quadklipsh Posted April 9, 2011 Share Posted April 9, 2011 compared to some other brands like the paradigms and b&ws , the klipsch cabinets have been a lot less impressive !!!! the others being heavier and better toned ,they definitely look and feel better . perhaps if we swap the drivers from klipsch to a paradigm studio 100s and vice versa ,and play them (provided the crossover settings are optimized out first) , it would be fun to note the difference ... the liveliness of klipsch may also have something to do with the shallow thudd of its cabinets . it may sound lifeless in those other cabinets that are better damped or neutral sounding . anyways klipsch rocks in its cabinets ,nonetheless. Quote Link to comment Share on other sites More sharing options...
JJkizak Posted April 9, 2011 Share Posted April 9, 2011 The K-horn I don't wonder but the Cornwall could use a stiffer backboard. JJK Quote Link to comment Share on other sites More sharing options...
Guest " " Posted April 9, 2011 Share Posted April 9, 2011 I think I did an analysis of the cabinet designs of the Heritage models. The results showed that the size of the cabs had little to do with optimizing the drivers. You could make a pair Heresys out of 1 sheet of plywood, a pair of cornwalls out of 2, a a pair of LaScala's out of 2, etc. It seems that the cabinet sizes were more about the largest size that would result in less scrap wood. If we were going for acoustics', the internal chamber volume of the Belle, Khorn, and Lascala benifet by more volume. The max volume change I have experience with is 15% increase in the khorn. There are w-bins out there that are basically LaScala's 10% more in size. Quote Link to comment Share on other sites More sharing options...
Moderators dtel Posted April 9, 2011 Moderators Share Posted April 9, 2011 Here you go Quadklipsch, I know you like reading and looking here. This is a pair of Cornwall lll's, Walnut is the wood, built by hand in Hope AR a few years ago. The corners and all edges are perfect, great workmanship. http://www.cyclonecj.com/dtel/Dtelcorns-small/index.html Quote Link to comment Share on other sites More sharing options...
Guest " " Posted April 10, 2011 Share Posted April 10, 2011 now thats a good idea....2X4's from front to back Quote Link to comment Share on other sites More sharing options...
thebes Posted April 10, 2011 Share Posted April 10, 2011 The K-horn I don't wonder but the Cornwall could use a stiffer backboard. JJK Could you expand upon that further JJ. I own a pair and wouldn't be adverse to repalcing the back if it would make a credible improvement, not just change the sound.Oh, and wouldn't those 2 by 4's change the sound. Quote Link to comment Share on other sites More sharing options...
Moderators dtel Posted April 10, 2011 Moderators Share Posted April 10, 2011 The K-horn I don't wonder but the Cornwall could use a stiffer backboard. JJK Could you expand upon that further JJ. I own a pair and wouldn't be adverse to replacing the back if it would make a credible improvement, not just change the sound. Oh, and wouldn't those 2 by 4's change the sound. I don't think a different back or the 2x4's would make a difference. I say/guess that because it's a very small size in internal volume change and with ports the size of those on Cornwalls there is really no pressurizing of the cabinet with as little as the driver moves. I could be totaly wrong ? Quote Link to comment Share on other sites More sharing options...
JJkizak Posted April 10, 2011 Share Posted April 10, 2011 The backboard is 3/4" and will vibrate when you get up around 98 db spl. I haven't changed mine because if you went to 1" it would not be flush with the cabinet. because the board sits and screws on glued runners on the sides and the top and bottom the edges of those boards. As far as the vibration affecting the sound? I don't know. I would not use anything that would change the volume of the cabinet. JJK Quote Link to comment Share on other sites More sharing options...
thebes Posted April 10, 2011 Share Posted April 10, 2011 That makes sense Dtel, given the rather large porting, any effects would have to be minor indeed. JJ, did not know that. Given the small size of my room 98spl is not something I'd get up to very often, so in my case, it doesn't seem to be a factor. Quote Link to comment Share on other sites More sharing options...
