In my old house, I added a single dedicated 15A circuit for the home theater equipment. In that case, the conduit ran exposed on the exterior of the house from the panel (which was outside) to the double duplex receptacle (which was on an exterior wall). It wasn't pretty, but that was a house that already had wiring run exposed on the exterior for cable and phone. Ideally, new wiring would be concealed in the wall. It is possible (and usually cheaper) to run exposed conduit either inside or outside the house, but it's never pretty.

I've had my powered sub connected without power protection on occasion in the past, but currently I have it on one of the high current outlets of my Panamax. In my case, the sub amp is a much smaller load than that required by a Samson S1000 driving a pair of 15" drivers so it isn't enough to max out the circuit.

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