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I bought my first Mac equipment in 1968 as a college student, with a bank loan. Banker thought I was crazy but I paid my bills ( I put myself through college as a bill collector). I still own and use that equipment almost daily, along with other Mac bought over the years. The only ONLY repair was a glass face plate broken in moving from Dallas to Atlanta in 1985. It was the movers (1st class corporate move) fault and they paid without questuon. Yes, I had to wait 4-5 months to get the glass, BUT I GOT THE GLASS for that C26 and I can get it again if I need it. The "MAGIC" of McIntosh: They fix what they sold 40+ years ago. The number of companies that still do that are a VERY short list which meets that type of criteria. The only one that comes to mind is Rolex watches (31 years) and that has been more necessary than for my Mac equipment. I too own a MX-130 and would ONLY part with it, if I can find a cherry C-39. In my experience, three words express service or any project you have to complete: "Fast" "Good" "Cheap" Of those three simple concepts / words, when you (and/or your boss) learn to ACCEPT, that you ONLY get to choose two of the three words, life becomes much less stressful and you undersand economics and reality. Example: you can have "Fast" and "Good", but it will not be "Cheap"! Rant / Lesson (you choice) over. Mike

I too own a Teac A-L700P. I've had it for about 2 1/2 years and bought it new off of Amazon. I am very pleased with the sound. It is used with a McIntoch MX130 Preamp and a MC-2505 for the rear speakers. All five speakers are Cornwalls. All of that said. I've been looking, with little success, for better built and higher power Tripath technology amplifers. Any suggestions?? Mike

There is a pair of Vertical Cornwalls on eBay that you might not see because the seller spelt Cornwall as "Conrwall". It is item # 170174957668 They do not have the original K-33's at least in the one interior shown, but they can be an opportunity for someone. Off topic comment: I do not like the way the Copy and Paste function now operates. Mike

Well on the positive side, Ken appears to have learned how to use the search function! Mike

What is the serial number on your Mahogany Cornwall. Any pictures of the front, top, etc.? Mike

Thanks! I understand the explaination and accept it. Bob, You are correct. They do have "B" crossovers in them. Sometimes, when in a hurry and tired the brain is not always engaged. I didn't have to look, I knew that! Summary: One less project. Mike

Why? They have B2 crossovers in them now. I'm willing to change (have custom built) crossovers, but want improvement in bass depth for my trouble.

Is the Altec Lansing 416-8A Alnico 15" a Good / Great replacement for the K-33? To be used in 1974 Cornwalls with original B2 crossovers. Mike

dupe

Yes and the amplifier is called Gasoline

Hey Mate, Now that you've perfected your picture uploading skills, might I suggest we next work on you advertising skills. Few are going to be drawn to the bottom of this tread to see your ultimate desire, which is to find this diaphram. So I would recommend starting a new thread with a title something like " Help need find a diaphram for ______, picture attached" Filling in the blank with what the diaphram is from would very helpful to those trying to help you. Best of Luck, Mike

Look for the serial number stamped into the edge of the plywood above the label (if the label is unreadable) If it contains a letter "A" through "L" it is for sure a Vertical Conwall II. The change over from vertical to horizontal took place in 1974 (the "M") year so the the "M" could be either. The verticals are more desirable because they sound better IMHO! If the drivers are original they will have Klipsch logos on them. The K-77 tweeter is a round ALNICO. The K-55V squaker is a round ALNICO. The K-33 woofer is a square "mud" magnet. Should the serial number contain either the letters be A, B, C and maybe D and the woofer is round do not leave there without them!! If you don't want them I will come and get them from you!! Based on the example you pointed to, the "lattice" covers are probable caine. Best of luck, keep us informed and 600 would be a steal price for Verticals

I missed it in his reply. My only excuse is, he used a small font, because I'm guilty of what irrates me in too many posts: the members failure to read. But, Bob provided another good tip! Many Thanks, Mike

Meagain is now asking the same question I posed earlier. What is the acceptable range for a soldered K-55V? Mike

Thanks, Bob Any ideas on what the acceptable range is? Mike

I have 2 solder connecter K-55's that read 10.9 to 11.0 ohms. Is this correct, OK, Good??? Thanks

don't bother Can you expand on your answer??

revjac, Sorry it took me so long to get back. IMHO bracing the back will do way more to improve the bass than it will do to improve the higher frequencies. My main idea is simular to DrWho's 2 x 4 comment. First I would use the original backs as a pattern to make new backs to use and preserve the originals for the future. Then use 4 pieces of either Ash or Hard Rock Maple 1" x 2" in a Tic-Tac-Toe pattern, with the 1" edge planed flat by a mill machine. The milled surface would be the surface next to the speaker back. Where the pieces overlap cut a 1" wide groove in each. A screw and glue would be used at each intersection. This "matrix" would then be screwed and glued to the exterior back. New damping material added to the interior side. And this does begin to approach "bridge making". The secondary idea was to epoxy 1/8" steel plates to the new backs. Different materials with different thicknesses DrWho, Did I understand your comment to mean: a stock Cornwall's interior volume is slightly too small. I have believed that for some time based on a comment Paul Klipsch made years ago which implied the same, but he didn't just come out and say it. I'm not enough of an engineer to figure it out for sure. Do you have proof and by how much? Mike

What you have stated above is the way you want to go. Applied to the exterior. You do not want to change the interior volume any more than you have already with the brace you applied to the motorboard. I have other ideas, but not the time tonite. Welcome, Mike

Duplicate???

If you look close the top and sides are TWO layers of 3/4" plywood? Not a bad thing, but heavy!

If he dies, he dies. []

Thanks for the replies!! I'm thinking about building a version of the CornScala on the cheap and there are some LaScala Pro housings for the tweeter and mid on eBay. My next question would be: How wide and long is the K-401 (without the driver attached)? Mike

proko03 Congratulations on the score!! Would you share some pictures (interior, exterior)? What are the serial numbers? Inquiring minds want to know. You really don't "own" Vertical Cornwall's you just take care of and enjoy them until the next fortunate caretaker comes along and pays you for the privilege. Mike