mono subwoofer amplifier 400 watts RMS x 1 at 4 ohms (600 watts RMS at 2 ohms) Class D amplifier design with NexD2 switching amp technology Digital Signal Processing: 24-bit 96 kHz digital processing DSP adjustments and settings made via computer, tablet, or smartphone running JL Audio's TüN app 3 Project Levels of tuning: Basic, Advanced, Expert input routing and mixing adjustable gain controls with clip indication fully adjustable high-pass, low-pass, and bandpass filters selectable filter slopes (6, 12, 18, 24, 30, 36, 42, 48 dB/octave) 10-band EQ (graphic in Basic, parametric in Advanced and Expert modes) phase and polarity control time alignment in 0.01 ms (1/8") increments Connection Features differential-balanced inputs eliminate noise coming from your vehicle's electrical system preamp and speaker-level inputs (speaker wire to RCA adapter required for speaker-level input) high-level inputs â€” up to 16 volts RMS (about 60 watts) DC offset or signal sensing auto turn-on eliminates need for remote lead 2-channel digital input and output (S/PDIF: up to 24-bit 192 kHz in, 24-bit 96 kHz out) 2-channel analog preamp output (4V RMS) JLid connections for optional Network Hub, Bluetooth Communicator, and Digital Remote Control USB connection for device running TüN app (6-foot cable included) wiring, fuse, and hardware not included with amplifier 4-gauge power and ground leads and a 50-amp fuse recommended 9-1/16"W x 2-1/8"H x 6-3/4"D