My Sony XBR is on the same 20 amp dedicated circuit, but a different outlet.
The XBR and my Def Tech 250 watt sub are both plugged into a Monster PowerBar 1100 ( i think its the 1100), and they are drawing only an amp or two. (EDIT; it is a Monster Powerbar 2100)
This 20 amp circuit was put in just for the home theater stuff. In Hindsight, I wish I had run a total of 3 20 amp circuits, but who knew......
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Panasonic TC-P65S1 65" Plasma HDTV, Marantz AV 8801 Preamp, Outlaw 7700 Amp, Klipsch RF7 (X-over dean G modded) RC7 (X-over Dean G modded) RS7 CDT-5800C speakers, Outlaw LFM1 EX Subwoofer, Oppo BDP-93, B & O Turntable, Toshiba HD-A2, Sony CD & DVD 400 disc jukeboxes, DirecTV HD-DVR, PS2, PS3, Wii, Harmony one remote, Monster PowerBar 1200 for the TV, sub, PS3, HD DVD and Wii, Tripp Lite Isolation Bar for the Amp, Pre-Amp and other sources.