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The Bogen HTA-250A Power Amplifier is a high-performance unit employing state-of-the-art
Power MOSFET technology. The unique 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 offer higher efficiency,
reduced heat, simpler overall design, reduced size and weight.
The Model HTA-250A
supplies 250 watts (rms continuous output) at less than 0.5% total harmonic distortion
from 20 to 20,000Hz. An input signal of only 500mV is required for full rated
output. The input impedances are: high-impedance (50,000 ohms) unbalanced; low
impedance (500/600 ohms, balanced or unbalanced) with optional accessory transformer
Model TL-600. Line bridging can be achieved with optional transformer Model TL-100.
Residual hum and noise is at least 90dB below rated output and the output regulation
is better than 2dB from no load to full load. The HTA-250A can drive a variety
of load impedances. Outputs include 4 ohms, 8 ohms, 25VCT and 70.7 volts. The
amplifier is capable of safely driving any recommended load continuously.
The
HTA-250A is thermally protected to prevent damage due to excessively high temperatures;
however, the amplifier will deliver the full rated output continuously, even
at +49?C (+120?F). Additional failure-preventive devices include overload limiting,
short circuit protection, and a Slo-Blo fuse. Electronic shutdown circuitry is
automatically activated if an overload or short occurs and a front panel overload
shutdown LED illuminates. Once the cause has been rectified, the unit automatically
resets. The power on/off switch, located on the front panel, illuminates when
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
- 20,000Hz at full rated output
- Distortion less than 0.5% THD, 20 - 20,000Hz
- Multiple output voltages/impedances available
- Automatic overload
protection
- UL listed
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