DrTUBE Posted February 23, 2021 Share Posted February 23, 2021 Here is the calibrated impedance curve of one of my HERESY I HBR (S/N°=170Y006) factory stock, with her E-2 Xover : Cheers, 1 Quote Link to comment Share on other sites More sharing options...
Langston Posted May 30, 2021 Share Posted May 30, 2021 (edited) My 2nd post! : ) It's been two years since karlson3 asked if anyone had impedance measurements of the Klipschorn bass bin using the recommended false walls. I have that as well as overlays that replicate his measurements using real walls and no walls. There's excellent correlation between our measurements, which is interesting given that mine involve the cast frame Crites woofer and his may be using the OEM woofers. Bob and now Michael are gifts to vintage Klipsch owners. The measurement legend describes each trace by color. Also included are pictures of the false wall I built for acoustic measurement purposes. As you can see, you really need to use a real room with real walls to measure impedance properly, but those same walls are the enemy when trying to isolate a loudspeaker's acoustic response. Thus I built the false walls since I don't have access to that crazy anechoic chamber with the revolving corner. God bless you and your precious family - Langston Edited June 4, 2021 by Langston 1 Quote Link to comment Share on other sites More sharing options...
OO1 Posted May 30, 2021 Share Posted May 30, 2021 13 minutes ago, Langston said: My 2nd post! : ) It's been two years since karlson3 asked if anyone had impedance measurements of the Klipschorn bass bin using the recommended false walls. all new Khorns have enclosed backs - Quote Link to comment Share on other sites More sharing options...
Langston Posted May 30, 2021 Share Posted May 30, 2021 (edited) I noticed that and thought about doing that myself at one point, but I happen to have a room that has close to perfect corners for my '74 models. A couple of thoughts: 1. I bet there'll be a difference with Z measurements even with the new ones in a corner vs. not, but less so. 2. Corner placement is still best for acoustic reasons when possible in most cases - nothing that hasn't been noted before of course. : ) God bless you and your precious family - Langston Edited June 4, 2021 by Langston Quote Link to comment Share on other sites More sharing options...
Bulkogi Posted June 25, 2021 Share Posted June 25, 2021 If I am reading these correctly, it would seem that the Heresys have a far flatter impedance curve than other models, and never dip below 8 ohms. Is that right? Are the Heresy IIs comparable? Quote Link to comment Share on other sites More sharing options...
Langston Posted July 14, 2021 Share Posted July 14, 2021 On 6/25/2021 at 4:18 PM, Bulkogi said: Are the Heresy IIs comparable? Apparently not. This is a calibrated measurement of a pair of 1986 vintage Heresy II's. They are unmodified and function correctly. God bless you and your precious family - Langston Quote Link to comment Share on other sites More sharing options...
grindstone Posted January 7, 2022 Share Posted January 7, 2022 Just wanted to say thanks to everyone for posting data. Loved the faux wall/no wall and the 18" khorn numbers. Here's a sweep of my 195X 15WK Georgian sitting on concrete with one wall brick and basicaly no-wall on the other side (in-room). Quote Link to comment Share on other sites More sharing options...
M.Att Posted March 8, 2022 Share Posted March 8, 2022 K-80 Using DATS v3, free air readings. Quote Link to comment Share on other sites More sharing options...
M.Att Posted March 17, 2022 Share Posted March 17, 2022 (edited) Klipsch KG4 impedance graph using K80 and MidWest Audio MW-5082 woofers. The crossovers are original. Edited March 17, 2022 by M.Att Quote Link to comment Share on other sites More sharing options...
mboxler Posted June 21, 2022 Share Posted June 21, 2022 . Quote Link to comment Share on other sites More sharing options...
net-david Posted November 10, 2022 Share Posted November 10, 2022 Heresy III, also just the woofer inputs and then just the mid/high inputs. I should probably redo these and keep the axis scaling consistent. Quote Link to comment Share on other sites More sharing options...
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