Bogen Communications HTA250A
Power Amplifier, 250 Watt, 4-ohm/8-ohm/70V

HTA250A

The Bogen HTA-250A Power Amplifier is a highperformance 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.

Features:

• 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

Specifications:

• Rated Output Power: 250 watts rms
• Total Harmonic Distortion: Less than 0.5%, 20 - 20,000Hz
• Frequency Response: ±1dB, 20 - 20,000Hz at full rated output
• Input Sensitivity: High impedance, 500mV; Low impedance balanced, with optional transformer, 150mV
• Hum and Noise: 90dB below rated output
• Output Loads: 4 ohms, 8 ohms, 25VCT (2.5 ohms), 70.7V (20 ohms)
• Output Regulation: Better than 2dB from no load to full load
• Input Impedances:
      * Hi-Z, 50,000 ohms unbalanced; Lo-Z, 600 ohms, balanced or unbalanced
      * 1:1 bridging with optional plug-in transformers
• Low-Cut Filter: -10dB @ 100Hz
• Controls & Indicators:
      * Front panel illuminated power and shutdown LED indicators
      * Rear Panel Input level control, Slo-Blo fuse
      * Internal Low-Cut filter switch
• Power Requirements: 120VAC, 60Hz, 520 watts @ Full Rated Output (Idle, 60W)
• Overload Protection:
      * Electronic overload protection
      * Electrical 7A Slo-Blo Fuse
      * Thermal 105 C (220 F) Thermostat
• Operating Temperature Range: -20°C (-4°F) to +49°C (+120°F) at rated output
• Auxiliary Receptacle (not switched): Three-wire grounded*, 300 watts maximum
• Dimensions (W x D x H w/o feet): 19” x 11” x 5-1/4” (48.3 x 27.9 x 13.3 cm)
• Front Panel Dimensions (W x H): 19” x 5-1/4” (48.3 x 13.3 cm)
• Finish: Black
• Weight: 50 lbs. (22.7 kg)
• Accessories:
      * line-matching transformer (Model TL-600)
      * 1:1 line-matching transformer (Model TL-100)

Our Part #  HTA250A