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Building a " Belle " ?


Dale W

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How are yours coming along Tom?

Ironically you've bumped the thread after I've tried for several days to post the finalized drawings but... the forums "attach" function has been timing out (after about 5min without a response).

I've divided the drawings into three pages... and created a jpg from my AutoCAD file. I'm going to try again posting them on Monday... during the day.

Later...

Rob

PS: OT, but I "may" be getting a pair of "D" Khorns... so I try and do some additional technical drawings on the "Adding a B spacer" thread. Anyone have the exact dimensions of the side grills and their cutouts?

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On 10/17/2004 3:39:51 AM Tom Mobley wrote:

I can measure mine and post. Mine are 1960 models but I'm not aware of any major changes. In the morning.

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Thanks... that would be great.

BTW, I got my answer about having trouble uploading the attachment check out the IS ANYONE ELSE HAVING TROUBLE ATTACHING FILES?? thread in the general section. Seems to be a server problem on their end. At least I'm not blacklisted...

Guess I'll wait and see... will get them up as soon as it works. 4.gif

Rob

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Ok, uploaded them to my FTP server... in the mean time.

It's on three sheets... it's free... and is for personally use only (ie: I'm hoping no one tries to put it up for sale on eBay). I had to convert the Acad file to jpg to allow it to be downloaded, but I kept the resolution as big as possible.

You can view them by clicking on the following links...

Klipsch Belle Plan 1of3

Klipsch Belle Plan 2of3

Klipsch Belle Plan 3of3

Let me know if it's good enough for the resolution, and if I've made any errors. Might as well do it correctly... 2.gif

Rob

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Rob,

I looked at those pics, but they're showing as like partial images or something. I downloaded them to my local drive, looked at them again from there, same thing?

Something goofy happen on the file conversion?

EDIT: I also looked at them with MS IE which I don't normally use, thought maybe it was my Firefox browser, but k no good there either?

Are these the same as the ones you had posted earlier? Those looked fine.

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Actually they are higher resolution... so i'm guessing you are using the newest IE and Firefox which now both shrink the image to fit on the screen. You can view them at 100% if you mouse over them and click on the zoom button that appears.

Hopefully it'll work...

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i looked at those files and sure enough internet explorer shrunk them. when i zoomed them they looked great. i copied them but with my woodworking skills there is no danger of speakers being built by me using those plans. but i am looking for khorn bass bin plans if anyone has them. i am not talented but i can be persistent.so if i got plans for a khorn i think i would use them. or i may have to resort to non klipsch bass bins. anyhway those were good plans helped me to understand the internal workings of the belle better. thanks les cornell

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thanks you are probably right. i can get way ahead of myself sometimes. i am absolutely rotten at building things with wood. but for khorn performance out of my speakers i would go the extra mile. my la scalas are totally satifying at this point but it is always fun to dream. les cornell

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les,

I finally dug through some of the stuff I have saved from past posts, and thought this was interesting. It's from djk, someone who is quite knowledgeable and has built a LOT of LaScala clones. About the Khorn, he posted this on the audio asylum forums:

"I dearly love K-horns. And for most people they are too much work to build for a 50hz horn. 57 trapezoid shaped boards some with compound mitre angles. About two gross of screws and nails on edge sometimes at an angle into 1/2" plywood."

So, yes, I'm not about to build any either. There are folks on here who have and I certainly respect them for that.

Marvel

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DM,

I think he is using the 50Hz spec from the size and flare of the horn itself. I pulled that from a comparison he made with the LS and difficulty in construction., so it is a little bit out of context.

Marvel

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Marvel, well, I dunno what he was talking about.

I measured Khorns and researched the plans pretty thoroughly while coming up with my own. The Khorn is a fixed exponential horn with a 78in throat and resolves to a 65 in length at the terminus. This would be an cross-sectional doubling point at 21.75 linear inches or an exponential expansion rate sufficient for a 40Hz Fc.

I am convinced that it is a true 40Hz fc horn.

DM2.gif

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  • 3 weeks later...

In 1975 I was fortunate enough to be honored as the second person to ever build BK's at Klipsch and Assoc. A job I only performed for a year

Although I was fresh out of college with 2 degrees the economy was so poor that I decided to spend the lag period enjoying my AV hobby and left Michigan to take a temporary job with Klipsch. It was really a family of employees that I found there. I had to go through a period of adjustment as a Yankee working in the south but I found a warm and friendly environment for my year working there.

At that time the BK was made with 9 ply russian timber. It was important that the seams in these all wood horns (cabinets) were sealed. That was done by the use of a unique and quick setting glue that was generously applied between the seams prior to the additional use of a air-nail gun. I was surprised to hear that the glue is no longer used in todays BKs. If that is true I would be surprised since the seal was key in preventing and whistling brought about by the forced air pumped though the horns (cabinet).

As for construction diagrams of these speakers I would anticipate that the only way to get them would be to buy a set and break them down and take the measurements yourself. Each piece was cut and crafted separately and then assembly was done by an assembly specialist.

After cabinet assembly, a carefully matched set of drivers were installed. Using an oscilliscope to check each piece the tweeters, mid-range and woofers were chosen to match identically for each pair assembled.

I still have my K-horns from those days. Still proudly displayed in my AV Room they resonate the history of the passion that went into building them. You see, the wood in this pair was quite unique and possessed a unique and powerful grain pattern. When I saw the (front boards) sitting in the factory I ran to get masking tape and a marker to put my name on them. I spent the next 3 months trying to find equally matching tops and side boards. When I had collected the boards for the cabinets we spent time after work locating the ideal drivers. When finally assembled we opened champagne and everyone in the crew signed the inside of the cabinets......it was a special time.

Here now in Grand Rapids, Michigan 30 years later... my home is filled with Klipsch speakers. My Living room and AV theatre are all Klipsch. Good luck finding the documents though. Even if you do find them they won't come up to the specs of a factory pair assembled in those early days at Klipsch in Hope Arkansas 1975......

You would be better off to find a used pair .....they have to be available somewhere. Have you thought of looking on Ebay for some BK's?

Regards,

Mark

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If any people from Klipsch 1975 frequent this site I'd appreciate hearing from you. So many friends there and after 30 years I am ashamed to say I forget the names.....Some I remember off hand were:

Bob Moers

Gary Gilliam

Danny my engineer roomate

Gary and his great brother who I am having trouble remembering his name

Andy

Brad

Gwen (who taught me to appreciate Willy Nelson)

Carol-Administration Secretary

Bobby Jo

Bobby "The Boxer"

Mark...."the yankee"

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On 11/6/2004 2:31:15 PM Tom Mobley wrote:

Andy is a regular here. Haven't seen him on in a while, I think he's doing a tour in the military right now.

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His alias is "HDBRbuilder" by the way... but like Tom said, he's been called in by his military.

There was another builder which Andy knew that comes here occasionnaly, but i don't think he's on your list. Might be from different years...

Rob

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Thanks for the info on Andy. I don't think he's the same one I knew though. Andy was in a management role at Klipsch in 1975, He would be about 55 now and I doubt that he'd have any military connections. If I heard his last name I;d know it but it's slipped my mind for the time being.....

Regards,

Mark

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