I own a Sony STRDG-800 receiver and KLH surround sound system with 8" 125watts powered sub. When I was watching Transformers the movie it sounded like my sub was going in and out. Expecialy at the major action parts when they have music in the backgound. I know I do not have the best setup that money can buy, I am just starting out and need some help making what I own for now work the best that it can untill I can afford better stuff.