The subwoofer power cord for 240 is different than 120.

BTW, I power 2x500, 1x800, 1x1000-8, 1x1000-2, 1x1500-2, 2xDSP, active LFR1100, 2xQS10, Onkyo, PS3, wireless router, cable modem all from a single power bar. I've turned it up louder than my ears can stand in my 4200 cu.ft. space and even with the lowest lows, the voltage at the power bar is rock solid.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated