How did they set your gains? Did they adjust by ear, set to half and leave it, use a dmm, or did they use a o-scope. After some reading on here for a while, using a o-scope really is teh only real way to set the gains properly. First you need to see at what volume the h/u is clipping ( dirty signal ) at, the set the amplifer gains after that. This really is the only accurate way. Ive gone to shops here local to me and talked to them about amp gains and settings and some of them do it there own way, which is usally by ear.