JBL CLUB A600 Mono subwoofer amplifier 600 watts RMS x 1 at 4 ohms 1000 watts RMS x 1 at 2 ohms 2000 total watts RMS x 1 at 4 ohms when strapped to a second Club A1000 Class D amp technology Variable low-pass filter (32-320 Hz, 12 dB/octave) Variable bass boost (0-12 dB at 45 Hz) Phase switch (0, 180 degrees) Wired remote bass control module included Preamp and speaker-level inputs Bare wire to RCA adapters included for high-level input Preamp outputs Dimensions: 12-5/8"W x 2"H x 7-3/4"D Remote bass controller with 16.5' Cable