TB is plenty of threads concerning E.F. I know... but my situation is a little uncommon: looking for an envelope/autowha that works with a bass with piezo PU only Obviously I have tried dod fx25...and I love that kind of sound, but does not work with my bass (maybe with the way I touch the strings). Need a warm, old fashioned, bubbling, envelope. Price does not matter so much. Tanks in advance.