sunnysal Posted July 3, 2000 Share Posted July 3, 2000 very interesting klew' it would seem that the reason all the peaks disappeared during your partial loosening of the clamp was because the clamp then acted to dampen the resonance rather than stiffened the cabinet as it did when fully tightened (which apparently moved the resonant frequency up...makes sense)...this leads me to believe that the idea of some surface mounted dampening may be quite effective...the dynamat and metal, or something like that... Quote Link to comment Share on other sites More sharing options...
J M O N Posted July 3, 2000 Share Posted July 3, 2000 Klew, What was the interface between the clamp and the speaker? Maybe you can try using a piece of rubber (or something like that), that would dampen any of the vibrations going from the speaker back up to the clamp and prevent the clamp itself from vibrating. Just a thought I had... Quote Link to comment Share on other sites More sharing options...
Klewless Posted July 3, 2000 Share Posted July 3, 2000 JMON, I had thin cardboard between the clamp and speaker. I thought of sponge but couldn't find any at the moment. How's that for lazy? ------------------ John P St Paul, MN Quote Link to comment Share on other sites More sharing options...
AndyKil Posted July 4, 2000 Share Posted July 4, 2000 Here is a link to a photo of what looks to be a cross-braced La Scala: http://www.hps4000.com/pages/525_.html Quote Link to comment Share on other sites More sharing options...
J M O N Posted July 5, 2000 Share Posted July 5, 2000 Klew, Can you try using a piece of rubber that is at least 1/4"-1/2" thick or so? I wouldn't think cardboard or a sponge would offer much dampening. Quote Link to comment Share on other sites More sharing options...
jwgorman Posted July 7, 2000 Share Posted July 7, 2000 So Klipsch Inc, starts this board for the "convenience" of its customers. Yeah right! R&D for free says I. Evil corporate types. Picking your brains for all the engineering leg work. Bob G just plays us like a stratavarios and enters all the data into a room size main frame. All the while dropping you guys just enough info to spur you on. I bet he laughs a lot like Dr. Evil. Probably has a 1/8 scale replica of himself too. And a hairless cat... Evil, evil, evil jwgorman Quote Link to comment Share on other sites More sharing options...
sunnysal Posted July 7, 2000 Share Posted July 7, 2000 hey JW don't pick on BobG! if I am serving as his R&D department Klipsch is in serious trouble...now if he wants to know something about running a telecomunications company.... Quote Link to comment Share on other sites More sharing options...
JohnA Posted July 8, 2000 Share Posted July 8, 2000 Well, we all bloody well know what THIS is! It is also EXCATLY what I had in mind for mine. Maybe it's not so ugly after all. John Quote Link to comment Share on other sites More sharing options...
WMcD Posted July 8, 2000 Share Posted July 8, 2000 John P, Gee that was some very nice investigatory work. Thanks for taking the time to do the work and post the results. If I may offer a thought. The geometry of panel resonances are a bit beyond me right now. But, basically, on the side wall there are three secured sides (back, top, and bottom) and a non secured front side. It may be that you placed the end of the clamp at the midpoint of the front of the side panel. That would create a node at the center of the front edge of the panel. Of course, the whole thing is better damped, which is probably what you saw. However, it would create some symetry between the upper half and the bottom half. Therefore, there are now two identical systems which peak at their own characterist frequency, thus reinforcing each other's output. A "fix" would be to place the clamp a bit off set from the center, perhaps at the three fifths position toward the bottom or top. Now you have a different, and perhaps better, distribution of the resonances. There is most of the damping, but not so much overlapping. It is something to experiment with, and doesn't cost anything. If you try it, let us know. Thanks again for the scientific info. Regards, Gil 1 Quote Link to comment Share on other sites More sharing options...
dtximages Posted July 10, 2000 Author Share Posted July 10, 2000 Hey John whats up with HPS taking all of Klipsches designs. Did they buy rights to design or does klipsch supply them? Is HPS a Klipsch company? Quote Link to comment Share on other sites More sharing options...
JohnA Posted July 11, 2000 Share Posted July 11, 2000 I don't know anything about HPS. Since they changed the design, and the La Scala patent has long expired, I'm sure it's O.K. Since the site said the speaker was made for HPS, I think that's a clue. Les brags on his La Scalas with the K-43 woofer having more bass, a 106 dB rating may well be possible. John Quote Link to comment Share on other sites More sharing options...
JohnA Posted July 11, 2000 Share Posted July 11, 2000 Check these pics. The first is dated 1983 on the HPS4000 site. This one is the Klipsch pro Jubilee. Something is fishy in Boston! John Quote Link to comment Share on other sites More sharing options...
gmcleod Posted July 30, 2000 Share Posted July 30, 2000 John F. Allen the founder of HPS4000 stated in both the forums on the Movie Sound Page and Film-tech.com that the Klipsh products were not up to his specifications of workmanship and has them built for him elsewhere check out http://www.moviesoundpage.com/cgi-bin/ubb/Ultimate.cgi?action=intro in the cinema forum on HPS and on http://www.film-tech.com forums under who has heard a hps4000 system Quote Link to comment Share on other sites More sharing options...
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