High-speed digital circuitry Fully regulated PWM power supply 4-way protection circuit 1? stable stereo Bridging synchronization Variable low pass: 50 Hz-150 Hz Variable subwoofer EQ @ 45 Hz Variable subsonic filter: 15 Hz-40 Hz Phase switch: 0-180 Remote dash mount low-level gain control with cable Freq resp: 15 Hz-150 Hz S/N ratio: 100 dB THD: 0.5% System distress indicator Gold-plated, heavy-duty power & speaker terminals 2400W.