The Bogen HTA Professional Series Power
Amplifiers are high-performance units employing
state-of-the-art Power MOSFET technology. The
characteristics of Power MOSFETS make them
ideally suited to power amplifier design, providing
far superior performance and reliability compared
to other types of transistors. They afford higher
efficiency, reduced heat, simpler overall design,
reduced size and weight.
The Model HTA125A supplies 125 watts (RMS
continuous output) at less than 0.5% total har-
monic distortion from 20 to 20,000 Hz. An input
signal of only 500mV is required for full rated out-
put. The input impedances are: high-impedance
(50,000 ohms) unbalanced; low-impedance
(500/600 ohms, balanced or unbalanced) with
optional accessory transformer Model TL600. Line
bridging can be achieved with an optional trans-
former Model TL100. Residual hum and noise is at
least 90dB below rated output and the output reg-
ulation is better than 2dB from no load to full load.
The HTA125A can drive a variety of load imped-
ances: outputs include 4 ohms, 8 ohms, 25 VCT and
70 volts. It is capable of safely driving any recom-
mended load continuously. The HTA125A is ther-
mally protected to prevent damage due to exces-
sively high temperatures; however, the amplifier
will deliver the full rated power output continu-
ously, even at +131ºF (+55ºC). Additional failure
protection devices include electronic overload lim-
iting, short circuit protection, and a Slo-Blo fuse.
Electronic shutdown circuitry is automatically acti-
vated if an overload or short circuit occurs and a
front panel overload shutdown LED illuminates.
Once the cause has been rectified, the unit auto-
matically resets. The power on/off switch, located
on the front panel, illuminates when the power is
on.The rear panel contains an input level control,
input and output connections, the AC line fuse, and
an auxiliary receptacle. A low-cut filter switch is
located internally.
• Power MOSFET circuitry
•
Capable of continuous operation at rated output power
•
Frequency response ±1dB, 20 to 20,000 Hz at full rated output
•
Distortion less than 0.5% THD, 20 to 20,000 Hz
•
Multiple output voltages/impedances available
•
Automatic overload protection
Features
Description
Specifications subject to change without notice.
© 1996 Bogen Communications, Inc.
Part No. 54-7790-04R2 Printed in U.S.A. 011 0
Power Amplifier
Models HTA125A
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