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RM7970291076531026

This is Assembeld and tested amp boar L12 power amplifier board uses FET output, each channel uses a pair of IRFP140, IRFP9140 high power, high current field effect transistor   IRFP140 parameters: 100V, 33A, 140W.   IRFP9140 parameters: 100V, 21A, 180W.     Self-contained rectifier filter circuit, input AC power supply directly.   The L12 is designed with a non-coupling capacitor input and the input signal voltage is protected from DC.   It adopts 25A rectification full bridge, 2pcs 50V6800UF Japan original filter capacitors. L12 parameters: Dimensions: PCB length 150MM, width 70MM     height: 58MM (including capacitor, solder joint) Weight: 180g Supply voltage: AC15-0-15 to AC 32-0-32 V, Output power: 100W 8R *2,     200W 4R *2,       300W 2R*2, Full Bridge BTL 400W   8R *1         (BTL adapter board required)    (AC32-0-32) THD+N < 0.008% 50W, 1K HZ, <0.02% 50W 10K HZ, <0.1% 50W 20K HZ. Output current: > 15A Damping coefficient > 40 Gain GAIN=34 Input sensitivity = 1.2V (output 40V signal) Frequency response: 8HZ -3DB, 200K HZ -3DB. 20HZ-20KHZ -1DB. Installation Note: Insulation sheets are required for MOSFET high power   transistors .   The 10R series 0.1UF ZOBEL network needs to be connected in series to the output speaker terminal + - end,  which is equivalent connect to the positive and negative ends of the speaker.       connect draws: