HTA250A Bogen Power Amplifiers

The Bogen HTA Power Amplifier Series are highperformance units employing Power MOSFET technology. The unique characteristics of Power MOSFET circuitry 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 HTA250A Model supplies 250 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 (50k ohms) unbalanced; low impedance (500/600 ohms, balanced or unbalanced) with optional accessory transformer Model TL600. Line bridging can be achieved with optional transformer Model TL100. Residual hum and noise is at least 90 dB below rated output and the output regulation is better than 2 dB from no load to full load.
The amps can drive a variety of load impedances. Outputs include 4 ohms, 8 ohms, 25VCT and 70 volts. The amplifiers are capable of safely driving any recommended load continuously. The HTA Series amps are thermally protected to prevent damage due to excessively high temperatures. 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 the 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.

Specifications

• Rated Output Power - HTA250A - 250W
• Total Harmonic Distortion - Less than 0.5%, 20 to 20,000 Hz at full rated output
• Frequency Response - ±1 dB, 20 to 20,000 Hz at full rated output
• Input Sensitivity - Hi-Z, 500mV; Lo-Z balanced, with optional transformer,150mV
• Hum and Noise - 90 dB below rated output
• Output Loads - 4 ohms, 8 ohms, 25V, 25VCT, 70V
• Output Regulation - Better than 2 dB from no load to full load
• Input Impedances - Hi-Z, 50k ohms unbalanced; Lo-Z, 600 ohms, balanced or unbalanced, and 1:1 bridging with optional plug-in transformers
• Low-Cut Filter - -10 dB @ 100 Hz
• Controls & Indicators
  • Front Panel - Illuminated On/Off power switch and overload shutdown LED
  • Rear Panel - Input level control, Slo-Blo fuse
  • Internal - Low-Cut filter switch
• Power Requirements - HTA250A - 120V~, 60 Hz, 5.5A, 520 watts @ Full Rated Output (Idle 60W)
• Thermal Emissions (full power) - HTA250A - 939.2 BTU/hr
• Overload Protection
  • Electronic overload protection
    • Electrical - HTA250A - 7A Slo-Blo Fuse
    • Thermal - Thermostat
• Auxiliary Receptacle (not switched) - Three-wire grounded*, 300 watts maximum
• Dimensions (without removable feet) - 19" W x 5-1/4" H x 11" D (48.3 x 13.3 x 27.9 cm)
• Front Panel Dimensions - 19" W x 5-1/4" H (48.3 x 13.3 cm)
• Finish - Black
• Product Weight - HTA250A - 50 lb. (22.7 kg)
• Regulatory Approvals - Listed to UL Standard 60065 for US and Canada
• Accessories - Model TL600, 600-ohm line-matching transformer; Model TL100, 1:1 line-matching transformer

HTA250A Specifications PDF

HTA250A Manual