I really loved my Carvin BX1500. (Whoa, that post says I paid "about $600" for it. I actually paid $333 in April of 2017. I think I was confusing it with the purchase of my Warwick 5-string.) But, love or not, it developed a problem a couple of years ago. One of the two amps just...lost low end. For a time I thought I was experiencing a speaker problem. I even replaced a perfectly good GK 15 at one point, only to later realize that it was the amp. I think someone in these forums once suggested that I needed to open it up and blow out the ribbon connections with deoxit or something. Any other opinions? I don't have anyone local I can take it to. Besides, if it's a no-solder, no-parts repair, I should just do it myself.