Bartolini Gain Piezo Buffer (AGBP/918)

Firstly, unless I'm very much mistaken, this piezo preamp is not specifically for BASS (as Thomann's listing implies). It's for any high-impedance, low-level piezo-type pickup. I'm actually using it to preamplify a Schatten HFN pickup which I fitted to one of my guitars - and which turns out to produce a very low-level signal, which is also very treble rich (internet comments confirm this). This Bartolini preamp is not much bigger than a sugar cube, so I was able to glue it on to the back of the existing preamp, "steal" 9v power for it, and also add some passive EQ (R/R/C) to its output before feeding into the existing preamp. So that's a piezo buffer and +12dB of gain all added invisible inside the guitar. It solved by problem perfectly. Recommended!