Power Output @ 4 ohms- 2 x 80 Watts 1 x 240 Watts Power Output @ 2 ohms- 2 x 120 Watts 1 x 400 Watts Bass Boost- 15dB@45Hz Crossover(Butterworth)- HP (50Hz – 250Hz) LP (50Hz – 250Hz) Remote Bass Boost- Yes Subsonic Filter- Variable (10Hz-40Hz) Fuse- 3 x 20 Amp Size- 9.75”(L) 6.5”(W) 2.25”(H) Design Features Hybrid D class output design with discrete Subwoofer output channel (3 & 5 channel models). High Frequency switching power supply allows for greater separation from audible listening frequencies increasing sound quality and lowering THD. Input Inductor power supply isolation protects from unwanted interference in AM/FM reception. Ultra Low ESR high capacity power supply storage bank covers potential fluctuations in power supply demand, increasing efficiency and sound quality. Phillips chip based Class D Technology powers all multi channel XDi amplifiers, producing little or no heat. Embedded protection circuits including Thermal, Current Limit, Rollback DC Offset, Reverse Polarity and Overvoltage.