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In Reply to: Re: Is it wise to lower the lf cutoff ? posted by djk on November 03, 2000 at 16:05:00:
I've got a pair of 1977 vintage La Scalas.I've also got a pair of Eminence Kappa 15LF's with the following T/S parameters:
Fs- 39.6Hz
Qts- .38
Re- 5.42
BL- 18.61
Sensitivity- 101dB/watt/meterI believe them to be close to the Klipsch K-43s, except the 15LF's have a higher Re.
Will these work in the La Scala along the lines of your previous post?
I'll be using them with a SET. Any suggestions would be much appreciated.I also have a couple of pairs of TAD 2001's. But thats another story. :-)
Thanks in advance,
-Steve
Follow Ups:
None of the stock Eminence Delta,Kappa,etc series drivers will work.The K43Es that I have measured has Fs=31hz and Qts=.25,the TS parameters that Klipsch hands out are bogus.The EV DL15W has an Fs=30 and Qts=.23 and the JBL 2205 has an Fs=30 and Qts=.21 .After taking into consideration the dc resistance of the woofer inductor and the output impedance of the amplifier the optimum Qts for the vented LaScala would be .312 with a Vas of 10.5 cu ft and an Fs of 30hz.
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