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JSE "Infinite Slope" info needed!
- Thread starter mg196
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Violin
New Member
My 10" woofers had been re-foamed and sounded just fine when I bought them. It was still worth the upgrade to me. The bass response is below my audible threshold now judging by how the house vibrates on deep bass passages.
I was able to sell all my drivers on eBay for about $25 each plus shipping - they sold as two pairs. They took about 2 months to sell but helped pay for the upgrade. I'm sure you paid more than $25 to rebuild each driver.
I wouldn't recommend attempting a crossover rebuild unless you're good with a soldering iron. I took lots of photos first, labeled the capacitance values on a print of one of the photos and worked on one at a time so I'd have the other as a reference if I got confused. I ordered my caps through Sonic Craft as they'll match pairs for a fee. Madisound does not offer that service. The new caps were much larger than the old so I transferred everything over to a new, larger piece of MDF. Everything is held down with hot glue which softens up with a heat gun.
A word of caution: the labeled uF values on the capacitors does not necessarily correspond to what was intended at that location. Mine had a bundle of four 22uF caps that John said was supposed to be a 100uF value (and they measured near that).
I was able to sell all my drivers on eBay for about $25 each plus shipping - they sold as two pairs. They took about 2 months to sell but helped pay for the upgrade. I'm sure you paid more than $25 to rebuild each driver.
I wouldn't recommend attempting a crossover rebuild unless you're good with a soldering iron. I took lots of photos first, labeled the capacitance values on a print of one of the photos and worked on one at a time so I'd have the other as a reference if I got confused. I ordered my caps through Sonic Craft as they'll match pairs for a fee. Madisound does not offer that service. The new caps were much larger than the old so I transferred everything over to a new, larger piece of MDF. Everything is held down with hot glue which softens up with a heat gun.
A word of caution: the labeled uF values on the capacitors does not necessarily correspond to what was intended at that location. Mine had a bundle of four 22uF caps that John said was supposed to be a 100uF value (and they measured near that).
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Hello!
I wanted to chime in and revive this great thread. Thanks to Violin and chucksrt for all the info and enthusiasm on these great JSE speakers.
I'm an original owner of Model 1's. In 1987 I was looking at buying a pair of 3-way Heybrook speakers when I happened to walk into Hollywood Sound in FL. He sold the JSE line. I almost didn't even audition them because when I first looked at the Model 1 that he recommended in that price range, I wasn't impressed with the design. I tapped the woofer and saw the mid move and thought hmm, doesn't even have a separate sub-chamber for the mid. Little did I know...
Well, after a demo of the speakers I was sold. They did something that I've never heard before, they had incredible detail and dynamics, not to mention imaging, and seemed to be very "truthful". So these should be a good base to build a system on I thought. I bought his demo pair in oak veneer that had been tweaked: Straight Wire internal wiring, drivers baskets deadened with modeling clay including the sub-camber of the D28 tweeter, better binding posts, felt surrounding the mid and tweeter to minimize diffraction, and casters removed using the optional Model 1 speaker stands--filled with lead shot. All for $950, probably the best investment in audio equipment I've ever made.
I wanted to chime in and revive this great thread. Thanks to Violin and chucksrt for all the info and enthusiasm on these great JSE speakers.
I'm an original owner of Model 1's. In 1987 I was looking at buying a pair of 3-way Heybrook speakers when I happened to walk into Hollywood Sound in FL. He sold the JSE line. I almost didn't even audition them because when I first looked at the Model 1 that he recommended in that price range, I wasn't impressed with the design. I tapped the woofer and saw the mid move and thought hmm, doesn't even have a separate sub-chamber for the mid. Little did I know...
Well, after a demo of the speakers I was sold. They did something that I've never heard before, they had incredible detail and dynamics, not to mention imaging, and seemed to be very "truthful". So these should be a good base to build a system on I thought. I bought his demo pair in oak veneer that had been tweaked: Straight Wire internal wiring, drivers baskets deadened with modeling clay including the sub-camber of the D28 tweeter, better binding posts, felt surrounding the mid and tweeter to minimize diffraction, and casters removed using the optional Model 1 speaker stands--filled with lead shot. All for $950, probably the best investment in audio equipment I've ever made.
I love this thread. Update. I have an addiction. Infinite slopes are all i see. I have sold my model 1 set and now currently own,
1 pair of 1.8a
2 pair of .6
1 pair of .8... rare from what i have found. The .8 look like a dual 8" woofer version of the. 6.
The 1.8a set needed the woofers refoamed so i brought them to Miller sound and had him refoam them and balance the cones. All i can say is wow! I would really like to find another set of 1.8a or model 2 speakers. I will try to take some pics. soon.
1 pair of 1.8a
2 pair of .6
1 pair of .8... rare from what i have found. The .8 look like a dual 8" woofer version of the. 6.
The 1.8a set needed the woofers refoamed so i brought them to Miller sound and had him refoam them and balance the cones. All i can say is wow! I would really like to find another set of 1.8a or model 2 speakers. I will try to take some pics. soon.
