My custom Piezo 'Foam Sandwich" --- Learned how to get the piezo elements out of the RadioShack transducers (#273-073 ?) Mostly noticed that the foam tamed a microphonic pingy response on the top end tail of notes.

1.That's BLue Painters tape.
2. 3M heavy duty foam mounting tape, (not the SUPER dense thin grey stuff, but the foamier white)
3. a paper-thin square of cigar box liner mahogany with the Piezo element gooped in Black Plati-Dip and mounted to the thin wood chip
4.a 3/8th layer of light open cell-foam
5. another square of the thin wood cigar box liner
6.a layer of Neoprene dense closed-cell (mouse pad)

Why? Cause I thought it'd be cool. no idea what all those layers did, but it sure sounds great compared to the plain unprotected piezo element stuck to the neck..

Sounds like a real pick up...shockingly. Just take a few minutes to dial in a sweet spot and -- SWEET!

My Blues Junior amp is great for clean-ish and round acoustic tones. But through a Roland Micro Cube amp with the right amp emu and some effects? Wow! SWAMPY and so recordable!