juniper Posted February 8, 2016 Share Posted February 8, 2016 Does anyone have these, and are they as good or the same as the older E models? Quote Link to comment Share on other sites More sharing options...
mustang guy Posted February 9, 2016 Share Posted February 9, 2016 (edited) EDITED POST K-31 T/S parameters from the Jubilee AES paper (Delgado & PWK) Thank you Chris A: Also thank you pzannucci for questioning the earlier T/S specs obtained from an old post of BC. NOTE: The XMAX parameter is a guess made based on the PE rating of 250 watts and FS. It is ONLY a guess. I added these specs to the Klipsch T/S database. Edited February 9, 2016 by mustang guy Quote Link to comment Share on other sites More sharing options...
juniper Posted February 9, 2016 Author Share Posted February 9, 2016 Thanks Mustang Guy!!!!! They look pretty good!! Quote Link to comment Share on other sites More sharing options...
pzannucci Posted February 9, 2016 Share Posted February 9, 2016 I would say there is the possibility that the measurements are suspect unless Bob did both woofers together and not a single woofer which makes no sense (unless testing outside of the enclosure for some reason). Notice the Re value of 3.37. If that was true, paralleling two woofers in a KLF-30 would bring the impedance down around likely 2 ohms. This would crush most amps. The sd is also possibly off since an sd of 95 would be a 13+ inch woofer. I'm not sure what happened there with the measurements but maybe the rest of the data is usable. I wish I had my woofer tester 3 available to test one of them out of my KLF-30. I many possibly try my WT2 instead. Quote Link to comment Share on other sites More sharing options...
mustang guy Posted February 9, 2016 Share Posted February 9, 2016 (edited) PZ, I don't have the speaker, but could they have been wired in serial making them 8 Ohms? Then it would be like a single K-22 or something. pi R2 = 11/2 * 3.14 = ~95 ci that's an 11" cone diam, dd the k22 is ~10.5" As I said, I don't have the speaker, but I'm sure Bob knows how to use a ruler. Who know, maybe he made a booboo... Edited February 9, 2016 by mustang guy Quote Link to comment Share on other sites More sharing options...
pzannucci Posted February 9, 2016 Share Posted February 9, 2016 Very doubtful serial. That would lower the efficiency and Klipsch is all about efficiency. I will see if I can pull one woofer today and see if I am full of hot water. An ohm tester should get close to the Re. Quote Link to comment Share on other sites More sharing options...
mustang guy Posted February 9, 2016 Share Posted February 9, 2016 (edited) Cool. You can change the dd and the sd and see what that does to the other parameters. I'd bet they are 4 Ohm speakers though. I know Bob knows his way around a multimeter. That would shock me. The dd is somewhat subjective, because you can measure the surround from different points. His may be .25" different from the way somebody like Eminence measures. edit: The rubber surround on this woofer should be anything but subjective. check out this pic: deleted pic I could see where the measure points on this 10.5" K-22 might be less: deleted pic Edited February 9, 2016 by mustang guy Quote Link to comment Share on other sites More sharing options...
mustang guy Posted February 9, 2016 Share Posted February 9, 2016 (edited) I think this is a picture of the KLF showing the wiring. It looks like you were right. These would be wired in ll, so the woofers would be 2 Ohm. http://www.avsforum.com/photopost/data/2246639/d/d6/d684e1d7_IMG_0462.jpeg edit: Somebody please get a DCR on one of these drivers... Edited February 9, 2016 by mustang guy Quote Link to comment Share on other sites More sharing options...
pzannucci Posted February 9, 2016 Share Posted February 9, 2016 I did just measure a 1036 from the KLF-20 is very similar and that is 5.8 ohms which makes sense. I would presume the K-31 being between 5.8 and 6.0 ohms. Quote Link to comment Share on other sites More sharing options...
mustang guy Posted February 9, 2016 Share Posted February 9, 2016 (edited) I will update the driver TS and display right now. I also changed to 10.5" diameter. It only affected the VAS. Here goes: OLD: At this point the entire T/S is suspect IMO. How accurate is the QMS if the DCR and the diameter were measured wrong. ugh Edited February 9, 2016 by mustang guy Quote Link to comment Share on other sites More sharing options...
Chris A Posted February 9, 2016 Share Posted February 9, 2016 And the K-31 T/S parameters from the Jubilee AES paper (Delgado & PWK): Chris 1 Quote Link to comment Share on other sites More sharing options...
mustang guy Posted February 9, 2016 Share Posted February 9, 2016 (edited) Awesome Chris. Any guesses on the xmax? As a 250W speaker, I am guessing 8mm? I would like to put something in for ppl designing boxes and needing to know at what signal point max excursion takes place. edit: PS I am going to edit my original response to match yours Chris. I am also going to remove all other responses so this thread doesn't get too clouded. Edited February 9, 2016 by mustang guy Quote Link to comment Share on other sites More sharing options...
Chris A Posted February 9, 2016 Share Posted February 9, 2016 (edited) I didn't find the K-31e 's Xmax, but here's a link to the post where the K-31e's TS parameters were measured with woofer tester on a full Jub bass bin: https://community.klipsch.com/index.php?/topic/82560-k31-and-the-jubilee/?p=885517 Chris Edited February 9, 2016 by Chris A Quote Link to comment Share on other sites More sharing options...
pzannucci Posted February 9, 2016 Share Posted February 9, 2016 My assumption is that being that the efficiency is fairly high and the Fs pretty low (meaning a fairly heavy cone), to get that efficiency it probably has a shorter voice coil thus the 4-5mm is likely correct. Speculation of course. Quote Link to comment Share on other sites More sharing options...
mustang guy Posted February 9, 2016 Share Posted February 9, 2016 (edited) I didn't find the K-31e 's Xmax, but here's a link to the post where the K-31e's TS parameters were measured with woofer tester on a full Jub bass bin: https://community.klipsch.com/index.php?/topic/82560-k31-and-the-jubilee/?p=885517 Chris That explains a LOT. I got the same information from this link from a post Bob Crites made: https://community.klipsch.com/index.php?/topic/80478-k-28-thiele-small-parameters/?p=856378 I think PZ and I have determined that this is incorrect. The data you provided will be used... Edited February 9, 2016 by mustang guy Quote Link to comment Share on other sites More sharing options...
mustang guy Posted February 9, 2016 Share Posted February 9, 2016 My assumption is that being that the efficiency is fairly high and the Fs pretty low (meaning a fairly heavy cone), to get that efficiency it probably has a shorter voice coil thus the 4-5mm is likely correct. Speculation of course. I agree. I am going to make it 5mm and update everything. FYI, here is the old spec page for the KLF-30 for anybody who wants too look that up: https://web.archive.org/web/20121106051807/http://www.klipsch.com/klf-30 Quote Link to comment Share on other sites More sharing options...
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