windashine Posted September 15, 2018 Share Posted September 15, 2018 2 hours ago, jimjimbo said: Thread bump, and a great thread it is.....finally getting around to building a new pair of networks with all new parts including Jupiter VT and Audiocap PPT Theta caps. The Jupiters are huge, and I've had to reassess my board size and layout for which this thread has been very helpful. Thank you again Dean for all of this information. Are you using a K77 ? Quote Link to comment Share on other sites More sharing options...
jimjimbo Posted September 16, 2018 Share Posted September 16, 2018 3 hours ago, windashine said: Are you using a K77 ? May I ask the reason for your question? I have used K77 round Alnico, K77M square magnets, CT125 and CT120. Quote Link to comment Share on other sites More sharing options...
windashine Posted September 16, 2018 Share Posted September 16, 2018 just a learning curve thing, amazing thread, cool Jupiter's btw, I wondered if they would fry the original tweeters... original being that I just figured everyone has the K33, K55 & K77 set-up and if the drivers would need an upgrade too. The Jupiter made me think there's some "horsepower" inside it. I know that's a broad question, (here's the but part -->) but I have an older 54 Klipschorn with the K500-5000 crossovers and there's not a lot of specific remedies that I've found, except that I should change that board out, and I haven't seen a driver recommendation other than the 3 regular one's while reading here this evening, unless I missed it.... I know there's lot's of drivers "out there" and I respect the original thread topic and don't really need an answer, I'll always continue to read and wonder and eventually figure it out. Nevertheless, I have a leftover K77M square from a Heresy that I changed out with a CT110 that Mr Crites sold, that I could use in lieu of messing with the older University and leaking metal can cap on my Klipschorn, hence, the question, not intended to be a hit and run... Quote Link to comment Share on other sites More sharing options...
jimjimbo Posted September 16, 2018 Share Posted September 16, 2018 The K77 would still need the diode protection in the AA circuit, but not because of the caps, only because of the fragility of the tweeters themselves. I have switched over to the Crites tweeters for just about all of my speakers. Quote Link to comment Share on other sites More sharing options...
OO1 Posted September 17, 2018 Share Posted September 17, 2018 -I always keep spare K77 Tweeters Quote Link to comment Share on other sites More sharing options...
billybob Posted September 17, 2018 Share Posted September 17, 2018 Can attest to the ruggedness of the the K-77 alone as a most revealing tweeter. Diode aside, listening to a T-25 EV now and keeps coming back to it's root as a good one. Now volume may be the problem with some, of course. Cheers! Quote Link to comment Share on other sites More sharing options...
geoff. Posted September 2, 2019 Share Posted September 2, 2019 Another bump for a great thread Quote Link to comment Share on other sites More sharing options...
Deang Posted September 2, 2019 Author Share Posted September 2, 2019 I think some are conflating Al's ESNs with something like the popular and more conventional LR-4 alignment. These are two very different things! I see alot of correlation between room size, power levels and the type of network a person prefers. The AA is certainly not the end all in design sophistication, but it does sound very good to a lot of people - and it's a safe build for me, as I've never received a single complaint since building them, while I can't say that about other designs. Tweeter protection: tough call. While the K-77 isn't very robust, it does seem to withstand anything except an act of sheer stupidity, or a junk piece of gear. I add the diodes if I'm asked to, or if it's obvious to me the person is going to drive them to insane power levels. 2 Quote Link to comment Share on other sites More sharing options...
gparkhill Posted April 8, 2020 Share Posted April 8, 2020 I visited this thread many times over the past couple of years and always loved the Jupiter AA's that Dean built. Years ago I built a set of Alk Universals, and I was never pleased with the sound so disconnected them shoved the LaScala's back in the corner and focused on other speakers. Anyway, fast forward to now and I felt the desire to give the LaScala's another try and a new lease on life. I figured there was no better way than to come back here and follow Dean's lead. I also added a pair of CT-120's which seem to help. I spent a fair amount of time on the layout which I'm pleased with. The enjoyment came from reading, sourcing, preparing and assembling these. I drive these LaScala's with a 2A3 amp I built, and the whole setup works well. 2 Quote Link to comment Share on other sites More sharing options...
codewritinfool Posted April 8, 2020 Share Posted April 8, 2020 And? How does it sound???? Edit:nevermind. Too many beers. Sorry. Quote Link to comment Share on other sites More sharing options...
gparkhill Posted April 8, 2020 Share Posted April 8, 2020 I guess that is important... I think they are great, better than I expected. I've been listening for a few hours, all different types of genres and volumes. No issues. I was concerned that at higher volumes the sound quality would degrade, based on comments about the AA, but I'm pleased. Quote Link to comment Share on other sites More sharing options...
Outrider 6 Posted May 22, 2020 Share Posted May 22, 2020 On 4/7/2020 at 11:07 PM, gparkhill said: I guess that is important... I think they are great, better than I expected. I've been listening for a few hours, all different types of genres and volumes. No issues. I was concerned that at higher volumes the sound quality would degrade, based on comments about the AA, but I'm pleased. Look great, sound great, and were fun to build. Based on a proven design. What’s not to like? Any lessons learned? Things to emphasize? Thoughts on parts? Notes on assembly, such as mounting OT soldering? Thoughts on value / return on investment? Appreciate anything you can offer the community. Quote Link to comment Share on other sites More sharing options...
Davecv41 Posted May 22, 2020 Share Posted May 22, 2020 On 4/7/2020 at 8:39 PM, gparkhill said: I spent a fair amount of time on the layout which I'm pleased with. The enjoyment came from reading, sourcing, preparing and assembling these. I drive these LaScala's with a 2A3 amp I built, and the whole setup works well. Nice work. Anytime you can take wires that go from Point A to Point B and make them look good doing it, that's art. 2 Quote Link to comment Share on other sites More sharing options...
Deang Posted May 24, 2020 Author Share Posted May 24, 2020 Bet that was fun getting a screwdriver underneath that coil. Nice job. Quote Link to comment Share on other sites More sharing options...
Wirrunna Posted October 18, 2020 Share Posted October 18, 2020 Dean, what has happened to the photos and text ? Quote Link to comment Share on other sites More sharing options...
OO1 Posted October 18, 2020 Share Posted October 18, 2020 must have gotten deleted -------------when you clean up the pictures on your account and ------when you hit , delete ------removes everything - Quote Link to comment Share on other sites More sharing options...
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