I am looking at getting a triple parallel assembled chip amp from Ebay to drive a subwoofer for a HT. I am currently using a single 3886 on a 4ohm sub.
On the pictures of the boards, there are three trim resistors. I imagine those are to null the offset voltages. My question is how is that done when there are three chips already on the board. I would think it is not easy.
Anyone have experience nulling the parallel arrangement?
LM3886 3 159W Parallel Mono Channel Amplifier Board | eBay
LM3886 X3 parallel Power Amplifier board 150W Assembled | eBay
On the pictures of the boards, there are three trim resistors. I imagine those are to null the offset voltages. My question is how is that done when there are three chips already on the board. I would think it is not easy.
Anyone have experience nulling the parallel arrangement?
LM3886 3 159W Parallel Mono Channel Amplifier Board | eBay
LM3886 X3 parallel Power Amplifier board 150W Assembled | eBay
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