greg928gts Posted June 5, 2008 Share Posted June 5, 2008 http://www.precision-devices.com:80/showdetails.asp?id=48 http://www.precision-devices.com/showdetails.asp?id=14 Greg Quote Link to comment Share on other sites More sharing options...
HarryO Posted June 6, 2008 Share Posted June 6, 2008 http://www.precision-devices.com:80/showdetails.asp?id=48 http://www.precision-devices.com/showdetails.asp?id=14 Greg I'd go with a 4 ohm and a bit more effecientHarry Quote Link to comment Share on other sites More sharing options...
Don Richard Posted June 6, 2008 Share Posted June 6, 2008 Not nearly as well as a K-33. These are 8 ohm speakers. so they will not match up well with any stock Khorn crossover. Also the Qts is too low (should be around .4 -.5) and the resonant frequency is too high (should be lower than 30 Hz.) Here is a website that has K-33 specs: http://www.volvotreter.de/khorn.htm Almost any 15" driver will work and make sounds, but not any old driver will give best results. BEC has replacements that are very,very close, if not exact. Quote Link to comment Share on other sites More sharing options...
Daddy Dee Posted June 6, 2008 Share Posted June 6, 2008 I think the BEC replacements have specs more complementary to the Khorn or other heritage than the current K33. Quote Link to comment Share on other sites More sharing options...
Guest " " Posted June 6, 2008 Share Posted June 6, 2008 I like the SPL. Don't like the lower end frequency response. If they make 4 ohm versions, I'd consider using them in LaScala's. Quote Link to comment Share on other sites More sharing options...
Edgar Posted June 6, 2008 Share Posted June 6, 2008 FWIW, here's what Hornresp predicts for the PD158 in the KHorn (K33E in gray, for comparison).<\P> Quote Link to comment Share on other sites More sharing options...
Edgar Posted June 6, 2008 Share Posted June 6, 2008 And here's the PD1550. Quote Link to comment Share on other sites More sharing options...
greg928gts Posted June 6, 2008 Author Share Posted June 6, 2008 Thanks everyone. The charts are great, not much of a difference between the two really. I wonder how the Crites cast-frame woofers would look overlayed on that chart? Greg Quote Link to comment Share on other sites More sharing options...
Edgar Posted June 6, 2008 Share Posted June 6, 2008 The charts are great, not much of a difference between the two really. Doesn't look like much difference, but they both lose 5-6 Hz on the low end compared with the Klipsch woofer. That's actually a lot. I wonder how the Crites cast-frame woofers would look overlayed on that chart? If you can post the Thiele/Small parameters, I can run it through Hornresp. Greg Quote Link to comment Share on other sites More sharing options...
greg928gts Posted June 6, 2008 Author Share Posted June 6, 2008 Here's what Bob gave me CW1526C cast frame. FS is 26.3, Re is 3.36, VAS is 506.3 Liters, BL is 12.49, QM is 9.93, QE is 0.27, QT is 0.26. Sensitivity is 97 db. Coil is 1 mH. Pmax is 150 watts. Xmax is 7.15 mm, MMS is 75.5 grams, Cms is 0.486 mm/N Greg Quote Link to comment Share on other sites More sharing options...
djk Posted June 7, 2008 Share Posted June 7, 2008 Perhaps you could post the input parameters page you are using in Hornresp? Quote Link to comment Share on other sites More sharing options...
Edgar Posted June 7, 2008 Share Posted June 7, 2008 Okay, here's what Hornresp gives for the CW1526. Again, K33E in gray for comparison. Quote Link to comment Share on other sites More sharing options...
Edgar Posted June 7, 2008 Share Posted June 7, 2008 Perhaps you could post the input parameters page you are using in Hornresp? Sure. The dimensions represent my best estimates, based upon some old Speakerlab K plans that I have. While there is some debate as to the dimensional accuracy of these plans, for the Hornresp parameters they are probably more accurate than my ability to extract the data from them. Also, since all four woofers are being compared in the same context, at least the relative differences between them should be accurate. Quote Link to comment Share on other sites More sharing options...
Bill H. Posted June 7, 2008 Share Posted June 7, 2008 Edgar, Trying to understand the Graph. IF I am reading it correctly , up to 110db both speakers are almost the same...........and who listens at over 110db when the difference, distorstion gets really wide??????????? So either speaker, really would do the job............? Quote Link to comment Share on other sites More sharing options...
Edgar Posted June 7, 2008 Share Posted June 7, 2008 Not quite. The graph shows each woofer's output for a 2.83V input. So the CW1526C plays a few dB louder than the K33E overall, but its frequency response in the horn is very similar to the K33E. If you look at the other graphs posted earlier, you'll see that those woofers are a little louder above 400 Hz or so than the K33E, but that their bass responses drop-off at a higher frequency ... maybe 46-47 Hz vs. 41-42 Hz for the K33E. Since low bass response is what we're trying to get out of the KHorn, this difference is significant. Greg Quote Link to comment Share on other sites More sharing options...
greg928gts Posted June 7, 2008 Author Share Posted June 7, 2008 Yes, I see that quicker drop off, but it's not what I heard with those woofers in the Russian Khorns. Could you plot the graph with the CW1526C and the PD1550? What would putting an 8ohm driver in the Khorn do to the sound? It wouldn't affect the crossover points at all would it? The bass bins naturally roll off at 350 or so anyway and I don't think the woofer would affect the midrange circuitry in the crossover. It would have to simply be a volume difference, but which way? Greg Quote Link to comment Share on other sites More sharing options...
Guest " " Posted June 7, 2008 Share Posted June 7, 2008 " It wouldn't affect the crossover points at all would it?" in an AA type network, because of duplexing nature of crossover networks, it would actually shift if you run numbers through a crossover calculator using the correct impedance, then re-run them using 8 ohms for the woofer, you'll get an approximate idea of the shift. Quote Link to comment Share on other sites More sharing options...
Edgar Posted June 7, 2008 Share Posted June 7, 2008 Yes, I see that quicker drop off, but it's not what I heard with those woofers in the Russian Khorns. When theory and reality disagree, I'd go with reality. Could you plot the graph with the CW1526C and the PD1550? CW1526 in black, PD1550 in gray. Quote Link to comment Share on other sites More sharing options...
BEC Posted June 7, 2008 Share Posted June 7, 2008 Edgar, What Greg sent you earlier was the specs on the CW1526C (Cast Frame) woofer. Here are the numbers for the CW1526 (Stamped Frame) woofer. Bob Crites CW1526 stamped frame FS is 26.3, Re is 3.40, VAS is 437.2 liters, BL is 11.63 Tm, QM is 9.19, QE is 0.36, QT is 0.35. Sensitivity is 95.3 db. Coil is 1 mH. Pmax is 150 watts, Xmax is 7.15 mm, MMS is 87.5 grams, Cms is 0.420 mm/N Quote Link to comment Share on other sites More sharing options...
Edgar Posted June 7, 2008 Share Posted June 7, 2008 What Greg sent you earlier was the specs on the CW1526C (Cast Frame) woofer. Here are the numbers for the CW1526 (Stamped Frame) woofer. CW1526 (stamped) in black, CW1526C (cast) in gray. Quote Link to comment Share on other sites More sharing options...
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