This will get more response in another forum. Let's see...Amps?, no...Technique?, no...how about STRINGS!!, yeah, that's the ticket!
I know I'm the TI rep, but many players swear by our Acousticore series (AB344 & AB345). They're the only string I know of designed and EQ'd for for use with piezo pickups. The strings are phosphor/bronze rounwound on a nylon core. They do nothing with magnetic pickups, but WOW with piezo's. For online/mail order stores I suggest the following: www.mostring.net (1-877-999-2392) www.juststrings.com (1-800-822-3953) www.bigcitystring.com (203-371-8117) www.kradl.com (815-741-3989) www.elderly.com (517-372-7880) www.mixedcompany.com (678-584-1975) www.melbay.com (1-800-8MEL-BAY) New Age Strings (610-678-3057) http://rfd.cc/bpstrings/ (718-358-1750) http://pub41.ezboard.com/bthedudepit (this one is another bass forum. He carries Roto & TI's) I hope this helps and happy hunting...