JoergGerbracht Posted July 5, 2007 Share Posted July 5, 2007 Hi, is it correct that there is no insulation in a Heresy I by default? Thanks for your help Joerg Quote Link to comment Share on other sites More sharing options...
ricktate Posted July 5, 2007 Share Posted July 5, 2007 Not any in the Hersey line unless they started in the Heresy III.Rick Quote Link to comment Share on other sites More sharing options...
JoergGerbracht Posted July 5, 2007 Author Share Posted July 5, 2007 Not any in the Hersey line unless they started in the Heresy III.Rick Sorry for my english, I don't understand that[:$] Joerg Quote Link to comment Share on other sites More sharing options...
Daddy Dee Posted July 5, 2007 Share Posted July 5, 2007 joerg You are correct. There is no insulation in the Heresy I. In the Heresy II there is a sheet of flexible foam rubber, about 3/4 inch thick the depth of the cabinet. It sort of lays on top of the woofer basket with the ends extending down to the bottom (floor) of the cab. I don't know what is in the HIII. But I would be most interested to know. Quote Link to comment Share on other sites More sharing options...
JoergGerbracht Posted July 5, 2007 Author Share Posted July 5, 2007 Ok, thanks a lot Joerg Quote Link to comment Share on other sites More sharing options...
scott0527 Posted July 6, 2007 Share Posted July 6, 2007 joerg You are correct. There is no insulation in the Heresy I. In the Heresy II there is a sheet of flexible foam rubber, about 3/4 inch thick the depth of the cabinet. It sort of lays on top of the woofer basket with the ends extending down to the bottom (floor) of the cab. I don't know what is in the HIII. But I would be most interested to know. Daddy, In the II's I bought from Klipsch in 2004, I recall the foam to be laid in the cabinet floor, with the ends extending up? So the foam sheet was in the shape of a "U". I posted some pics a long time ago, they might still be in this forum somewhere. I could be wrong! Quote Link to comment Share on other sites More sharing options...
scott0527 Posted July 6, 2007 Share Posted July 6, 2007 Kudos to the Search function. Found my old thread complete with photos. Shows how the foam was installed in my 2005 Heresy II's http://forums.klipsch.com/forums/thread/563971.aspx Quote Link to comment Share on other sites More sharing options...
Groomlakearea51 Posted July 6, 2007 Share Posted July 6, 2007 Correct; by default there was no insulation, foam, or acoustic treatment in the Heresy-I's, It first appeared in the Heresy-II's with a 1/2" thick x 12" wide piece of foam rubber that was in an inverted "U" shape over the woofer. There are some who have put acoustic foam or baffling in the Heresy-I's cabinets, but it's not clear if there really is a detectable improvement. The greatest "improvement" for the Heresy-I is to make sure the cabinet is properly sealed. To do that is simple, remove the back and put a strip of foam speaker gasket strip around the braces to allow the rear panel to seal correctly. The difference is noticeable; improved bass response. Quote Link to comment Share on other sites More sharing options...
ClaudeJ1 Posted July 6, 2007 Share Posted July 6, 2007 Correct; by default there was no insulation, foam, or acoustic treatment in the Heresy-I's, It first appeared in the Heresy-II's with a 1/2" thick x 12" wide piece of foam rubber that was in an inverted "U" shape over the woofer. There are some who have put acoustic foam or baffling in the Heresy-I's cabinets, but it's not clear if there really is a detectable improvement. The greatest "improvement" for the Heresy-I is to make sure the cabinet is properly sealed. To do that is simple, remove the back and put a strip of foam speaker gasket strip around the braces to allow the rear panel to seal correctly. The difference is noticeable; improved bass response. I asked PWK back in 1985 why the Heresy had no insulation. His anwswer was "I wanted a pure capacitance in the box." He then started doing some high level math and lost me. Jim Hunter designed the new woofer and tweeter in the Heresy II, and possibly the rubber thing, as I recall, but I could be wrong. Claude Quote Link to comment Share on other sites More sharing options...
DrWho Posted July 7, 2007 Share Posted July 7, 2007 lol, that's hilarious Claude! The particular alignment of the Heresy cabinet maximizes its bass performance. Adding insulation changes this alignment and ultimately results in less bass. I don't think there is enough insulation in the Heresy II to affect bass performance (though it is also a different woofer) - instead I'm led to believe that it's main purpose was to reduce standing waves that cause high frequency ringing inside the cabinet. I would expect that the Heresy III has some amount of insulation to do the same. Quote Link to comment Share on other sites More sharing options...
colterphoto1 Posted July 7, 2007 Share Posted July 7, 2007 lol, that's hilarious Claude!The particular alignment of the Heresy cabinet maximizes its bass performance. Adding insulation changes this alignment and ultimately results in less bass. I don't think there is enough insulation in the Heresy II to affect bass performance (though it is also a different woofer) - instead I'm led to believe that it's main purpose was to reduce standing waves that cause high frequency ringing inside the cabinet. I would expect that the Heresy III has some amount of insulation to do the same. exactly Doc. Later models and KP models all have 1-2 pieces of that 1" medium density open cell foam looped around the woofer or on end/side. I've been doing the same to any cabinet I open. Good to reduce standing waves at least. Stuffing the box with insulation or poly-fill does change the tuning. Quote Link to comment Share on other sites More sharing options...
