I bought a Marantz SR55300 because of the reviews it got on this site. It sounds very very weak. I have to have it about 90% turned up to get any sound out of it at all, my onkyo tx-Sr601 smoked the Marantz in power. Th Marantz has a better sound though. My Speakers are Klipsch reference and I have a 2 channel Sherwood that I tested out and that smoked the Marantz?? What is up? I spent 1 hour on the phone with Tech line and they agreeed that its set up totally right. It sounds like it is really putting out about 20 watts it starts off at volume -75db it doesnt pick up any sound at all not even a whisper until -38 db I even have the speaker levens set at +7 db all around. My onkyo at 80 x 5 coul make my ears bleed this one cant scratch my ear drums, Should I return it? If I return it how much extra is the 10 watts really gonna make between the 5300 and the 6300, its about 150 bucks more. I like Marantz sound alot.