35 dB maximum gain with 2 x 20 watt output at 4 Ohms. Dual RCA stereo mini jack and high-level inputs. High pass filter at 120 Hz to reduce bass distortion in smaller speakers. Aluminum housing with integrated heat sink. Power inputs include either three-pin Euroblock or barrel connector. 12-volt trigger for automatic on/off functions when source power is detected. Included SA202-RDT accessories: universal pole- and surface-mount adaptor 15-volt power supply. Designed for the FP series speakers.