HELON-SERIES 1-Channel 1x 825 WRMS an 4 Ohm 1x 1650 WRMS an 2 Ohm 1x 3300 WRMS an1 Ohm digital MONO high-power-amplifier and SMD technology Low Pass Filter Subsonicfilter continuously adjustable 0-180°Phaseshift up to 84% effiency possible RTC included Bass Boost @ 45 Hz with 0 – 12 dB Dimensions 227 x 59 x 184 mm