BEC Posted October 18, 2007 Author Share Posted October 18, 2007 I don't have any drawings for the motorboard. I took the horns and woofer to a cabinet shop and the dimensions were input directly into a CNC router. I did not get a copy of a drawing. Bob Quote Link to comment Share on other sites More sharing options...
colterphoto1 Posted December 8, 2008 Share Posted December 8, 2008 bump for folks interested in CornScala development, credited to Bob Crites with this 'Test box' thread. Quote Link to comment Share on other sites More sharing options...
MechMan Posted December 8, 2008 Share Posted December 8, 2008 Interesting stuff. Any chance of getting the same results, or even making it work, in a C1 cabinet? Quote Link to comment Share on other sites More sharing options...
BEC Posted December 8, 2008 Author Share Posted December 8, 2008 Interesting stuff. Any chance of getting the same results, or even making it work, in a C1 cabinet? That would be in this thread. http://forums.klipsch.com/forums/t/73587.aspx?PageIndex=1 Bob Crites Quote Link to comment Share on other sites More sharing options...
jacksonbart Posted December 8, 2008 Share Posted December 8, 2008 Bob You really must love Folger's coffee or you like to keep cans of night crawlers above the kitchen cabinets. Quote Link to comment Share on other sites More sharing options...
BEC Posted December 8, 2008 Author Share Posted December 8, 2008 Bob You really must love Folger's coffee or you like to keep cans of night crawlers above the kitchen cabinets. Coffee cans make good containers to keep "stuff" in. Bob Quote Link to comment Share on other sites More sharing options...
MechMan Posted December 8, 2008 Share Posted December 8, 2008 Hey Bob. I read your older post and am wondering...Do you supply everything required for the changeover, I am interested in giving this a try. Quote Link to comment Share on other sites More sharing options...
BEC Posted December 8, 2008 Author Share Posted December 8, 2008 Send me an email. Bob Crites bobcrites@mac.com Quote Link to comment Share on other sites More sharing options...
Guest David H Posted December 9, 2008 Share Posted December 9, 2008 bump for folks interested in CornScala development, credited to Bob Crites with this 'Test box' thread. Good call on the bump, this thread has to much good info. Quote Link to comment Share on other sites More sharing options...
CIGARBUM Posted December 9, 2008 Share Posted December 9, 2008 Now that I haave been up half the evering reading all the posts pertaining to the test box. Most of the information I read was way over my head, but I get the indication that if it sounds that good to you, it has to be good without a whole lot of further tinkering. If you would be so kind to answer a few questions, (1) was there any resolution to the padding issue, again you were satified with the carpet padding. (2) what is the dimension of the top cabinet, assumming I will be purchasing your woofer/midrange/tweeter and crossover. (3) If sealed properly can you use screws to attach the back of the bass bin, and if a back is required for the top cabinet, can you use screws? (4) is the internal bracing necessary? I have prices the material: 3/4" Russian made 11 ply birch is $51 for 5x5 sheet, 3/4" MDF is $24 for 4x8 sheet. I know they will be heavy but once placed I'm going to nail them to the floor, and just real careful moving around during construction. Going to use pocket hole for attaching with foaming glue to help seal. If I am assuming wrong, please correct me. Thanks CB Quote Link to comment Share on other sites More sharing options...
tigerwoodKhorns Posted December 9, 2008 Share Posted December 9, 2008 Nail them to the floor? Isn't that a little overkill? I have a question. This was designed to test speakers while they are being rebuilt, so the 400 hz crossover was used to match the K Horn. I'm sure that this has been done, but building a Tractrix horn and crossing over at maybe 600 hz to lighten the load on a 1" driver seems to make sense. I also guess that somebody had already made a 2 way. How high can the bass bin go without falling apart? Quote Link to comment Share on other sites More sharing options...
Guest David H Posted December 9, 2008 Share Posted December 9, 2008 I also guess that somebody had already made a 2 way. How high can the bass bin go without falling apart? Because this is a ported box, the box and port really doesn't dictate top end frequency response like a horn loaded box would. This would depnend on the woofer. Quote Link to comment Share on other sites More sharing options...
BEC Posted December 9, 2008 Author Share Posted December 9, 2008 CB, The padding has not changed since I first put it in only one of the cabinets. I listen to these every day and have actually forgotten which one has the padding. Guess it makes little or no difference. On the "test box" speakers, the top of the motor board just extends up 11 1/4 inches above the bass bin. My cabinets sealed perfectly without any sealing material or gaskets. Just MDF to MDF. These are, though, very precision cut on a CNC router. No bracing in these. But, MDF is very stable and non-resonate. Might be different with plywood. Bob Quote Link to comment Share on other sites More sharing options...
CIGARBUM Posted December 9, 2008 Share Posted December 9, 2008 Overkill, never. As you can see from the attached; Up here in the mountaians of GA this is what we call the REDNECK MODEL of the Cornscala. And if you nail the Cornwall to the LaScale that eliminates a lot of them unwanted sound waves or vibrations that you guys talk about. Quote Link to comment Share on other sites More sharing options...
tigerwoodKhorns Posted December 9, 2008 Share Posted December 9, 2008 Cigarbum, That's....uh, that's a, um...those are sure...wait, how many, oh....uh....nice! He, it looks like you got a TT. What did you wind up getting? Quote Link to comment Share on other sites More sharing options...
Deang Posted December 9, 2008 Share Posted December 9, 2008 Hi Bob -- out of the three email addresses I have for you now, which of the three do you prefer folks to use? I have something interesting I want to show you. Quote Link to comment Share on other sites More sharing options...
BEC Posted December 9, 2008 Author Share Posted December 9, 2008 Dean, bobcrites@mac.com Bob Quote Link to comment Share on other sites More sharing options...
USNRET Posted December 9, 2008 Share Posted December 9, 2008 Overkill, never. As you can see from the attached; Up here in the mountaians of GA this is what we call the REDNECK MODEL of the Cornscala. And if you nail the Cornwall to the LaScale that eliminates a lot of them unwanted sound waves or vibrations that you guys talk about. BOB, I see it's time for an intervention. Warm up the cigars, chill the booze and start up the dancing girls. I'll be up in the next couple of weeks. Quote Link to comment Share on other sites More sharing options...
colterphoto1 Posted December 10, 2008 Share Posted December 10, 2008 when nailing them to the floor, make sure to use stainless steel nails, else'n Bob'll GITcha Bob and Michael drink a shite-ton of coffee Any thoughts to possible issues caused by using a cubic container for the bass on the original version? There are still two 24" dimensions in the final versions are there not? Quote Link to comment Share on other sites More sharing options...
ClaudeJ1 Posted December 10, 2008 Share Posted December 10, 2008 "Dick Moore, a former employee, examined the Theil Equations (became available about 1975) and told me I had missed the optimum design by about 3%."That wouldn't be too bad considering the Cornwall was conceived way before the days of Theil/Small, would it? Back in 1985, my wife and I spent a day with PWK (what a gentleman he was). We were in the library with he and Jim Hunter. You should have seen the huge grin on PWK's face when I mentioned that he had done a 4th order electrical filter analogy of the Cornwall's bass reflex design in 1958 (It's in the Klipsch papers),fully 3 years before Thiele did it. The look on his face told me that I was probably the first person to notice that and tell him about it in person. It tookd about 13-17 years before the AES published Thiele's bass reflex alignment charts, so PWK was really the first to do this, not Thiele. The Cornwall is very close to a Thiele QB3 alignment Quasi-Butterworth 3rd order design..........the one with lowest distortion. Quote Link to comment Share on other sites More sharing options...
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