Originally Posted by win200
Hmm. Not sure. I'm moving into a new home next month, and I'm starting to think about gear for the movie room. My guess, offhand, would be no.
A lot of new construction is wired with 12/2 Romex. Older construction post 1996 to 2008 will have a white sheath and post 2008 construction will use a yellow sheath. Lights are still wired using white 14/2. Receptacles will most-likely be 15 amp with a slot neutral slightly larger than the slot hot. A 20 amp receptacle will have a T-shaped neutral tilted at a 90° angle. It your wire is 12/2, you can change your 15 amp receptacles to 20 amp provided you also have 20 amp breakers installed. IF your house is to code and you had competent builders, a 20 amp breaker SHOULD also indicate 12/2 wiring even though the receptacles might only be 15 amp. They do this mainly for cost-savings.
You'll first need to determine if you have more than one circuit in the room. Again. If the electricians that built your house are worth their salt, they would have wired a living room with two circuits AND staggered the receptacles so that no two adjacent receptacles would be on the same circuit. My house was built by Mexicans, so the wiring was crap. I basically rewired my entire A/V room and dropped in an extra 100 amps ( 5 x 20 amps ) for good measure.
It is easy to calculate maximum load. It is -- Volts x Amps = Watts. Most of your gear will either list Volts and Amps or Wattage ( Volt/Amps.) Emotiva lists wattage on the back of their amps, so the XPR-5 is 1700 watts maximum, which would be 1700 watts / 115 volts = roughly 15 amps. This should be on its OWN 15 amp circuit and should not be over 12 amps continuous. Sunfire 7201 is 1440 watts, which is roughly 12 amps. I'd put the XPR-2 on its own 20 amp with maybe some other smaller stuff in the room and put the Sunfire on another 20 amp with the rest of your gear. Any subwoofers should also have their own circuit.