BEC Posted February 15, 2006 Share Posted February 15, 2006 Moon, The new tweeter replaces the K-77, not the K-79. The K-79 has a larger horn and lower sensitivity. Bob Crites Quote Link to comment Share on other sites More sharing options...
formica Posted February 15, 2006 Share Posted February 15, 2006 Moon, The new tweeter replaces the K-77, not the K-79. The K-79 has a larger horn and lower sensitivity. Bob Crites In other words, which x-over are you using? One which was matched to the K-79 isn't the same as one matched to a K-77 (or BEC-77) Quote Link to comment Share on other sites More sharing options...
m00n Posted February 15, 2006 Share Posted February 15, 2006 Cool thanks guys. I had a feeling that it was not going to be a valid option for me. Not that I have any issues with the K79s. As far as crossover, I'm looking at CW2s. Quote Link to comment Share on other sites More sharing options...
Deang Posted February 15, 2006 Share Posted February 15, 2006 Bob, I don't want you to think I'm trying to pee in your Cheerios, but I want to throw something out here to consider. From my point of view, it's a good thing, not a bad thing -- though you might not be too keen on the possibility. If you compare the earlier trace you posted with JC's RTA measurement -- you'll see they are very much alike (notice that your plot is marked off in increments of 10, while JC's is marked off in increments of 5). The similarity is especially surprising since they were taken in different rooms with different ways of measuring. What they both clearly show is that through much of the audible range the K-77-M is a bit more sensitive. The 105dB/2.83v sensitivity rating of the Eminence APT-50 was derived while on a plane wave tube -- when attached to a horn that's going to go down some -- and both plots seem to substantiate that. So, what I'm thinking is that if I'm a Cornwall II user -- I'm going to at least give the new tweeter a try. As far as the slight loss of sensitivity (compared to the K-77-M) in how it relates to the speakers you created the replacement for -- it's a non-issue. Lower distortion, superior dynamics and extension more than make up for it -- as the reported listening tests confirm. Quote Link to comment Share on other sites More sharing options...
Daddy Dee Posted February 15, 2006 Share Posted February 15, 2006 "To me that is a true tribute to PWK heritage ..keeping his designs up to date and relevant to what is available." Not necessarily true. How to say this? Maybe F. Klipsch, J. Hunter, and R. Delgado feel that the best way to honor and pay tribute to PWK is to leave them the hell alone for the most part. There have always been "better" tweeters and "better" horns, and they were certainly around when PK was still actively engaged at Klipsch. They are what they are because he liked them that way. I don't believe there's been anything done by anyone on this forum that he didn't already do or try. It's really mostly a hobby with us -- but it was his life. So in the end, what you have is a fingerprint of his mind, an extension of his very self. Imagine those guys sitting around a table, and how hard it might be even to talk about changing them. It probably conjurs up the same kind of feelings that planning an adulterous affair might. We have the benefit of disconnect -- they don't -- they were around him for decades. Maybe the answer is to offer a "substitution package" -- like options you choose from when you buy a new car. What Dean has stated in this center paragraph is PRECISELY what I was told by Mr. Delgado in a private conversation while in Hope last summer. I think others present could relay the same sentiment. The mid horns were left alone in part as tribute to PWK, that his signature would forever be on HIS Heritage series of speakers. That is the most significant reason why this line of speakers kept the 401/601 horns. Michael Michael, Thanks. Quite an interesting insight from Mr. Delgado. Quote Link to comment Share on other sites More sharing options...
BEC Posted February 15, 2006 Share Posted February 15, 2006 Dean, Sensitivity issues aside, how do you get around the fact that the horns on the K-77 (CT-125) and K-79 are a different size? Another horn would have to be molded to address that size difference. Bob Crites Quote Link to comment Share on other sites More sharing options...
Deang Posted February 15, 2006 Share Posted February 15, 2006 Ah crap. I totally forgot about that -- what a shame. Quote Link to comment Share on other sites More sharing options...
