I vote for the wall socket. You buy sony, you loose. If you bought them from walmart, return them. Then, goto a flea market and buy either audiobahns or mtx subs for about the same price.
since you've never specified a budget i'll start with the profile ap1200 http://ikesound.com/product-product_id/2214 profile makes solid amps and offer a 3 year warranty i believe and ikesound is authorized.