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Don't go into clipping and check for back-EMF [message #34863 is a reply to message #34862]

Thu, 24 January 2002 02:28

Wayne Parham
Messages: 18784
Registered: January 2001

Illuminati (33rd Degree)

Check to see if this is caused by back-EMF from the woofer. Certainly, the solution is to refrain from clipping the amp. But I'd like to know if, when the woofer is decoupled from the circuit, the piezo "buzz" goes away. I've heard 'em "chirp" from back-EMF in certain implementations. So try either bi-amplification to decouple the two systems, or simply temporarily removing the woofer from the system for a "chirp test."

This situation was covered in some detail in the post called "More piezo stuff - high order networks, etc."

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[Message index]

		piezo buzzing when amp clips. By: Andy G on Wed, 23 January 2002 18:27
		Don't go into clipping and check for back-EMF By: Wayne Parham on Thu, 24 January 2002 02:28
		there is nothing on the woofer at all... By: Andy G on Thu, 24 January 2002 14:04
		Back-EMF solutions for piezos By: Wayne Parham on Thu, 24 January 2002 16:51
		Further.. By: Andy G on Thu, 24 January 2002 15:04

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