Just to clarify, the unit you bought from Accessories4Less.com would be one that operates only on the 110/120 volts @ 60hz AC that is standard for all US homes as wall outlets. In our homes only the large odd-looking 3-slot outlets for stoves and electric dryers would be 220 volt.
And by the way, the AVR1912 doesn't "give out" 110 volts, it uses that and converts it down to low voltage for output to the speakers.