Thanks TLS, Peng & 3Db.\r\nOne advantage here is the distributor for bw & marantz is the same company.\r\nI just spoke to the bw service centre & they told me to try & swap with another 6004\r\nBut my dealer is a real p***k & insists that if it "turns on" then everything should be ok with the receiver & that he wont swap it! \r\nHe even says if I need to max out the 60\/120 hz on the eq then thats just the way I should have it!!\r\nBut he is prepd to send it over to the bw service centre for a check.\r\nSpeaking to the guy at the service centre, he aslo recmmends I send it over.\r\n\r\nSo I think im just going to give that a try & request a feq resp test as suggested.\r\n\r\nSo folks a tad late for this but if the 683 are a bit too hungry for this, are there any 3 way BW speakers u could recommend for this receiver. I didnt like the 684s because of no mid bass when I tried them on a similar marantz SR6005.\r\n\r\nBut I really like these BW, infact Im sure that baby yamaha will probably drive these better than my 6004 :(\r\n\r\nAnother question, guys is it true that hi end audio amps are very very flat & so dont artificially boost the bass, but if your ears have heard such boosted stuff your whole life then u dont like the flat sounding stuff??