Posted by Wayne Parham [ 192.35.232.241 ] on August 21, 2006 at 18:02:40:
In Reply to: Re: I' m too cheap posted by telegraph.hill on August 07, 2006 at 10:40:02:
Leland is talking about using piezoelectric tweeters. The way he's using them is to listen for HF created by the leading and trailing edge of a clipped signal. If you put a low frequency sine wave into an amplifier, the output signal will also be a low frequency sine wave that can't be heard from a piezo tweeter. But once the amp starts to clip, the sharp edges generated are high frequency so they can be heard with a piezo. That's how Leland plans to use piezos to tell when his amps begin to clip.
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