hi there one & all, I have a cambridge a300 amp which i recently got fixed at a local repair shop. Thing is, it does't sound the same to me, in fact it sounds decidely dodgy. Is there any way I can check if they've ripped me off by using cheap, crappy replacement transistors instead of the 'proper' ones?? If there is, would be really helpful to know, otherwise just my word against theirs, you know? cheers to anyone who can help me out