karlson3 Posted November 29, 2017 Share Posted November 29, 2017 11 years later - did PWK use a ~6" x 13" throat opening ? https://i.imgur.com/6ySyO7m.jpg Quote Link to comment Share on other sites More sharing options...
seti Posted November 30, 2017 Share Posted November 30, 2017 This is a long term project 8-) Quote Link to comment Share on other sites More sharing options...
karlson3 Posted November 30, 2017 Share Posted November 30, 2017 yes - its multi generational - I'll check back in another 11 (if not pushing up daisies) Quote Link to comment Share on other sites More sharing options...
karlson3 Posted December 1, 2017 Share Posted December 1, 2017 according to hornresp, I could flatten LB76's response by using one of my M151 15s. LB76 would need 1 pi and a sub. Still could be a fun project. Reducing the back chamber volume to 25L would flatten response a bit further plus allow 200W into M151 without ever exceeding 5mm excursion. What size throat opening did PWK use on LB76? if 3" x 13" - would that be best with a driver like M151 ? - the patent IIRC indicated larger than 3" in the narrow dimension and look 6 inches https://i.imgur.com/gbV4xeP.jpghttps://i.imgur.com/mQtF4w4.jpg here's a comparison between a 0.83 scale Belle with 12pe32 and LB76 with M151 Quote Link to comment Share on other sites More sharing options...
karlson3 Posted December 3, 2017 Share Posted December 3, 2017 it appears LB could be vented when using some lower Q 15 - here's an example with a JBL M151 using 44L for the vented case and 25L for the sealed back chamber - how the vented version would sound vs sealed back chamber = ? - any guesses in home use? Here's a comparison of a stock Belle/K33E to LB loaded with JBL M151 and vented Quote Link to comment Share on other sites More sharing options...
moray james Posted December 5, 2017 Share Posted December 5, 2017 Quote Link to comment Share on other sites More sharing options...
firesisle Posted January 29, 2019 Share Posted January 29, 2019 I own the original pair of lb76 speakers. I purchased them from Bud Edmonds about 35 years ago. The serial number is KYSN, a radio station started by Edmonds here in Colorado Springs. Anybody have an idea what they're worth? Quote Link to comment Share on other sites More sharing options...
JohnA Posted January 29, 2019 Share Posted January 29, 2019 If you can prove that, gobs. Since the LB-76 never went into commercial production, the price could be up there. Please measure the throat size and post it here for posterity. Also, please consider donating them to the Klipsch Museum of Audio History for a tax deduction and so other can enjoy them. Quote Link to comment Share on other sites More sharing options...
JohnA Posted February 4, 2019 Share Posted February 4, 2019 Please post pics! Quote Link to comment Share on other sites More sharing options...
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