Jay Pilkington is a buddy of mine. Awesome player and certified tone monster. He's been totally blind since he was 15, and as a result has some really great ears. He has some good words of wisdom here about dialing in tone on amps.
YouTube - The blind truth about tone/ guitar amps
Also, Jay is one of the friendliest and kindest people you will ever meet. He's had a tough road - really tough. I know it would encourage him to hear some good comments on his video if you feel led to do so - to know that he's helping folks out there in guitar land. This is his first video - he has a lot of great ideas he's going to be sharing on YouTube.
Thanks guys!