• AUX fade-back after TEL page
• Pre-amp out/power amp in connections
• Booster amp output connection
• Tape output connection
• Low Cut filter for MIC channels
• Thermal and overload protection
• 3-speed cooling fan (GS250 only)
• Rack-mountable w/accessory mounting
kit (2 rack spaces)
• Listed to UL Standard 60065
for US and Canada
Gold Seal Series amplifiers were designed with the sound contractor in mind,
offering professional performance and installation convenience. Each Gold
Seal Series amplifier offers a unique combination of built-in features, ultra-high
reliability, and extensive input flexibility and input options.
Accessories
GSTRC
Tamper-Resistant Cover
GSRPK
Rack Panel
Mounting Kit
GSRVC
Remote Volume
Control
WMT1A
Line-Matching
Transformer
www.bogen.com
41
AMPLIFIERS
Gold Seal Series Amplifiers
GS35, GS60, GS100,
GS150, GS250
PUBLIC ADDRESS AMPLIFIERS
Technical Specifications, Dimensions,
and Weights can be found on Page 79
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