JBL CLUB A600 Mono subwoofer amplifier 350 watts RMS x 1 at 4 ohms 600 watts RMS x 1 at 2 ohms 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