i Baught a Technics SU-A600 off ebay, and as soon as i wired it in the 1st thing that hit me was that it sounded rather "flat" this is my 1st setup so i dont know if im perhaps expecting too much, i know the speakers arent great but iv tired a few diferent sets and its just full of high and upper mid sounds, the large drivers in the speakers are barely been driven, the amp plays loud and everything okay but just seems sound like its lacking the some "power" ?