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Yeah, you need to match the Pot to the impedance of the piezo as closely as you can. 2 megohms - is going to be as close as I can guess without measuring the piezo myself. It might come as a 'standard value' 2.2 meg. That'll do fine.
The problem occurs if you are planning on running a piezo into an ordinary guitar amplifier without some kind of pre-amp to buffer it.
The input impedance of the guitar amp will be much lower than the impedance of the piezo and ruin the tone you hear.
A small pre-amp to buffer against this problem is the 'correct' way to go. A pair of matching piezos wired together in series (and in phase of course) can help alleviate the problem greatly.
I'm in the process of doing this too ... survival of the neatest, eh? LOL
Yup, guess it is.
Hopefully I can put a few glass slides out and about too since I bought the diamond cutoff wheels too.
Naz Nomad said:I'm in the process of doing this too ... survival of the neatest, eh? LOL
are you adding just the vol pot or will you be doing vol and tone?
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