need help with KD-7319 vu driver board

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Has anyone used a KD-7319 12vdc VU driver board.
I recently bought one to use with a D class amp, connected the Vu side no problem, connected the input to the left, right and ground to the speaker output of the amp and connected the power to the same 12v battery as the amp, Vu meters lit up, no movement of the needles, then smoke from the board, burned resistor, so I would appreciate any help of how to wire one of these
Thanks
 
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