I have been using the Felix mostly with a Remic Red microphone. Sometimes a Troll or the Remic Green. But in general just microphones. When I first got my Felix I did a bit of blending with a Lifeline pickup. It sounded great and had plenty of output, but my amplification needs are pretty minimal so out of ease of setup I've gone with just the mic nearly all the time. I've been messing about with the piezos again and have been surprised to find the output on the Lifeline is now woefully low. As in, I have to crank the gain all the way up to get any kind of signal. Seems like something went bad with my pickup. I bought another Lifeline here on TB to try out and same results. I then bought a Headway Band here and same results. So that got me wondering if there is a problem with the Felix. That was answered by having a guitar player in my band staying after rehearsal last night, plugging a piezo equipped guitar in and having no problems at all. What has me scratching my head is that my AI Clarus does just fine with the Lifelines. So in a nutshell... what pickups are you using and getting good results from? Thanks!