Groomlakearea51 Posted July 7, 2007 Share Posted July 7, 2007 Colter's right; I experimented around with the foam piece on some H-I's, but somehow did not seem to work. Like I said, PWK intended the H-I to be an acoustic suspension speaker. that implies that the enclosure needs to be "sealed". The H-II drivers and crossover are different, thus the foam piece works (or seems to 'cause my ears are probably shot and I can't listen to music with enough volume to tell anymore...) Quote Link to comment Share on other sites More sharing options...
pmsummer Posted July 9, 2007 Share Posted July 9, 2007 The Heresy Industrial Ported (a variation of the Heresy I, with a Helmholtz Resonator slot like a Cornwall) has fiberglass insulation in it. Quote Link to comment Share on other sites More sharing options...
DrWho Posted July 9, 2007 Share Posted July 9, 2007 The Heresy Industrial Ported (a variation of the Heresy I, with a Helmholtz Resonator slot like a Cornwall) has fiberglass insulation in it.Different alignment []In the ported situation, the cabinet is undersized and adding insulation helps the cabinet appear larger. The biggest advantage to a larger cabinet is that it makes the port more effective. It's interesting to note that the ported Heresy actually doesn't dig deeper than the normal sealed enclosure. Instead, bandwidth is being sacrificed to achieve increased sensitivity - allowing the speaker to play louder. The reduced cone-excursion over the passband also reduces distortion (as long as you don't have heavy material below the speaker's tuning point). Quote Link to comment Share on other sites More sharing options...
pmsummer Posted July 9, 2007 Share Posted July 9, 2007 The Heresy Industrial Ported (a variation of the Heresy I, with a Helmholtz Resonator slot like a Cornwall) has fiberglass insulation in it. Different alignment [] In the ported situation, the cabinet is undersized and adding insulation helps the cabinet appear larger. The biggest advantage to a larger cabinet is that it makes the port more effective. It's interesting to note that the ported Heresy actually doesn't dig deeper than the normal sealed enclosure. Instead, bandwidth is being sacrificed to achieve increased sensitivity - allowing the speaker to play louder. The reduced cone-excursion over the passband also reduces distortion (as long as you don't have heavy material below the speaker's tuning point). Mike, have ever seen these? As opposed to the K-350 (?). Quote Link to comment Share on other sites More sharing options...
DrWho Posted July 9, 2007 Share Posted July 9, 2007 Those would be the HIP, as opposed to the K-250 or the K201. Somewhere around here I've got side by side ground plane measurements that were taken at Colter's place. Yes, he owns at least one pair of each style of Heresy! [] Quote Link to comment Share on other sites More sharing options...
DrWho Posted July 9, 2007 Share Posted July 9, 2007 I decided to make a new thread: http://forums.klipsch.com/forums/thread/937400.aspx We've got HIP vs HWL vs KP-250 vs KP-201 Quote Link to comment Share on other sites More sharing options...
colterphoto1 Posted July 12, 2007 Share Posted July 12, 2007 The Heresy Industrial Ported (a variation of the Heresy I, with a Helmholtz Resonator slot like a Cornwall) has fiberglass insulation in it. Different alignment [] In the ported situation, the cabinet is undersized and adding insulation helps the cabinet appear larger. The biggest advantage to a larger cabinet is that it makes the port more effective. It's interesting to note that the ported Heresy actually doesn't dig deeper than the normal sealed enclosure. Instead, bandwidth is being sacrificed to achieve increased sensitivity - allowing the speaker to play louder. The reduced cone-excursion over the passband also reduces distortion (as long as you don't have heavy material below the speaker's tuning point). Mike, have ever seen these? As opposed to the K-350 (?). That be a HIP with different cabinet finish. Looks like it was painted black first, then given white (poster girl) finish later in life? This is what I was attempting when I butchered up a pair of H700's that I got from Doc. I ripped off the grille lip, routed the edges, then proceeded to wrap with fibreglass and just made a mess. I might finish them one day. Quote Link to comment Share on other sites More sharing options...
colterphoto1 Posted July 12, 2007 Share Posted July 12, 2007 My HIP have no insultion whatsoever. KP201 and KP250 supplied with large 'loop' of 1" foam surrounding the woofer. I still put 1-2 slabs in every cabinet to kill internal resonances. Doesn't change the tuning one bit. Quote Link to comment Share on other sites More sharing options...
colterphoto1 Posted July 12, 2007 Share Posted July 12, 2007 Doc sez: "Instead, bandwidth is being sacrificed to achieve increased sensitivity - allowing the speaker to play louder. " YES, like the Doc's quote 'It's all about compromise'. Quote Link to comment Share on other sites More sharing options...
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