Deang Posted February 15, 2006 Share Posted February 15, 2006 Double post. Quote Link to comment Share on other sites More sharing options...
psg Posted February 21, 2006 Share Posted February 21, 2006 Question for Dean: I've been using your Super AA networks for a few months now in my LaScalas (& love 'em). Would they need to be modified to work with Bob's tweeters? Would be interested in opinions from others using Dean's networks with these tweeters. Thanks! I haven't seen the answer to this one... I'd like to know too 'cause I want both upgrades! [] Quote Link to comment Share on other sites More sharing options...
Kudret Posted February 21, 2006 Share Posted February 21, 2006 Peter, Are you going for trachorns and BEC tweeters? I am thinking about JBL 2404H and Altec 511B. Kudret Quote Link to comment Share on other sites More sharing options...
BEC Posted February 21, 2006 Share Posted February 21, 2006 he new CT-125 will replace a K-77 in every case and offer improved sound in my opinion. If the crossover is right for the K-77, it should be right for the CT125. The CT-125 will allow lowering the crossover from the mid to tweeter, but certainly does not require it. Now if the guys building the horns would just get them to me, I could start shipping these things. Bob Crites Quote Link to comment Share on other sites More sharing options...
Daddy Dee Posted February 21, 2006 Share Posted February 21, 2006 Question for Dean: I've been using your Super AA networks for a few months now in my LaScalas (& love 'em). Would they need to be modified to work with Bob's tweeters? Would be interested in opinions from others using Dean's networks with these tweeters. Thanks! I haven't seen the answer to this one... I'd like to know too 'cause I want both upgrades! [] I have listened to the BEC tweeter with a pair of super AA's (thanks to a generous forum member) and the combination sounds very good. It's a drop in replacement for the K77. Quote Link to comment Share on other sites More sharing options...
psg Posted February 22, 2006 Share Posted February 22, 2006 Thanks guys. Kudret, No I meant the super-AA and BEC-Tweeter upgrades. I'm not up to modding the cabinet yet! Bob, Please put me down for a set of tweeters. If you want, perhaps we could arrange payment in advance so you can ship when you get 'em. I'm in Canada, so shipping by USPS is preferred (UPS and FEDEX charge brokerage fees). This is going to be a cool add-on. Quote Link to comment Share on other sites More sharing options...
formica Posted February 22, 2006 Share Posted February 22, 2006 I am thinking about JBL 2404H and Altec 511B. Nice combo... I'd love to hear those 2404H's on a Khorn.... Quote Link to comment Share on other sites More sharing options...
Kudret Posted February 22, 2006 Share Posted February 22, 2006 Hi Rob, I bought one 2404H and looking for another. We'll arrange a get together once they are on the Khorns. Kudret Quote Link to comment Share on other sites More sharing options...
Deang Posted February 22, 2006 Share Posted February 22, 2006 Almost comical how diplomatic Daddy Dee and Bob have been with their comments regarding their comparisons of the Beyma and the Eminence APT-50. Now that I've had a chance to do the comparison myself I would have to say that in these speakers at least -- the little Eminence makes the Beyma sound like a big overpriced POS. Thanks Bob! Quote Link to comment Share on other sites More sharing options...
JohnA Posted February 22, 2006 Share Posted February 22, 2006 Aw Dean, Tell us what you really think! LOL! Quote Link to comment Share on other sites More sharing options...
Kudret Posted February 22, 2006 Share Posted February 22, 2006 John, DeanG, What kind of modifications I should be doing to attenuate JBL 2404H to be used with DHA2xovers? Here is the version I am using: Kudret Quote Link to comment Share on other sites More sharing options...
Deang Posted February 22, 2006 Share Posted February 22, 2006 As far as I'm concerned the right way to do it is to add a 2nd autoformer for the tweeter. Wire it the same way as the first autoformer -- filter behind the autoformer and float the ground. Quote Link to comment Share on other sites More sharing options...
Kudret Posted February 22, 2006 Share Posted February 22, 2006 Thanks, Dean. -- filter behind the autoformer I have a feeling that that involves more than the 3.3 uF cap right? Kudret 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.