Ok, I know this isn't a CBG, but I couldn't find a place to post this (even though I thought there was once a Stompbox Forum/Group). I have been working on this Stompbox off and on for far too long. It works, but isn't deep sounding at all (more like a snare pop). I have tried dampening and all sorts of things (short of using a different box).
I got the idea to sire a small speaker in series with the piezo, but can't figure out how to make it work. When wiring direct to the jack it's a one or the other thing. Check out this video (and sorry for futzing around one handed on camera near the middle).
https://www.youtube.com/embed/LrWpWh7MGWg
Any suggestions are welcome. Thanks!
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group is here http://www.cigarboxnation.com/group/percusionanyone?
but i'm sure others can chime in on this post too .
you could copy your post and post it there also .
i got pretty good results with a rod piezo under pressure inside a wedge box .
i built up a brace and laid the rod ontop so it was "pinched" under the lid , and took a harder hit when stomped on . i also hot glued the entire braided wire onto the lid in a spiral pattern . sounded great , even added vol/tone controls . ;-)
Looks like the piezo is directly glued to the lid. Peel it off and try putting something in between, like a piece of a mouse pad etc.
You're trying to drive the speaker from the pre-amp's power? I'm personally not sure how well that would work, so I can't really help in that regard.
That said, if you're trying to give the box more bass, try a 0.022uF ceramic capacitor in parallel with the piezo. If that doesn't cut enough of the treble, you could try an even larger value, 0.047uF perhaps.
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