Boomzilla Posted December 30, 2012 Share Posted December 30, 2012 Inexpensive piezoelectric tweeters are available (typically 94 dB sensitivity). Has anyone tried using one or two with older La Scalas to supplement the K-77 tweeter? If I remember right, the impedance on the piezos is high and drops with increasing frequency. The crossover was done by putting a resistor in series with the tweeter? Since the typical K-77 rolls off at 15KHz or so, it would seem that a supertweeter might help. Who has tried this, and where might I find a crossover chart for typical pizo tweeters? Thanks - Boomzilla PS - Happy New Year! Quote Link to comment Share on other sites More sharing options...
Mighty Favog Posted December 30, 2012 Share Posted December 30, 2012 If an older LaScala is sounding dull to you I would seriously look at at least recaping the crossover and maybe replacing the tweeters with Mr. Crites' CT-125's. Those LaScalas should then have the capability of making your ears bleed. Quote Link to comment Share on other sites More sharing options...
djk Posted December 31, 2012 Share Posted December 31, 2012 http://www.audioasylum.com/cgi/vt.mpl?f=hug&m=164114 "Up until a few months ago I would have never believed that piezos could rival much more expensive compression drivers. Anyone who doesn't believe so is WRONG!! Using the proper components tames the harshness and lets the music through with power and clarity!!! after buliding these, I decided that I will use ksn1016s in my heresies instead of the "correct" replacement tweeter. I am that convinced of their ability!!" Quote Link to comment Share on other sites More sharing options...
Islander Posted December 31, 2012 Share Posted December 31, 2012 If an older LaScala is sounding dull to you I would seriously look at at least recaping the crossover and maybe replacing the tweeters with Mr. Crites' CT-125's. Those LaScalas should then have the capability of making your ears bleed. I did both those things and was pleased with the improved sound. The JubScala upgrades came later and were much more expensive. But worth it. Quote Link to comment Share on other sites More sharing options...
djk Posted January 1, 2013 Share Posted January 1, 2013 It should be noted that extending the HF to (beyond) 20Khz and not having a sub makes the LaScala sound even more bass deficient. I started installing the original KSN 1016 in Klipsch speakers in about 1978 and quickly found that while they may measure much better than the K77, that they needed to start gently rolling off above 4Khz or so. A 3dB/oct slope should be about right for the LaScala. Quote Link to comment Share on other sites More sharing options...
Turbox Posted January 1, 2013 Share Posted January 1, 2013 dont think this mod is needed. +1 for a Sub. Quote Link to comment Share on other sites More sharing options...
Guest " " Posted January 1, 2013 Share Posted January 1, 2013 piezo's sound very snaky. only advantage is that they are cheap. One version of the MCM uses a group of piezos in a tweeter stack. PA application, not really an audiophile item of choice. Quote Link to comment Share on other sites More sharing options...
djk Posted January 2, 2013 Share Posted January 2, 2013 "piezo's sound very snaky. only advantage is that they are cheap. One version of the MCM uses a group of piezos in a tweeter stack. PA application, not really an audiophile item of choice." Well spoken for someone that has never heard them with a proper network (mine). Quote Link to comment Share on other sites More sharing options...
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