Alexander Posted April 3, 2020 Share Posted April 3, 2020 Finding out that the forte III mid horn is a drop-in to my klf-30's (and 20's) I wonder how much difference may a mumps version of a given horn make. I guess what I am really after is what does the mumps do to improve a regular horn counter part?. Quote Link to comment Share on other sites More sharing options...
glens Posted April 3, 2020 Share Posted April 3, 2020 A related question is "how would you go about obtaining one?" I'm under the impression the answer to your question relates to improved pattern control throughout the range. 1 Quote Link to comment Share on other sites More sharing options...
PrestonTom Posted April 3, 2020 Share Posted April 3, 2020 You are under the impression that it is a "drop in" replacement for the KLF 30. Life is seldom that simple. One difference is the the Mumps horn is CD (controlled dispersion where the on-axis and off-axis frequency response is comparable). This has a big effect on the sound quality (usually an improvement in my opinion, if it is done correctly). However the new horn (and perhaps driver) will probably necessitate a change in the crossover. Is this something you would be comfortable doing? Is there someone out there with the competence and experience who has done this before? It is infrequent that simply swapping parts will bring about an improvement. It usually requires a system design approach, IMHO. Yes, I know that is not always a popular opinion on audio forums. Good luck, -Tom 1 Quote Link to comment Share on other sites More sharing options...
Alexander Posted April 3, 2020 Author Share Posted April 3, 2020 2 hours ago, PrestonTom said: You are under the impression that it is a "drop in" replacement for the KLF 30. Life is seldom that simple. One difference is the the Mumps horn is CD (controlled dispersion where the on-axis and off-axis frequency response is comparable). This has a big effect on the sound quality (usually an improvement in my opinion, if it is done correctly). However the new horn (and perhaps driver) will probably necessitate a change in the crossover. Is this something you would be comfortable doing? Is there someone out there with the competence and experience who has done this before? It is infrequent that simply swapping parts will bring about an improvement. It usually requires a system design approach, IMHO. Yes, I know that is not always a popular opinion on audio forums. Good luck, -Tom There are others that are considering the same kind of change over for different Klipsch models. So it would be safe to say that this would also apply to any of the other updated horns with mumps. Quote Link to comment Share on other sites More sharing options...
Alexander Posted April 3, 2020 Author Share Posted April 3, 2020 2 hours ago, glens said: A related question is "how would you go about obtaining one?" ..... I have sent in an email to Klipsch asking that question, will get back with their reply Quote Link to comment Share on other sites More sharing options...
Alexander Posted April 9, 2020 Author Share Posted April 9, 2020 On 4/3/2020 at 3:54 PM, PrestonTom said: You are under the impression that it is a "drop in" replacement for the KLF 30. Life is seldom that simple. One difference is the the Mumps horn is CD (controlled dispersion where the on-axis and off-axis frequency response is comparable). This has a big effect on the sound quality (usually an improvement in my opinion, if it is done correctly). However the new horn (and perhaps driver) will probably necessitate a change in the crossover. Is this something you would be comfortable doing? Is there someone out there with the competence and experience who has done this before? It is infrequent that simply swapping parts will bring about an improvement. It usually requires a system design approach, IMHO. Yes, I know that is not always a popular opinion on audio forums. Good luck, -Tom To answer one of your questions of being willing to make changes to the xo. The answer would be yes if I find out what needs to be changed . Waiting on a calibrated mic and to be used with REW to first measure the klf-30's in the original stock config, then re-introduce the a55g then finally the forte III horn with and without the a55g if they are available (and not too pricey) Quote Link to comment Share on other sites More sharing options...
JohnA Posted April 10, 2020 Share Posted April 10, 2020 What is the crossover point from woofer to squawker in a KLF-30? Mumphs are intended to maintain dispersion at the lower end of the horn's frequency range. If the KLF crosses too high, there won't be any difference. Quote Link to comment Share on other sites More sharing options...
Alexander Posted April 10, 2020 Author Share Posted April 10, 2020 14 minutes ago, JohnA said: What is the crossover point from woofer to squawker in a KLF-30? Mumphs are intended to maintain dispersion at the lower end of the horn's frequency range. If the KLF crosses too high, there won't be any difference. I believe it is 825Hz Quote Link to comment Share on other sites More sharing options...
JohnA Posted April 10, 2020 Share Posted April 10, 2020 Well, since the Forte III crosses at 650 Hz, mumps may well be pointless without a crossover network redesign. I can't imagine they'd hurt anything, other than your wallet. Quote Link to comment Share on other sites More sharing options...
MechEngVic Posted April 11, 2020 Share Posted April 11, 2020 On 4/9/2020 at 5:50 PM, JohnA said: What is the crossover point from woofer to squawker in a KLF-30? Mumphs are intended to maintain dispersion at the lower end of the horn's frequency range. If the KLF crosses too high, there won't be any difference. Is this the only benefit of mumps? Quote Link to comment Share on other sites More sharing options...
Alexander Posted April 13, 2020 Author Share Posted April 13, 2020 This is the $64,000 question. Provided the forte III horn's are not too expensive and of course available some of us want to find out. Quote Link to comment Share on other sites More sharing options...
cwmt101 Posted December 30, 2022 Share Posted December 30, 2022 Can anybody tell me how the term MUMPS came about? Is it an acronym? Quote Link to comment Share on other sites More sharing options...
jjptkd Posted December 30, 2022 Share Posted December 30, 2022 1 hour ago, cwmt101 said: Can anybody tell me how the term MUMPS came about? Is it an acronym? 2 Quote Link to comment Share on other sites More sharing options...
dtr20 Posted January 8, 2023 Share Posted January 8, 2023 In case anyone was wondering, the forte 3 midrange horns have the screw on driver connector on the back. I'm using the original A55G midrange drivers in the forte III horns in my Chorus II speakers. 1 Quote Link to comment Share on other sites More sharing options...
Deang Posted January 8, 2023 Share Posted January 8, 2023 1 hour ago, dtr20 said: I'm using the original A55G midrange drivers in the forte III horns in my Chorus II speakers. I read that three times and I’m still not quite sure of what you’re doing. People are also using it in the KLF 20 and 30 which I don’t really understand either. Quote Link to comment Share on other sites More sharing options...
jjptkd Posted January 8, 2023 Share Posted January 8, 2023 1 hour ago, Deang said: I read that three times and I’m still not quite sure of what you’re doing. People are also using it in the KLF 20 and 30 which I don’t really understand either. Quote Link to comment Share on other sites More sharing options...
mopardave Posted January 9, 2023 Share Posted January 9, 2023 Where are people finding these horns? I didn't think klipsch sold these loose. 1 Quote Link to comment Share on other sites More sharing options...
dtr20 Posted January 20, 2023 Share Posted January 20, 2023 On 1/8/2023 at 3:15 PM, Deang said: I read that three times and I’m still not quite sure of what you’re doing. People are also using it in the KLF 20 and 30 which I don’t really understand either. You can see the picture @jjptkd posted. That is my speaker. I designed and 3D printed some brackets to have the forte III horn fit in the chorus II. Since the horn has the driver screw into it, I was able to use the A55G drivers in these. I checked with Bob Crites beforehand to make sure it was safe to do so. It sounds great. I got lucky and ordered the horns before Klipsch required serial numbers to order parts. 1 Quote Link to comment Share on other sites More sharing options...
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