JohnA Posted January 21, 2000 Share Posted January 21, 2000 The discussion, "Modernize the Klipschorn ....", brought out a point that the K-400 throat and driver may be mismatched. It got me thinking about my own La Scalas. I bought them used and I am probably the 3rd owner. If I remove the K-55-V I have a red rubber washer in the throat and its i.d. is less than the i.d. of the horn and less than the o.d. of the screen protecting the phase plug of the -V. I'm pretty sure my speakers were monkeyed with before I got them, I just don't know how much. What size washer is correct? Shouldn't its i.d. be a smooth fit with the i.d. of the throat? John Quote Link to comment Share on other sites More sharing options...
filmofreddy Posted January 21, 2000 Share Posted January 21, 2000 Dear john, The washer may have been distorted by excess pressure for too many years. The ID should match up within a few thousands of the throat hole for the horn. The screen on the K55V is a "fooler" as I remember it rests on a hidden step beneath the screen. So the actual working throat of the Atlas driver is smaller than it appears from looking at the protective screen. I critically measured all of this long ago when cutting up K400s' to use bolt on drivers but unfortunatly I don't have immediate access to those notes(15 yrs. ago) but once everything was taken into consideration I don't believe we discovered anything that mis-matched. Plus, just about got my scanner issue sorted out so the Klipsch "packet" should be ready to fly by 28/Jan. Quote Link to comment Share on other sites More sharing options...
Guest " " Posted July 28, 2006 Share Posted July 28, 2006 to furthur complicate, the k-55-v (solder terminal) has a smaller opening than the k-55-v (push-pin terminal). Quote Link to comment Share on other sites More sharing options...
Daddy Dee Posted July 28, 2006 Share Posted July 28, 2006 I can't help with the measurements or their impact on the throat. I do know that Bob Crites has these washers available. I suppose Klipsch parts would also have them. Quote Link to comment Share on other sites More sharing options...
Al Klappenberger Posted July 28, 2006 Share Posted July 28, 2006 John, I don't think the mateing of the driver to the throat is very critical when it will only be used to 6 Khz. Some of the K500 sand-cast horns even have lumps of metal in the throat path. The ones in my Belles did. I cleand it out and heard no difference. I also have jurey-rigged k55 drivers on to the end of Altec VOT horns using simple flat particle boards. That's .7 inch flat into a 1 inch throat hole. The response measurements were ok. I think you can replace that little washer with anyhting you have. I use cut up foam place mats to mount inductors on the boards of my crossovers. I think that material would do nicely. Al K. Quote Link to comment Share on other sites More sharing options...
D-MAN Posted July 28, 2006 Share Posted July 28, 2006 Al is correct; the wavelengths involved at the operating bandwidth are too long, comparitively, to be concerned with tiny changes such as the types mentioned above. The gasket "gap" would introduce a very small capacitance being that technically forms a cavity. However, again, because of its size, it would only effect frequencies much higher than the operational bandwidth. I think you're quite safe and even with a new exactly sized gasket, you would not be able to determine a sonic difference, either with your ears or with a measuring device. DM Quote Link to comment Share on other sites More sharing options...
BEC Posted July 28, 2006 Share Posted July 28, 2006 Just measured a bunch of this stuff. Rubber washer ID is 0.72 inch K-400 throat is 0.70 inch K-55V (push term) outlet is 0.85 inch K-55V (solder term) outlet is 0.80 inch K-55M outlet is 0.72 inch Bob Quote Link to comment Share on other sites More sharing options...
DrWho Posted July 29, 2006 Share Posted July 29, 2006 interesting...2 year old thread getting dug up. Quote Link to comment Share on other sites More sharing options...
Al Klappenberger Posted July 29, 2006 Share Posted July 29, 2006 GACK! It is a very old thread. I didn't notice! John has probably moved on to lots more important things long ago! Al K. Quote Link to comment Share on other sites More sharing options...
Guest " " Posted July 29, 2006 Share Posted July 29, 2006 ""interesting...2 year old thread getting dug up."" There are a bunch of old threads that floated to the top yesterday as a result of a bug in the forum software. the bug if you have your view set to newest first then open the first active thread once opened select next in the upper right you wind up 5 years back instead of the next active thread. various post were made about this glitch. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.