Questions about piezo super tweet [message #16109] |
Sun, 08 February 2004 09:25 |
BillEpstein
Messages: 886 Registered: May 2009
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Illuminati (2nd Degree) |
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I put an 8 ohm resistor across the posts of the KSN-1038. What did that do? Doesn't seem to attenuate. Is it limiting any frequencies? What about a small cap in series? Will that attenuate or smooth it but still let it go high? Us bats want to know?
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Re: Questions about piezo super tweet [message #16110 is a reply to message #16109] |
Sun, 08 February 2004 10:39 |
Bill Martinelli
Messages: 677 Registered: May 2009
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Illuminati (1st Degree) |
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try putting a 1uF or 2uF cap in series to it. Then put the Piezo where it belongs. Go get the little Fostex. I have read good things about them lately. You need the low down on the pizza from Wayne. They are backwards critters and he can tell ya eggzactly how to cross them and attenuated them. amico
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Re: Questions about piezo super tweet [message #16113 is a reply to message #16111] |
Sun, 08 February 2004 16:01 |
Bill Martinelli
Messages: 677 Registered: May 2009
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Illuminati (1st Degree) |
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Good info Wayne, I was off base with 2uF as 1 doesnt doo much attenuation itself 1.0uF 1dB 0.5uF 2dB 0.33uF 3dB 0.22uF 4dB 0.1uF 7dB Do yo have specs for what resisters will bring the crossover up higher from the natural 3500hz of the device? Bill
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Re: Questions about piezo super tweet [message #16120 is a reply to message #16119] |
Mon, 09 February 2004 14:19 |
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Wayne Parham
Messages: 18783 Registered: January 2001
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Illuminati (33rd Degree) |
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Transformer coupling was a standard practice on the early units. It is still done by some, but be careful not to push the voltage increase too far. High turns ratios - above about 6dB gain - will increase distortion. I use piezo tweeters on the smaller entry level speakers that are only about 96dB/M/W. So I don't need to increase their sensitivity. But if I were to consider the use of transformers, I would not go much past about 100dB/W/M. If higher output is needed, I'd go with a different tweeter than the KSN1038 or similar units.
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