Power MOSFET Circuitry, Continuous Operation at Rated Output, 20 Hz to 20 kHz Frequency Response, Multiple Output Voltages/Impedances, Automatic Overload Protection The HTA250A from Bogen is a 250W power amplifier that uses MOSFET technology for superior performance and reliability. This versatile amp drives a variety of loads such as 25/70V and 4/8 ohms. The HTA250A has thermal protection to deliver full output even at temperatures up to 131? F. Additional protection is provided by electronic 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.