Bogen GA2 User manual

GA2
Bogen Model GA2 is a rugged, compact 1.5-watt
amplifier designed to meet the requirements of con-
tinuous low-power audio applications. It is ideally suit-
ed for telephone line "music-on-hold" amplification. It
can also be used to drive monitor speakers, head-
phones, or as a line amplifier. With accessory trans-
former Model WMT1A connected to the input, the
GA2 will provide amplification for a 600-ohm tele-
phone line.
Model GA2 has a high-impedance input that is avail-
able at both a phono jack and screw terminals. Only
50mV is required for full output.A choice of 8-ohm or
600-ohm output is provided. Low distortion, wide fre-
quency response, and low hum and noise further con-
tribute to excellent performance. A screwdriver-
adjustable volume control is provided on the chassis.
The amplifier is compact and easily mounted on a wall
or in any convenient location.The unit is UL listed.
GA6A
Bogen Model GA6A is a rugged and compact six-watt,
dual-input amplifier with a wide variety of applications
such as background music in a doctor's waiting room,
relaying fast-food restaurant orders from counter to
kitchen, or sound reinforcement in a small church.
The GA6A delivers rated power at not more than 1%
total harmonic distortion from 75Hz to 15kHz into
matched loads. A low-impedance balanced or unbal-
anced microphone input and wide-frequency auxiliary
input are provided, with built-in mixing and individual
front-panel controls. The unit is protected by both
thermal and over-current circuit breakers.
Output connections are easily made via screw termi-
nals on the rear panel.Tone control can be adjusted on
the rear panel, and an illuminated rocker-type front-
panel power switch is provided. The chassis is fabri-
cated from sturdy cold-rolled galvanized steel.
GA2
• Ideal "music-on-hold"/line amplifier
• Only 50 millivolts needed for full output
• Compact — only 5-1/2"W x 4-1/8"H x 2-1/4"D
• UL Listed
GA6A
• Two individual controls: Lo-Z balanced or
unbalanced MIC, AUX
• Built-in mixing
• Internally adjustable tone control
Features
Description
Specifications subject to change without notice.
© 2001Bogen Communications, Inc.
Part No. 54-7767-03R2 Printed in U.S.A. 011 0
General Purpose
Amplifiers
Models GA2 & GA6A
GA2
GA6A

GA2
Power Output: 1.5 watts RMS
Frequency Response: 200Hz to 15kHz
+0dB, -2.5dB
Total Harmonic Distortion: 2% @ 1.5W,
0.25% @ 1W
Output Level: +6dBm (1.5V) across balanced
600 ohms
Sensitivity: 50mV
Input Impedance: 100 kilohms
Hum and Noise: -72dB below rated output
Output Impedance: 8 ohms; 600 ohms balanced
Control: Volume, screwdriver-adjustable
Terminations:
Output — terminal strip
Input — RCA-type phono jack or terminal strip
Power Consumption: 4W, 120V AC, 60Hz
Dimensions: 5-1/2"W x 4-1/8"H x 2-1/4"D
Shipping Weight: 2 lbs.
GA6A
Power Output: 6 watts RMS
Frequency Response: 30Hz to 12kHz +0dB, -3dB
Total Harmonic Distortion: 1% @ rated output
Power Bandwidth: 75Hz to 15kHz
Inputs: Lo-Z MIC, balanced or unbalanced;AUX
Sensitivity: MIC 0.3mV;AUX 0.2V
MIC Dynamic Range: 46dB
Hum and Noise: MIC -50dB;
AUX -64dB below rated output
Output Impedance/Voltage: 8 ohms; 25V and 70V line
Tone Control: 9dB treble boost at 10kHz,
9dB treble cut at 10kHz; internally selectable
Protection: Thermal shutdown and 0.25A fuse
Controls: MIC,AUX, illuminated POWER switch
Terminations:
Outputs and Microphone — terminal strip
Auxiliary — RCA-type phono plug
Power Consumption: 16W, 120V AC, 60Hz
Dimensions: 8-1/2"W x 2-5/8"H x 6"D
Shipping Weight: 5 lbs.
Technical
Specifications
GA2
The amplifier shall be a Bogen Model GA2, or equivalent,
capable of delivering 1.5 watts at 2% THD, and 1watt at
0.25% THD from 200Hz to 15kHz, +0dB, -2.5dB, into 8
ohms. It shall provide one high-impedance input with volume
control, one 8-ohm output, and one 600-ohm output. Input
impedance shall be 100 kilohms. Output level across a bal-
anced 600 ohms shall be 8dBm/2V. Input sensitivity at full
output shall be 50mV or less; hum and noise shall be at least
-72dB below rated output. Inputs shall be via RCA-type
phono jack or screw terminal strip. Output shall be via
screw terminals.
The unit shall operate from 120V AC, 60Hz and shall con-
sume 4 watts.The unit shall measure 5-1/2"W x 4-1/8"H x
2-1/4"D.The shipping weight: shall be 2 lbs.A 5-1/2-foot AC
power cord shall be provided.
GA6A
The amplifier shall be a Bogen Model GA6A, or equivalent,
capable of delivering 6 watts at not more than 1% total har-
monic distortion from 75Hz to 15kHz. Frequency response
shall be 30Hz to 12kHz, +0dB, -3dB.The amplifier shall pro-
vide one low-impedance, balanced or unbalanced micro-
phone input and one high-impedance auxiliary input, with
individual front panel controls and mixing capability.
Microphone dynamic range shall be 46dB with mic sensitiv-
ity of 0.3mV Auxiliary input sensitivity shall be 0.2V or bet-
ter. Hum and noise shall be -50dB for microphone, and
-64db for auxiliary inputs.Tone adjustment shall allow 9dB
treble boost or attenuation at 10kHz, located on rear panel.
Outputs shall be provided on the rear panel for 8-ohm
speaker and 25V and 70V lines. Output and microphone
connections shall be made at rear-panel screw terminals;
auxiliary input shall be via a rear panel RCA-type phono
jack.
The amplifier shall operate from 120V AC, 60Hz, and shall
consume 16 watts. A rocker-type, front panel-mounted
switch shall illuminate when the unit is switched on.
Overload protection shall be by means of a thermally-actu-
ated circuit breaker and a replaceable fuse.The chassis shall
be constructed of zinc-plated galvanized steel with protec-
tive epoxy, and the cover from black vinyl-clad cold-rolled
steel.The front panel shall be finished in black.The unit shall
measure 8-1/2"W x 2-5/8"H x 6"D.The shipping weight shall
be 5 pounds.
Architect
and Engineer
Specifications
50 Spring Street, Ramsey, New Jersey 07446, U.S.A.
Tel. [phone]; FAX: [phone]; www.bogen.com