Built-in amplifier 400 W @ 0.25 ê 0.25 ê 70 mV ? 1.40 V RMS 280 mV ? 5.4 V RMS 8 AWG wire 30 A (ATO or ATC) Slot-ported, Low-profile Black carpet Black Steel Mesh Low-Pass only 12 dB/octave 50 Hz ? 200 Hz optional (RBC-1) 21 in / 533 mm 13.5 in / 343 mm 6.625 in / 168 mm 25.0 lb / 11.34 kg