Hybrid Class-H Power Amplifiers

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.

Hybrid class-H circuit design Digitally controlled and monitored power section Switchable 120Hz low-pass crossover Backlit LCD status display Full internal thermal and overload protection Stable down to 2 Ohms (4 Ohms bridged) Power supply 200-240Vac, 50Hz (IEC) Amplifier : construction Hybrid Class-H Protection Short/open circuit, thermal, RF, DC fault, on/off mute, active inrush Frequency response 20Hz-20KHz ±0.5dB THD +N 0.2% S/N ratio -95dB Damping factor >700 Input sensitivity 1.0V - 1.4V - 2.0V switchable Input impedance 20KΩ (balanced),10KΩ (unbalanced) Crossover Switchable full range or fixed 120Hz low-pass filter