If you do not own a piece of equipment why buy one you have to modify? Usually modified equipment (unless by very well known experts) is worth less, not more than stock items on he used market and one can rarely recover the price of the mods. I suggest that you read a couple of books on circuit design before making any decision. The VTL book and Valve Amplifiers by Morgan Jones are geared to beginners.
moding and the inexperienced
hi,i'm looking at adcom preamps and from reading alot of posts have begun to be curious about it better caps transformers etc.but i have no elelectrical experience to figure any of this out.does anyone know of some good firms thet do mods for you and are reasonably priced?