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Old 18th June 2009, 09:06 AM   #1
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Default FS: Highest quality Piezo drivers

I have a like-new (no solder, never abused) pair of genuine CTS model KSN-1188 screw-on piezo tweeters. New production, purchased just weeks ago; the smaller KSN-1142 suits my needs better because it doesn't go as low. The KSN-1188 goes down to about 1 kHz in a large horn, is 93 dB efficient and handles 400 watts. Vastly more expensive than cheap-o piezos, and vastly better sounding. No crossover needed if you pair it up with a 93-95 dB woofer rolled off at 1 kHz, or two 87-89 dB woofers in parallel likewise rolled off at 1 kHz. Suitable for home or prosound applications.

$56/pair plus shipping.

http://www.adelcom.net/MOTOROLA_ksn1188a.htm

Here's a document with useful information about crossing over a piezo driver:

http://www.pulsardevelopments.com/pr...l/piezoan.html

You can check out my feedback on Audiogon, username "AudioKinesis".

Thanks for taking a look.

Duke
audiokinesis at yahoo dot com
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Old 18th June 2009, 03:26 PM   #2
adason is offline adason  United States
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genuine or not, they sound like crap
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Old 18th June 2009, 04:59 PM   #3
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Sale pending.

Adason, have you heard this particular driver, and if so have you heard it used properly (with a capacitor and a series resistor)?

It doesn't measure as smoothly as a lot of high quality conventional drivers, but it deviates from flat by having reduced output in the lower treble region so it's not harsh like cheap piezos.

Duke
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Old 18th June 2009, 05:19 PM   #4
adason is offline adason  United States
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Quote:
Adason, have you heard this particular driver, and if so have you heard it used properly (with a capacitor and a series resistor)?
yes, yes, and I returned it!
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Old 18th June 2009, 05:23 PM   #5
adason is offline adason  United States
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I opted for this one:
http://www.parts-express.com/pe/psho...48&ctab=1#Tabs
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Old 18th June 2009, 05:32 PM   #6
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The KSN-1188 goes down almost two octaves lower than that Selenium, and it's usually impractical to roll off the bottom end of a piezo, so if your woofer wasn't rolled off low enough then you had a lot of unwanted overlap.

If you bought the piezo from Parts Express I don't think it was the KSN-1188. To the best of my knowledge they never sold it; only a much cheaper look-alike.
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Old 21st June 2009, 08:51 PM   #7
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Sold.
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