HDBRbuilder Posted February 15, 2004 Share Posted February 15, 2004 OK, all you Cornwall freaks....I am NOT going into any details at this time, but I have an idea for a Cornwall cabinet redesign that will knock your socks off. Hopefully, I will be able to build these up as a pair of working prototypes this summer...so...those of you who like to argue over whether the vertical-horned Cornwall is best or the horizontal-horned Cornwall is best just keep your eyes peeled! I won't give out any more info at this point because I think this idea may be patentable! Quote Link to comment Share on other sites More sharing options...
garymd Posted February 15, 2004 Share Posted February 15, 2004 Andy, We'll be eagerly awaiting. Maybe you could give us a few more details at Indy this year? Quote Link to comment Share on other sites More sharing options...
HDBRbuilder Posted February 15, 2004 Author Share Posted February 15, 2004 All I will say for now is...In the tradition of those Oak LaScala replacement cabinets I designed, these new re-designs of Cornwalls will also be replacement cabinets, so that one can just drop in components from his/her current Cornwalls...preferably ones with B-style networks. Quote Link to comment Share on other sites More sharing options...
TBrennan Posted February 15, 2004 Share Posted February 15, 2004 If I was hung-up on this horizontal-vertical Cornwall thing I'd mod my CWs by putting the treble horns in a rotateable panel, like with this JBL. Then you would just have to rotate the panel 90 degrees and there you go. Quote Link to comment Share on other sites More sharing options...
Piranha Posted February 15, 2004 Share Posted February 15, 2004 HDBRbuilder, looking forward to hearing more info on your CW plans. TBrennan, that's a great idea. Quote Link to comment Share on other sites More sharing options...
HDBRbuilder Posted February 15, 2004 Author Share Posted February 15, 2004 Only problem with Tom's idea is that the alignment of the horn lenses over each other is different for the vertical and horizontal-horned Corns...for a reason! Quote Link to comment Share on other sites More sharing options...
TBrennan Posted February 15, 2004 Share Posted February 15, 2004 What's the reason, other than visual symmetry on the horizontal arrangement? Quote Link to comment Share on other sites More sharing options...
fini Posted February 15, 2004 Share Posted February 15, 2004 I know! 45-degree horns!! Quote Link to comment Share on other sites More sharing options...
No Disc Posted February 15, 2004 Share Posted February 15, 2004 HDR, Interesting... Is this something you will offer as "plans", "kit", or fully assembled cabinet? Still to early to say? Tim Quote Link to comment Share on other sites More sharing options...
TBrennan Posted February 15, 2004 Share Posted February 15, 2004 Fini----Why not. Given the lack of interest that PWK had in controlled directivity putting the horns at a 45 would probably work as well as any other way. Quote Link to comment Share on other sites More sharing options...
Cut-Throat Posted February 15, 2004 Share Posted February 15, 2004 HDBR, Do you do veneering also? - Thinking Rosewood Did you sell all of those La Scalas that you built? Quote Link to comment Share on other sites More sharing options...
Q-Man Posted February 15, 2004 Share Posted February 15, 2004 Andy, I too may build my idea of a Cornwall. I was playing with the shape of the cabinet and a horn that I like. I was going to load it with my left over drivers and post pictures here to see if anyone wanted to buy them. Quote Link to comment Share on other sites More sharing options...
artto Posted February 15, 2004 Share Posted February 15, 2004 ---------------- On 2/15/2004 6:10:43 PM TBrennan wrote: Given the lack of interest that PWK had in controlled directivity............. ---------------- Excuse Me? PWK had a great deal of interest in controlled directivity! (Sorry Tom, You get a spank! You obviously haven't studied the Klipsch Audio Papers. PWK wrote whole documents & referenced other people's work on this subject published in IEEE & IRE Transactions on Audio). Quote Link to comment Share on other sites More sharing options...
jt1stcav Posted February 15, 2004 Share Posted February 15, 2004 In any event, I'm intriqued by this "new" Cornwall redesign. And seeing how Andy built an awful lot of 'em, then he's very much qualified IMO...not to knock Q-Man's idea, natch. Any new design that benefits the Cornwall's horns, woofer, and crossover, are worthy candidates. I for one can't wait! Quote Link to comment Share on other sites More sharing options...
TBrennan Posted February 15, 2004 Share Posted February 15, 2004 Artto---I'm going by PWK's statements in his interview with Bruce Edgar that was published in Speaker Builder several years ago. Then there's the lack of controlled directivity in the actual speakers he designed. Quote Link to comment Share on other sites More sharing options...
Deang Posted February 15, 2004 Share Posted February 15, 2004 Exponential horns have controlled directivity by their very nature. Heck, I think they're all pretty beamy. Quote Link to comment Share on other sites More sharing options...
TBrennan Posted February 15, 2004 Share Posted February 15, 2004 Dean---Indeed. (Yeah, I know you're kidding on the square) But with exponential horns the beaming gets worse as frequency rises. PWK put this to work as a form of automatic EQ; the collapsing pattern as frequency rises gives a lift to the frequency response on axis, thus making up for the roll-off of the compression driver, at least on axis. The Altec 511 does a similar trick; it maintains directivity in the horizontal plane but allows it to collapse vertically, the result is improved highs on axis. The saladbowl tractrix horns that Bruce Edgar makes lose control of directivity in both planes but Edgar doesn't care. Evidently PWK didn't really care either. He may have figured that corner placement, something he touted for all his speakers, would put the sound where he intended it to go and thus he needn't design horns with controlled directivity. Maybe Artto, whose evidently read PWK's papers, can enlighten us further. Quote Link to comment Share on other sites More sharing options...
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