I've been using a wav4 for several years. Lately I found the sound on the D and G string was slowly deteriorating in the arco setting and with just the bass pieze on. The volume is lower and it sounds a bit fuzzy. This has slowly has gotyte worse over the last year. At this time the sound on the g string has become unusable. My first thought was the treble side piezo was going bad, but the weird thing is the sound in pizz setting is ok. I've wired my wav4 'to have a 3d option with only the bass side piezo on and in that setting the sound has deteriorated in the same way. A logic conlusion would be it's not the treble side piezo. So: I've checked and resoldered all the wiring. Tried a different bridge. Put on a brand new set of obligato's. Fiddled endlessly with the setup. All without any results. Not really surprising because acousticly I can't hear a difference between the e/a side and the D/G side. I just don't understand what is going on here. Please help!