If an aftermarket car Audio system has three amplifiers installed the fuse ratings of 25a, 25a and 50a respectively, what size fuse should go at the battery connection point if these amplifiers are fed by a single large gauge power wire and that is later split up near the amplifiers in the trunk?

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1. If an aftermarket car Audio system has three amplifiers installed the fuse ratings of 25a, 25a and 50a respectively, what size fuse should go at the battery connection point if these amplifiers are fed by a single large gauge power wire and that is later split up near the amplifiers in the trunk?