Orlando, you need clarify your question.
Obviously you are interested in upgrading or updating your amp and preamp, but are you wanting to do it yourself and need a source for parts or advice, or do you want to find someone with the necessary skills do the upgrades for you?
Obviously you are interested in upgrading or updating your amp and preamp, but are you wanting to do it yourself and need a source for parts or advice, or do you want to find someone with the necessary skills do the upgrades for you?