Refurbished HTX2: Class D 600 watt 2-channel amplifier This refurbished item carries a 90-day warranty. Wet Sounds Hydro-Tech X (HTX) Series Amplifier. Wet Sounds represents the ultimate in High Performance Marine Audio. Wet Sounds HTX Series Marine Amplifiers are designed to be a complete solution for every type of extreme marine application. HTX amplifiers use superior performance circuitry by utilizing Class D Power Supplies. These amplifiers have extreme power output packed inside a small chassis, thermal overload protection, flexible crossovers, extended inputs. HTX amplifiers are a well balanced match for all of the Wet Sounds products. RMS Power @ 4 ohm Stereo 150 x 2 watts RMS @ <1.0% THD RMS Power @ 2 ohm Stereo 300 x 2 watts RMS @ <1.0% THD RMS Power @ 4 ohm Mono 600 x 1 watts RMS @ <1.0% THD Input Sensitivity Variable from 0.2V to 6.0V Frequency Response -3dB 20Hz-20KHz Crossover Range Low Pass 50Hz - 250Hz 12dB/Octav Crossover Range Subsonic Filter 50Hz - 250Hz 12dB/Octav RMS Power @ 4 ohm Stereo 150 x 2 watts RMS @ < 1.0% THD RMS Power @ 2 ohm Stereo 300 x 2 watts RMS @ < 1.0% THD RMS Power @ 4 ohm Mono 600 x 1 watts RMS @ < 1.0% THD Input Sensitivity Variable from 0.2V to 6.0V Frequency Response -3dB 20Hz-20KHz