Attenuation for piezo

Tarzan · 21st December 2008, 02:05 PM

Hi, Searched the web but couldn't find a simple document describing the how and why of an attenuator for piezo horns.
Schematic, formula and the like are welcome.
Use is for guitar and bas guitar cabinets up to 400 Watts.
Cheers,
Tarzan

AndrewT · 21st December 2008, 02:15 PM

Hi,
since the piezo is a very effective capacitor, you can use a series capacitor as an attenuating element. I don't know how well this works or how easy/difficult it is to get sounding right.
I have seen quite a few references to using a cap in lieu of a resistive L-pad.

Tarzan · 21st December 2008, 02:22 PM

Hi Andrew,
Yep that's what I've seen too.
But nobody seems to proof their findings with formula's and a reliable way to produce predictable results with different parameters.
Trial and error is a way, but I passed that stage.
Time is not on my side...
(Rolling Stones: http://www.youtube.com/watch?v=Ui1te...eature=related)

21st December 2008, 02:05 PM	#1
Tarzan diyAudio Member Join Date: May 2004 Location: Genk	Attenuation for piezo Hi, Searched the web but couldn't find a simple document describing the how and why of an attenuator for piezo horns. Schematic, formula and the like are welcome. Use is for guitar and bas guitar cabinets up to 400 Watts. Cheers, Tarzan

21st December 2008, 02:15 PM	#2
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, since the piezo is a very effective capacitor, you can use a series capacitor as an attenuating element. I don't know how well this works or how easy/difficult it is to get sounding right. I have seen quite a few references to using a cap in lieu of a resistive L-pad. __________________ regards Andrew T.

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21st December 2008, 02:22 PM	#3
Tarzan diyAudio Member Join Date: May 2004 Location: Genk	Hi Andrew, Yep that's what I've seen too. But nobody seems to proof their findings with formula's and a reliable way to produce predictable results with different parameters. Trial and error is a way, but I passed that stage. Time is not on my side... (Rolling Stones: http://www.youtube.com/watch?v=Ui1te...eature=related)

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