"John Schutkeker" wrote in message
. 30.44...

I'm designing a system for shattering wine glasses with high intensity
sound, but my design doesn't "feel" right to me, and I need somebody to
tell me if I've forgotten something important. I need an oscilloscope to
measure the resonant frequency of the glass and a frequency generator to
produce it. I need stereo speakers and a stereo amplifier powerful enough
to generate the sound to break the glass.

But how do I correctly get the signal from the frequency generator into
the
stereo amplifier. Do I need a pre-amp, or do I just wire it straight in?
If I need a pre-amp, how do I spec it, on the outputs of the freq
generator
and the input of the amplifier? What if I'm using a receiver with the
pre-
amplifier and the amplifier built-in? Can I just use the pre-amp that was
intended for the turntable?

**You'll find that this task is not as easy as it seems. You'll probably
need a wine glass with a weakened structure and HUGE SPLs. Really HUGE SPLs.
The amplifier is the least of your concerns. I'd be searching for a speaker
with at least 100dB/W/M SPL capability.

I'm guessing you will want to measure the glass's resonant frequency and
drive the sig gen with that frequency. I don't know how you'll measure the
glass's resonant point, without altering. Schrödinger's Cat and all that.


--
Trevor Wilson
www.rageaudio.com.au