Is a 20 Amp circuit enough to run a small home theater?\nHow much do you really need to run a small home theater?\n\nEx:\nAVR 7.1.4 Surround\nAmp (600 watt?)\nSub\nHome Theater Seats\nBlu-Ray Player\nProjector\nYou will want to pay attention to how much power each piece of equipment draws. I would be looking at higher-sensitivity speakers, if possible. \n\nI would also very much go for multiple subswoofers, and large ones too. The reason is it takes less power to produce bass with multiple subs- it's far more efficient. To get double the output from a single subwoofer, you need four times the power. For example, if your sub is using 10 watts to play at 90 dB and you want to double the SPL (in other words, you now want 96 dB), you need to increase the wattage to 40 watts. However, if you simply add a sub, that grants you an additional 6 dB for only half the power draw increase. Large subs are more sensitive than small subs, so a modest amount of wattage will go further with them. I would look at getting a couple of 15"s if it is in your budget. \n\nAlso look into good light control for your room, so you don't need a light cannon of a projector to get a good image. A good, bright screen can help here too, by giving you a nice vivid image without needing a ton of wattage going to the bulb.