[sdiy] preamps for piezos (slightly OT?)

[Busby Bergson]

hi synthdiys,

i'm currently experimenting with contact mics. they sound pretty good going
into a guitar amplifier, directly - but if i want to send them through my
other circuitry, it seems that they require a specialized preamplifier, to
compensate for their impedance.

i've been using something along these lines:
http://music-electronics-forum.com/attachments/4228d1232615609-non-invert.buffer.gif

however, i'm noticing that there is still a significant high-passing -
compared to the bassier direct-to-guitar-amplifier arrangement.

any thoughts?

-  b.b.
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