HPower is dedicated to enthusiast who like the sound of a proper High-power AB class output design, 2 Ω stable, with over-sized power supply. The sophisticated design with exclusive metallic gray-blue finish and wide heat-sinking surface is a plus for every classy installation. The differential input circuitry  increases rejection of electromagnetic interferences and the Bass Boost, (45 Hz) adjustable at 0 / +6 / +12 dB, improves impact on low frequencies. The mono operating mode allows to create a three-channel sub+front system or a powerful two-channel system. The built-in 12 dB/Oct crossover filters features Lo-Pass and Hi-Pass (from 50 to 500 Hz), to set up a wide range of systems solutions. Thank to ART (Automatic Remote Turn-On/Off) H 604 turn on/off is controlled by the source, via high-level inputs.