HCP 4M four channels marine amplifier feature a compact design ready to face the open water environment, providing tons of clean power. The HCP M heat sink has been crafted from extruded aluminium, a material unmatched for lightness, robustness and heat dissipation. To keep size to a minimum, the power transistors are placed between the PCB and the top side of the heat sink where heat is gathered. Built up heat is then directed to the special dissipation “wings” along the side of the amplifier. Both Pre-In and Speaker-In inputs feature a special balanced circuitry, ensuring high rejection against electro-magnetic interferences for noise-free results. The HCP M amplifiers crossover section ensure extreme flexibility: fully adjustable Lo-pass, Hi-pass filters with 12 dB/Oct. and 24 dB/Oct. slopes according to the amplifier model; Bass Boost is also available to enhance low frequencies. The HCP 4 M four channel model features also an extended frequency range filter, which can be used when designing active 2-way speaker systems. Specifications - Distortion - THD (100 Hz @ 4Ω): 0.01 % Bandwidth: 10 ÷ 45k Hz S/N Ratio (A weighted @ 1 V): 103 dB Damping factor (100 Hz @ 4Ω): 120 Pre-In sensitivity: 0.2 ÷ 5 VRMS (15 kΩ) Speaker-In sensitivity: 0.8 ÷ 20 VRMS (47 Ω) Inputs/Outputs - INPUTS: PRE IN / SPEAKER IN Preout FULL range (FRONT): Yes FRONT Ch. filters FULL: Yes FRONT Ch. filters Hi-Pass: 80 Hz @ 12 dB/Oct. FRONT Ch. filters Lo-Pass: 50 ÷ 500 Hz @ 12 dB/Oct. REAR Ch. filters FULL: Yes a REAR Ch. filters Hi-Pass: 80 Hz @ 12 dB/Oct. REAR Ch. filters Lo-Pass: 50 ÷ 500 Hz @ 12 dB/Oct. FRONT Ch. MONO (on/off): Yes REAR Ch. MONO (on/off): Yes BOOST 50 Hz (select): (0 / 6 / 12) dB