RCA Low Level Input - Thermal, Short And Overload Protection Circuits - Subsonic Filter (20-50Hz) - High Pass Filter (50-150 Hz) * High Level Input - Fuse:2×20A - 0 to +12dB Variable Bass Boost - Dimensions: 15"(L)x 11.8"(W)x 3"(H) * Green & Red LED Power Status Indicator - RMS Power: 400W×2 + 800W×1 - Low Pass Filter (50-150 Hz) - Weight: 15.2 LBS * Phase shift Switch: 0 or 180 Degree - MAX Power: 800W×2 + 1600W×1 - Subwoofer Gain Remote Control * Soft Delay Remote Turn-On - Subwoofer Gain Control - CH 1/2 Gain Control