Lightweight power amplifiers in a 19" rack-mountable housing for generating high sound pressure levels in medium to large sound reinforcement systems. H-series amplifiers employ a new hybrid class-H architecture, which combines the streamlined efficiency of a digitally controlled power section design with the power delivery and stability of a professional class-H output stage. Comprehensive internal protection monitors any thermal or overload conditions, automatically mutes at power on/off and provides active inrush limiting. A digital display continually shows the supply voltage, internal temperature and output level. A fully balanced signal path has 3 switchable input sensitivity levels to match different audio sources and the amplifier section can be set to operate in Stereo, Parallel or Bridge modes. A switchable 120Hz low-pass filter can be selected for use with subwoofers, avoiding the need for a separate crossover and saving additional expense and rack space. Speaker outputs can be connected using 1 or 2 Speakon leads as required. H-series amplifiers provide immediate and dynamic power on demand for sound contractors and PA installers that need dependable service with optimum sound quality.Power supply[tab]200-240Vac, 50Hz (IEC)[br]Amplifier : construction[tab]Hybrid Class-H[br]Protection[tab]Short/open circuit, thermal, RF, DC fault, on/off mute, active inrush[br]Frequency response[tab]20Hz-20KHz ±0.5dB[br]THD +N[tab]0.2%[br]S/N ratio[tab]-95dB[br]Damping factor[tab]>700[br]Input sensitivity[tab]1.0V - 1.4V - 2.0V switchable[br]Input impedance[tab]20KΩ (balanced),10KΩ (unbalanced)[br]Crossover[tab]Switchable full range or fixed 120Hz low-pass filterDimensions[tab]483 x 361 x 44 mm (1U)[br]Fuse[tab]T8AL 250V[br]Power rms @ 8 Ohms[tab]2 x 600W[br]Power rms @ 4 Ohms[tab]2 x 900W[br]Power rms @ 2 Ohms[tab]2 x 1200W (40ms burst 1kHz sine)[br]Power rms bridge @ 8 Ohms[tab]1800W[br]Power rms bridge @ 4 Ohms[tab]2400W (40ms burst 1kHz sine)[br]Weight[tab]7.0kg