lifter Posted March 17, 2014 Share Posted March 17, 2014 Anyone know the the degree of dispersion from the stock LaScala horn?? I looked on the specs and didnt see it. I am thinking of getting a pair JBL horns (2360A, 2365A or 2366A), but wanted to get the best synergy for the LS.. Thanks 1 Quote Link to comment Share on other sites More sharing options...
moray james Posted March 17, 2014 Share Posted March 17, 2014 LaScala and LaScala ll use the same mid horn. As far as I know they are 90x40 but perhaps others will chime in here. Quote Link to comment Share on other sites More sharing options...
Islander Posted March 17, 2014 Share Posted March 17, 2014 If you want to get the best performance from a La Scala or La Scala II, your best bet is to go with a Jubilee tweeter (K402/K-69 or K510/K-69) and convert it to 2-way. This also calls for an electronic crossover and a pair of matching power amps. It's costly, but it's Klipsch-tested and proven, and the sound will be so fine that you'll forget about wanting any more upgrades. Quote Link to comment Share on other sites More sharing options...
Axz Hout Posted March 17, 2014 Share Posted March 17, 2014 x 1 Quote Link to comment Share on other sites More sharing options...
djk Posted March 18, 2014 Share Posted March 18, 2014 The 80° x 30° is stated as being the 10dB down points, industry standard method for horn specs are for the 6dB down points, so by the accepted industry standard method the K400 is narrower than 80° x 30°. PWK worked for about 40 years before getting an anechoic chamber to do tests in. Most of his early designs were by-the-ear as he couldn't afford a test microphone, spending the money on a frequency generator instead. 1 Quote Link to comment Share on other sites More sharing options...
ClaudeJ1 Posted March 18, 2014 Share Posted March 18, 2014 If you want to get the best performance from a La Scala or La Scala II, your best bet is to go with a Jubilee tweeter (K402/K-69 or K510/K-69) and convert it to 2-way. This also calls for an electronic crossover and a pair of matching power amps. It's costly, but it's Klipsch-tested and proven, and the sound will be so fine that you'll forget about wanting any more upgrades. Agreed. Quote Link to comment Share on other sites More sharing options...
ClaudeJ1 Posted March 18, 2014 Share Posted March 18, 2014 PWK worked for about 40 years before getting an anechoic chamber to do tests in. Most of his early designs were by-the-ear as he couldn't afford a test microphone, spending the money on a frequency generator instead. What is the source of this info? Quote Link to comment Share on other sites More sharing options...
Daddy Dee Posted March 18, 2014 Share Posted March 18, 2014 Lifter, IMO, the best drop in replacement for the LaScala K400/K401 horn is Fastrac Lascala - drop in replacement for K-400 http://www.fastlaneaudio.com/ The sound is very good, to my ears. 1 Quote Link to comment Share on other sites More sharing options...
djk Posted March 18, 2014 Share Posted March 18, 2014 (edited) "What is the source of this info?" PWK in the JAES or JASA, early 40's. PWK felt that the available microphones all had pressure response problems, both known and unknown, and felt his money would be better spent on a good frequency generator. Edited March 18, 2014 by djk Quote Link to comment Share on other sites More sharing options...
Islander Posted March 18, 2014 Share Posted March 18, 2014 Usually, sensitivity is measured at 3 feet or 1 metre, but in those specs, the distance is 4 feet or 122cm. Are any of the other Pro Theater speakers measured like that? I seem to recall some being measured at 10 feet, which would be useful in setting up concert sound, but the 4 feet figure is new on me. Since the La Scala is usually quoted to have 104 dB sensitivity at 1 metre, not 4 feet, could it be that later measurements used more accurate equipment? Or are these numbers always subject to adjustment? Quote Link to comment Share on other sites More sharing options...
djk Posted March 18, 2014 Share Posted March 18, 2014 4' was a standard for many years, and then things went metric. 10' is -9.67dB WRT 1M 4' is -1.715dB WRT 1M EIA is -49.22dB WRT 1M Quote Link to comment Share on other sites More sharing options...
Islander Posted March 18, 2014 Share Posted March 18, 2014 Thanks for the info. That clears it up. Quote Link to comment Share on other sites More sharing options...
DrWho Posted March 19, 2014 Share Posted March 19, 2014 The nominal dispersion of the stock lascala is a misnomer anyway because it varies greatly with frequency. The same is true for the JBL horns you're looking at too. I'd echo Islander's recommendation for the K510 or K402....although it is on the pricier side. If you don't mind collapsing vertical polars, then I'd probably recommend the SEOS18 for a cheaper alternative. Quote Link to comment Share on other sites More sharing options...
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