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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 harmonic distortion from 20 to 20,000 Hz. 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 TL600. Line bridging can be achieved
with an optional transformer Model TL100. 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 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
recommended load continuously. The HTA125A is thermally protected to prevent
damage due to excessively high temperatures; however, the amplifier will deliver
the full rated power output continuously, even at +131?F (+55?C). Additional
failure protection devices include electronic overload lim-iting, short circuit
protection, and a Slo-Blo fuse. Electronic shutdown circuitry is automatically
activated if an overload or short circuit 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 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
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