Well, it is a class d amplifier board with 400Wrms into 4ohm and its called hypex UcD-400HG. Problem that im having is that whenever i connect the board to ac to dc filter board , the resistors starts to heat up very fast where 230v comes in . I already changed relays, resistors, bridge rectifier because i thought these were faulty, also removed big capacitors because i wanted to see if that eliminates the problem but it didn't . So the problem has to be in the main output board . But i don't see any burned components or anything . Its actually two of these ucd400hg boards put together in a single bigger board so the total output is 800Wrms @4ohms
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