FS: Highest quality Piezo drivers

audiokinesis · 18th June 2009, 10:06 AM

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

adason · 18th June 2009, 04:26 PM

genuine or not, they sound like crap

audiokinesis · 18th June 2009, 05:59 PM

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

adason · 18th June 2009, 06:19 PM

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!

adason · 18th June 2009, 06:23 PM

I opted for this one:
http://www.parts-express.com/pe/psho...48&ctab=1#Tabs

audiokinesis · 18th June 2009, 06:32 PM

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.

audiokinesis · 21st June 2009, 09:51 PM

Sold.

18th June 2009, 10:06 AM	#1
audiokinesis diyAudio Member Join Date: Oct 2007 Location: Preston, Idaho	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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18th June 2009, 04:26 PM	#2
adason diyAudio Member Join Date: Nov 2004 Location: home sweet home	genuine or not, they sound like crap

18th June 2009, 05:59 PM	#3
audiokinesis diyAudio Member Join Date: Oct 2007 Location: Preston, Idaho	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

18th June 2009, 06:23 PM	#5
adason diyAudio Member Join Date: Nov 2004 Location: home sweet home	I opted for this one: http://www.parts-express.com/pe/psho...48&ctab=1#Tabs

18th June 2009, 06:32 PM	#6
audiokinesis diyAudio Member Join Date: Oct 2007 Location: Preston, Idaho	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.

21st June 2009, 09:51 PM	#7
audiokinesis diyAudio Member Join Date: Oct 2007 Location: Preston, Idaho	Sold.

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