NJbob Posted March 7, 2007 Share Posted March 7, 2007 Can anyone tell me what the effeciency of the LS with the K43 is. I found out my pr had them instead of the K33. I was wondering because of the bad performance of my 2a3 amp. I measured the drivers they were all 5.9 to 6.1 ohm Thanks Quote Link to comment Share on other sites More sharing options...
Guest " " Posted March 7, 2007 Share Posted March 7, 2007 I have this in my k-43 driver info folder - this was previously posted on the forum but is hard to find K-43 spec TSPs Fs 36 Hz Re 3.4 Ohms Qts 0.314 Qms 5.314 Qes 0.333 Vas 198.474 L Sd 0.089 m^2 Xmax 0.29 in BL 15.94 It is a 400 Watt woofer with a Sensitivity of 98.5@ 2.83V/1M. Freq response is 45 to 3,500 Hz and has a 3 in voice coil Quote Link to comment Share on other sites More sharing options...
Guest " " Posted March 7, 2007 Share Posted March 7, 2007 One of many for compare PART # K-33 RE OHMS 3.39 LE MH .96 FS HZ 34.46 QE .410 QM 7.39 QT .390 VAS LTRS 301.66 XMAX MM 8.20 BL TM 11.88 MMS GMS 78.59 CMS mm/N .2714 RMS NS/M 2.3037 SD SCM 889.59 EBP 84.4 EFF % 2.91 SPL dB 96.6 Wattage 150rms Quote Link to comment Share on other sites More sharing options...
Guest " " Posted March 7, 2007 Share Posted March 7, 2007 here's one for the k-33-e to compare Mfg: Klipsch Mdl: K-33-E Nomz: 4 Ohms Revc: 3.5 Ohms Levc: 1 mH SPLo: 92.3 SLPi: 91.13 SLPi: 91.71 @ Vg = 2V Qms: 8.5 Qes: 0.684 Qts: 0.633 no: 1.07% ni: 0.81% F0(Fs): 27.99 Hz Fi: 26.17 Hz BL: 9.77 Tm Sd: 0.089 M^2 Vas: 0.343 M^3 Xmax: 4.00 mm Cms: 305 uM/N Mms: 106 g Pmx: 100 W Quote Link to comment Share on other sites More sharing options...
Guest " " Posted March 7, 2007 Share Posted March 7, 2007 some more for the k-33 for compare purposes PART # K-33 RE OHMS 3.39 FS HZ 34.46 LE MH .96 MMS GMS 78.59 QM 7.39 CMS mm/N .2714 QE .410 RMS NS/M 2.3037 QT .390 VAS LTRS 301.66 XMAX MM 8.20 SD SCM 889.59 BL TM 11.88 EBP 84.4 EFF % 2.91 SPL dB 96.6 Wattage 150rms 1981 k-33 Re = 3.39 Ohms Zmax = 46 Ohms @ Fs = 35 Hz Ro = 46/3.39 = 13.57 Z = Re*SQRT(Ro) = 3.39 * SQRT(13.57) = 3.39*3.683=12.5 Ohms Fh=49Hz @ Z=12.5 Ohms Fl=25Hz @ Z=12.5 Ohms check >> SQRT (Fh*Fl) = SQRT (49*25) = 35Hz = Fs (good numbers) Here are the T/S parameter calculations- Qms = Fs * SQRT(Ro) / (Fh - Fl) = 35* SQRT(3.68) / (49-25) = 5.37 Qes = Qms / (Ro-1) = 5.37 / (13.57 - 1) = .427 Qts = Qms * Qes / (Qms + Qes) = (5.37 * .427) / (5.37 + .427) = .395 Quote Link to comment Share on other sites More sharing options...
colterphoto1 Posted March 7, 2007 Share Posted March 7, 2007 You might have the LS Industrial version there. They came stock with the K43 woofers. Quote Link to comment Share on other sites More sharing options...
Guest " " Posted March 7, 2007 Share Posted March 7, 2007 Can anyone tell me what the effeciency of the LS with the K43 is. I found out my pr had them instead of the K33. I was wondering because of the bad performance of my 2a3 amp. I measured the drivers they were all 5.9 to 6.1 ohm Thanks I sent you an email about the LaScala senerio that uses the K-43, which normally includes the AL xover. If you want to use the LaScala's with a low power amp, best bet would be to put some AA or A xovers in them. While a lot of home users do not like the AL, I think it has it's place with high powerd amps in high output senerios. Quote Link to comment Share on other sites More sharing options...
NJbob Posted March 7, 2007 Author Share Posted March 7, 2007 So it looks like I had it backward Quote Link to comment Share on other sites More sharing options...
Guest " " Posted March 7, 2007 Share Posted March 7, 2007 "You might have the LS Industrial version there. They came stock with the K43 woofers." I had a set of regular 1976 LaScala's that had K-43's in them, but of course, they may have been installed later in the game. Quote Link to comment Share on other sites More sharing options...
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