longdrive03 Posted January 20, 2009 Share Posted January 20, 2009 Considering building a LaScala or University Classic bass bin. I'm looking at an aluminum cone 4 ohm woofer with heavy foam rubber suspension. Don't know the specs on it yet but if it's close to the K-33 does anyone see any problems. Thanks. Quote Link to comment Share on other sites More sharing options...
Guest " " Posted January 20, 2009 Share Posted January 20, 2009 it's not that simple. the spec's of the k-33 are pretty unique. you should compare the spec's. Quote Link to comment Share on other sites More sharing options...
longdrive03 Posted January 20, 2009 Author Share Posted January 20, 2009 Yeah, I'm trying to see how close the specs are on this unit. Might not work. But if they are close do you see any problem with the aluminum cone or foam roll surround? I know the K-33 has an accordion edge and paper cone. The K-31-E used in the Jubilee has a rubber surround so I thought it might work. Thanks for the comment. Quote Link to comment Share on other sites More sharing options...
PrestonTom Posted January 20, 2009 Share Posted January 20, 2009 You really need to take the above advice seriously. Worry less about the material in the surround and worry more about the T/S parameters of the possible "upgrade". Keep in mind that the K33 is not the weak link in the LA Scala cabinet Quote Link to comment Share on other sites More sharing options...
longdrive03 Posted January 20, 2009 Author Share Posted January 20, 2009 I will certainly look at the T/S specs first and if not very close won't proceed. My main question is, assumng the T/S specs are very close, does anyone foresee a problem with this driver simply because it has a foam surround and aluminum cone? Certainly don't want any ringing in the cone or a floppy cone because of the foam surround. Thanks for the replies. Quote Link to comment Share on other sites More sharing options...
Daddy Dee Posted January 20, 2009 Share Posted January 20, 2009 Well, you sure could not go wrong with a Crites woofer. Quote Link to comment Share on other sites More sharing options...
WMcD Posted January 20, 2009 Share Posted January 20, 2009 1) You should take a close look at the actual basket diameter of the driver and the width of the doghouse which you build. 2) There may be an issue with the forward excursion of the diaphragm. It might bump up against the motorboard on which it is mounted. The K-33 has an extra thick gasket to handle the issue. You may have to design some sort of spacer. I had wondered about the rubber surround used in the Jubilee. Wouldn't it oil can (move from concave to convex) when air pressure is applied by the movement of the diaphragm? Apparently this is not an issue since the Klipsch engineers would know best, and it works okay. Wm McD Quote Link to comment Share on other sites More sharing options...
greg928gts Posted January 20, 2009 Share Posted January 20, 2009 Certainly don't want any ringing in the cone or a floppy cone because of the foam surround. If that were to happen, you'd find that one or more of the T/S parameters were off. Why not just get a K-33 from Klipsch or one of Bob Crites woofers? Both work great in the LS bass bin and they're reasonably priced. Greg Quote Link to comment Share on other sites More sharing options...
longdrive03 Posted January 22, 2009 Author Share Posted January 22, 2009 Hi guys thanks for the posts. Main issue is cost - can get these cheaper but don't want them unless they are very very close as Elmer Fudd would say. I'm sure Bob's woofers would be great. Quote Link to comment Share on other sites More sharing options...
Coytee Posted January 23, 2009 Share Posted January 23, 2009 I don't pretend to know any answers, especially after walking in here after these guys. (they're all the brainiacs in the crowd with pocket protectors) [] I've got a pair of Electrovoice Interface D speakers (bought new by me in 1978) that have some kind of rubber surround on them. The surround rots out on them after about 10 years and has to be redone. I've had it done a couple times now. I've got a pair of LaScalas with the paper surround (or what ever they use) that I bought new in 1979 and these are still going strong with no foam rot. Yours might not rot and/or it might not be a big deal but I personally don't like the foam rot. Quote Link to comment Share on other sites More sharing options...
Q-Man Posted January 23, 2009 Share Posted January 23, 2009 1) You should take a close look at the actual basket diameter of the driver and the width of the doghouse which you build. 2) There may be an issue with the forward excursion of the diaphragm. It might bump up against the motorboard on which it is mounted. The K-33 has an extra thick gasket to handle the issue. You may have to design some sort of spacer. I had wondered about the rubber surround used in the Jubilee. Wouldn't it oil can (move from concave to convex) when air pressure is applied by the movement of the diaphragm? Apparently this is not an issue since the Klipsch engineers would know best, and it works okay. Wm McD William is right. The surround will press up againts the motorboard just by screwing it onto it. The K-33 is cheap $$$$$. It also will work better then a much more expensive woofer. Keep reading the forum. You will see that some of us have replaced the mid. range drivers, horns, tweeters, networks., but we still all use the K-33. The parts we use are also much more expensive then the ones that Klipsch uses. Not the other way around. 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.