Moderators dtel Posted April 10, 2011 Moderators Share Posted April 10, 2011 Do the older models have the 2x4 braces in them, I don't know, if they don't it would be easy to add them, just glue would hold to cut down on vibrations i would guess. Quote Link to comment Share on other sites More sharing options...
djk Posted April 10, 2011 Share Posted April 10, 2011 The Cornwall II has a 2x4 brace, the original does not. On an original it is a simple matter to glue a 1x3 on edge diagonally across the back, make sure you miss the mid driver. Quote Link to comment Share on other sites More sharing options...
JJkizak Posted April 11, 2011 Share Posted April 11, 2011 Never thought of that and Klipsch reccommends that the Cornwall be 6" from the wall (I think but not sure) so there is plenty of clearance. JJK Quote Link to comment Share on other sites More sharing options...
fini Posted April 11, 2011 Share Posted April 11, 2011 The backboard is 3/4" and will vibrate when you get up around 98 db spl. I haven't changed mine because if you went to 1" it would not be flush with the cabinet. because the board sits and screws on glued runners on the sides and the top and bottom the edges of those boards. You could glue and screw a 1/4" or 1/2" panel to the inside of the back panel, leaving it just short of the glue blocks. I'm not sure of the clearance (i.e. the mid driver as Dennis mentioned), but that could easily be accommodated with a hole saw. Only downside is a resulting reduction in cabinet volume. Someone smarter than I could calculate how to compensate for that, though. Quote Link to comment Share on other sites More sharing options...
JJkizak Posted April 11, 2011 Share Posted April 11, 2011 I still like the vertical brace or braces glued edge wise on the back and screwed if you remove the back. Maybe 2" x 3/4" x ( long?) with fancy curves cut into them to make them look pretty. Then no worrys about the inside volume. JJK Quote Link to comment Share on other sites More sharing options...
Marvel Posted April 11, 2011 Share Posted April 11, 2011 I still like the vertical brace or braces glued edge wise on the back and screwed if you remove the back. Maybe 2" x 3/4" x ( long?) with fancy curves cut into them to make them look pretty. Then no worrys about the inside volume. JJK I believe Dennis meant to put a diagonal brace on the inside, but piece like that is not going to change the volume enough to hurt anything.Bruce Quote Link to comment Share on other sites More sharing options...
motorcitym3 Posted April 18, 2011 Share Posted April 18, 2011 I added internal bracing on my KLF-30's cabinets yesteraday and noticed a nice improvement. Quote Link to comment Share on other sites More sharing options...
juniper8 Posted April 18, 2011 Share Posted April 18, 2011 I added internal bracing on my KLF-30's cabinets yesteraday and noticed a nice improvement. Motorcity, that looks like a great idea, but if you used silicone caulk you may want to let it dry a few days. When silicone gasses it can break down adhesives. Good luck! Quote Link to comment Share on other sites More sharing options...
SWL Posted April 18, 2011 Share Posted April 18, 2011 I added internal bracing on my KLF-30's cabinets yesteraday and noticed a nice improvement. You noticed an improvement in what? Didn't they already have bracing in them? Quote Link to comment Share on other sites More sharing options...
motorcitym3 Posted April 18, 2011 Share Posted April 18, 2011 To me the bass seemed a bit loose, somewhat boomy before the bracing. Now it is tighter/punchier but that could be the polyfill. The original cabinets did NOT have any internal bracing. I used 1/2" quarter round for all 12 inside corners and 2.5" x 3/4" braces in the 3 areas shown. It is fun project nontheless. I also had DeanG redo the cross overs and added dynamat to the horns that seemed to tame the highs and open up the sound stage. Quote Link to comment Share on other sites More sharing options...
russ69 Posted April 18, 2011 Share Posted April 18, 2011 If it hasn't been said already, the cabinet is an integral part of the design. If a designer was paying attention he/she would use the resonances to his advantage, if at all possible. I know of some designs that do just that. Quote Link to comment Share on other sites More sharing options...
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