Dave A

I tune mine with mostly Cello music ;D

The carbide tipped blade teeth are the secret to cutting metal. I have cut a lot of 1/2" aluminum plate with a skill saw and carbide blade and the hot little chips can be exciting but the cut happens fast and as accurate as you are. You are cutting thin material subject to snaging and bending so feed carefully and slowly. Arbor hole size should not be a problem just match what you have and the blade you need will be out there. More teeth with smaller gullets is better and will cost more. Fewer teeth is cheaper and will up the chance of snagging your material. A dab of transmission fluid on your cut area will help things feed better also.

As the title says what exactly is the difference. Is it the diaphragm only or are there other differences?

OK I have an, I hope, final conclusion on this problem. In desperation since none of the variations I have tried really made me happy I stuck a set of KP-450 HF crossovers on a pair of DE-75 drivers and both the 510 EBay horn and the 18 x 10 EBay horn. I used the KPT-456/KP-450 LF bin crossover for the 904 bass bin. OH man just like the KPt-456's and that wonderful musical sound is back. I am concluding the new Klipsch crossovers are purely for behind screen cinemas and the older 450 456 crossovers were for direct unhidden sound production. I intend to build some KPT-456 crossovers soon and I expect good things.

Never. It is amazing what those little boxes kick out.

Reassessing my opinion on these 510's. I still think the 18 x 10 EBay horn is better but have decided that the Klipsch OEM crossover is not salvageable and was the main culprit for bad sound. Set up a pair using the same type of crossovers I had on hand for some KP-450's and that wonderful musical sound I like so much was back. I am concluding that the KP-450 and KPT-456 were designed primarily for house sound and to sound good out in the open. The newer 904 whatevers are made to sound good behind a screen and in a theater environment and not in the open.

I am really grateful to get these. Long time on the hunt.

Unloaded today and now the fun begins. Finally got some 402's for those luscious 415 LF4 bins and 904 LF bins and deciding which ones to pair these with.

Even then there are problems. For a while usb ports were being super glued to prevent use. Where my brother used to work they had to get permission to even move the PC on their desk. Doing so without permission was a fireable offense.

This is a story told to me by someone who knows. When we went into Irag the first time people were amazed at how quickly the Iragi air force was ruined. It was supposed to be much more formidable. The Iraqi air and radar control computers were bought from France who got the computers with a back door built in from the USA. When it was time their airforce stood no chance while fighting both better aircraft and being blind in many ways. I buy Dell computers and a few years back read a story for various Dell server boards made in China. They had back doors in them. This is not new and who knows what all is in there waiting to be triggered. I bet the hair would stand up on our necks if we knew the full extent of espionage and surveillance going on. My PC's with design and machining data do not ever go online.

You stick with the existing design there are things you can do that are reversable or won't alter the cabinet in ways that kill future sale of them if you are reworking an existing set of CW's. I think the vast majority of Klipsch owners move to other Klipsch over time and so resale probably is an important thing to consider in that case. Recapping the crossovers and front to back bracing would be #1 in my book and then I would have a listen. #2 would be tweeter replacement and #3 if those did not make me happy I would move on down the road to a Chorus type or a complete new build. Of course this is personal opinion based on numerous speakers that have gone through my hands. Others will make different choices due to personal preferences. It is darned hard to find a simple single recognized as best answer to what you want to do and the variations never end. Decide what your goal is first. A pair of really nice sounding CW's with those limitations or a complete new build and live with those limitations + the risk of experimenting. The very best set of speakers I have is from experimenting so if you are willing to gamble the payoff can be huge. I also have a growing speaker graveyard on the ridgetop for things that did not work so well and old speaker cabinets from Klipsch not worth rebuilding. I am lucky in central Tennessee I can drive to Nashville and get 25mm 4' x 8' BB for $77 a sheet. It is a lot more for that in other places if even available. I doubt port shape is critical but port volume in total opening surface area and length is. Now if the port is one of your main questions ask that specifically here and you will get answers from people who can tell you.

Fight plywood warp with Baltic Birch which is superior to regular plywood in every way. The advice you have been getting regarding driver placement. Is it from someone who has actually built that way and liked the results? You have a TON of variables in there and you have to decide what your goal is. A Cornwall, a re-engineered Cornwall or something entirely different. The DIY forum http://www.hificircuit.com/community/forums/diy-speakers-and-subwoofers.13/ is dedicated to what you seek to do. Now there are plenty of builders here too but you have a really big laundry list of questions. I think I would start asking around to find examples of what you want to do and go listen first.

Chicken.

The DE120 driver is better than the Tonsil one so the CT120 is better. bchristmas is the guy I mentioned to you who has the LMAHL on top of his cabinet since the motorboard is cut out for Bob's tweeter. You might PM him and ask him what he did.

Actually the Eastern Diamond Back Rattler can be up to 15 feet long. We saw one years ago in the San Diego Snake section that was as big around as my leg. Eastern Diamondback Rattlesnake

Pile of A7 stuff back up for sale. Buyer had some problems so here they are again. I will get a list of parts here later today. I appreciate the kind offer and if I need to get exact with these i will contact you. I am selling the pile for $750 so I am not going to spend a lot of time getting every detail. I can sell the horns alone on Ebay for almost this and throw the rest of the stuff out and not be bothered with it all. I might just keep it and finish the project too.

No it is not always like this. ODS123 gets going and tells everyone what to think and does so with self anointed assurance that he is right in all things all the time even though much of what he talks about he has never listened too. He is a natural magnet for less than positive comments as a result..

True but I have other snakes that do that and they will not put me in the hospital. Cat works pretty darned well too as far as that goes.

I think Coytee should get an alligator head alarm clock. The eyes can be the hours and minutes and when the alarm goes off the jaws open up. Push the jaws half way down for snooze button and all the way down for alarm off.

I see the word "RARE" in the listing I only go there to be amused.

I have not forgotten you I am just buried under other projects more important. Hope to get back to these in a few weeks.

I figure it is like rattlers and copperheads around here. If I see one on my land it goes away.

There was a big alligator farm we went to in Alabama. The guy answering questions stated that alligators had been detected as far north as Cincinnatti in the Ohio River. Quite rare but they had been seen. They are moving north.

SMAHL V2's

Out of the 100 plus sets of Klipsch I have bought and sold and fixed up the Cornwalls were the only ones I passed up because of the resonance problem. Twice I bought those and never again.They sounded like big boomy boxes to me and the complete lack of that irritating coloration on the CW4 was astounding.