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 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