I think a lot of people plug all or most of their gear to run off one circuit. You are never using all the max power of the gear's spec. I run 2 amp(250 watts), TV, cable box, BDP, avr, SUB amp all off a 15 amp circuit with no problem. The highest I have eve seen the power console/conditioner go was a 960 watts and amp never past 7. I spin off some of the other gear to a second circuit. A 15 amp circuit is capable of 120 volt, around 1800 watts. Unless you have gear that calls for a 20 amp circuit, you should be fine.
Klipsch RF 7 based HT 7.4, Pioneer SC 35, Acurus 200 Five, Dayton 18 Ultimxa Dual Sub Cab(2), Dayton 18 Ultimax Large Vented Sub Cab (2), on Berhinger I Nuke DPS amps, Samsung BDP F 7500, Asus/My Book Live HPC 4 TB
Yaquin VK 2100 amp, McIntosh XR 5 speakers, Samsung BDP F 7500