RCF SUB 705-AS II Powered Speaker . Compact and potent bass reflex subwoofer, the SUB 705-AS II. It has a powerful 15" high power woofer with a 3" voice coil, a 1400 Watt digital amplifier, and a sturdy plywood enclosure. The tuning is deep and punchy, resulting in a powerful bass. It is simple and quick to set up with a satellite speaker because of the built-in digital stereo crossover (DSP) with customizable crossover frequency. Easy to integrate with 12" and 15", the SUB 705-AS II is perfect for RCF ART and D-Line Series.