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.
Specifics:
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     
 S/N Ratio (Awtg): >60dB (1 watt 4 Ohm) >99dB (125 watts 4 Ohm)
 Note: All specifications are for each HTX2