boom3 Posted June 3, 2018 Share Posted June 3, 2018 I've followed the threads about the Cornwall 1/1.5/II and also the interesting account of Klipsch buying the Heppner tooling for the K-79, etc. It got me thinking, why did the CW II go with the K-79 and not keep the K-77, and following that thought on, if the K-79 is better than the K-77 (some think it is) why didn't Klipsch start using the K-79 across the entire Heritage line? Quote Link to comment Share on other sites More sharing options...
garyrc Posted June 5, 2018 Share Posted June 5, 2018 I eagerly await the answer, too. Just a guess, but I'll bet the K-79 isn't efficient enough to match up with the La Scala II or the Klipschorn, without lowering their overall efficiency/sensitivity lower than desired. If I remember correctly, the Khorn and La Scala of 1977, when Don Keele Jr. did the chart (in Dope from Hope), were 2.85 to 3 times as efficient as the Cornwall of that time, in the sense that 1 watt into a Khorn produces the same SPL as 2.85 to 3 watts into a Cornwall. Quote Link to comment Share on other sites More sharing options...
HDBRbuilder Posted June 5, 2018 Share Posted June 5, 2018 8 hours ago, garyrc said: I eagerly await the answer, too. Just a guess, but I'll bet the K-79 isn't efficient enough to match up with the La Scala II or the Klipschorn, without lowering their overall efficiency/sensitivity lower than desired. If I remember correctly, the Khorn and La Scala of 1977, when Don Keele Jr. did the chart (in Dope from Hope), were 2.85 to 3 times as efficient as the Cornwall of that time, in the sense that 1 watt into a Khorn produces the same SPL as 2.85 to 3 watts into a Cornwall. Makes sense to me...fully-horn-loaded vs.NOT fully-horn-loaded...the Cornwall woofer is gonna need more wattage to make up for the lack of the horn lens with its compression slot...whether it has ports lending the woofer a hand or not. Quote Link to comment Share on other sites More sharing options...
JRH Posted June 6, 2018 Share Posted June 6, 2018 Efficiency is the right answer (isn't it always). The K-79 is running full-bore in the Cornwall. It would have had to be stepped up for the K-horn / LaScala, and that would have resulted in a power handling issue. 1 Quote Link to comment Share on other sites More sharing options...
boom3 Posted June 9, 2018 Author Share Posted June 9, 2018 Thanks all. Quote Link to comment Share on other sites More sharing options...
geoff. Posted June 10, 2018 Share Posted June 10, 2018 But isn’t the newer K-107-ti (K-79 with titanium diaphragm and tractrix lens) 3db more efficient than the stock K-79? If so, that’s the ticket, the K-107-ti can be safely crossed lower than the K-77. Does anyone have the specs on the three for comparison? Quote Link to comment Share on other sites More sharing options...
garyrc Posted July 10, 2018 Share Posted July 10, 2018 I hope someone has the specs on all three. Although the K-77 was crossed over at 6K for decades, it is now crossed over at 4.5K in the Klipschorn, but with a steeper slope to protect it. EV used to cross it over (when it was the T35) at 3.5K at 12 dB per ocvtave. Quote Link to comment Share on other sites More sharing options...
BRockyC Posted September 22, 2018 Share Posted September 22, 2018 Question 1: what network type was used in the CW2s? I recently required a set of CW1s and wish to keep the drivers, k33e (square), k55v, and k77m (square). My CW1s have type B network. Question 2: is the type B2 the last evolution of the network for my drivers? Quote Link to comment Share on other sites More sharing options...
OO1 Posted September 22, 2018 Share Posted September 22, 2018 - Quote Link to comment Share on other sites More sharing options...
BRockyC Posted September 22, 2018 Share Posted September 22, 2018 Thank you... Time to do some soldering... : ) Quote Link to comment Share on other sites More sharing options...
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