Violin
New Member
Wow! Awesome. I will be placing a bid. Thanks!
So, I recently picked up a set of more well known floor standing speakers, and the seller said I could have the JSE 0.6 for a little extra, that they were great for something that small. So I did, and the larger ones sounded fine. Eventually I just tried the 0.6, putting it way higher than the manual says, on top of the floor standers, just for a quick trial. Definitely different. My son, who plays a string instrument, said these sounded better (same music, same electronics), and he was a pretty good player sitting in the middle of his high school orchestra - a good judge of instrumentals' sound. To wrap up several items in this long running thread: 1) As with most, the gold label on the back says "JSE infinite slope", with no model number. Clearly as seen in this thread, the size tells you the model number. 2) The gold labels say "519 East Middle Turnpike, Manchester, CT" which is, per an earlier post's guess, a suburb northeast of Hartford. 3) I understand from several sources that Joseph Audio Pulsars have the license for the infinite slope patent now. This is actually what made me try the 0.6 'extras' I obtained, because the first time I heard the Pulsars at a New York City audio show I was very impressed. So I assumed the JSE might be great for its size too 4) Source Technologies seems to be at http://www.sourcespeaker.com/
South Windsor is close to Manchester (both are about a half hour from me). Their 'about' page confirms the connection to the designer. I am assuming therefore that Source does not use infinite slope technology as it is now licensed to Joseph. 5) Since the Internet is a great way to pay it forward, I am going to thank another Internet contributor for sending me info about these (hoping that person is in this thread). The file he send me is an 8 Mb PDF, too big to upload here, but containing many of the posting attachments found in this thread. I am running an equally obscure electronics chain, Kinergetics KPA-1 pre-amp and KBA-75 amp (full class A solid state with the BTU output to prove it and an OEM fan to keep it alive).
I'll also throw in that tube fans should check out https://tavishdesign.com/
I have met the designer and heard his products and design philosophy.
South Windsor is close to Manchester (both are about a half hour from me). Their 'about' page confirms the connection to the designer. I am assuming therefore that Source does not use infinite slope technology as it is now licensed to Joseph. 5) Since the Internet is a great way to pay it forward, I am going to thank another Internet contributor for sending me info about these (hoping that person is in this thread). The file he send me is an 8 Mb PDF, too big to upload here, but containing many of the posting attachments found in this thread. I am running an equally obscure electronics chain, Kinergetics KPA-1 pre-amp and KBA-75 amp (full class A solid state with the BTU output to prove it and an OEM fan to keep it alive).
I'll also throw in that tube fans should check out https://tavishdesign.com/
I have met the designer and heard his products and design philosophy.
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Don Williams
New Member
We may be able to help eachother. . I have a pair of model 2a's with 12 and 10 woofers. mid that is in its own sub enclosure and two soft dome tweeters one is a dynaudio d21af. The photos show the mid speaker and the(high)and (lllow) tweeters. The 12 and 10 need re foaming. And the white veneer cabinets on coasters. And of course the Infinite slope crossovers
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johnsabatini
New Member
Hi
I recently got a pair of INFINITE SLOPE speakers. the case does not slope here are 2 pics.
can anyone tell me any info on them.
I'll upload pics of back label soon.
but any info would be nice.
Thanks
John
I recently got a pair of INFINITE SLOPE speakers. the case does not slope here are 2 pics.
can anyone tell me any info on them.
I'll upload pics of back label soon.
but any info would be nice.
Thanks
John
johnsabatini
New Member
They are 29in tall 12in wide and 14.5 in deep
johnsabatini
New Member
Also back label
zacjones99
New Member
Just stumbled on this great thread here for fellow JSE owners to collaborate. I picked up a pair of 1.8's on CL last night with the D28AF tweeters. Found them by a search for dynaudio as I was trying to find a pair of mains to timber match my existing Dynaudio center channel. I bought the Dynaudio center a couple months ago, mostly because I had a pair of T330D that I pulled out of an old pair of speakers that weren't working out. So my plan was to build my own mains or find a screaming deal on some matching dynaudio towers.
After auditioning these JSE towers at the seller's house I immediately came to the conclusion that they were going to be a much nicer speaker for me than my current KEF Q300's. Not really a fair comparison, but that's not the point. So I went home, consulted my wife, and ended up driving right back over there to buy them, hoping that (A) they would sound something like the way they did at the seller's house in my own home, which has a lot of acoustical challenges (large open floor plan, travertine floors on a concrete slab), and (B) my wife would not hate the way they look. Set them up immediately and without any attempt at positioning they were a night and day upgrade. I'm extremely happy with them as is. Unbelievably, my wife even likes the way they look better than the sleeker KEF's. And this after she said she didn't want big speakers in the livingroom. These speakers are 43x16x16 without the slope and weigh 140 pounds each! Imagine the odds!
They're the gloss black and the cabinets are in near perfect condition. The tweeters are pretty beat up looking--lots of indentations, some severe, but other than that the drivers look good and the 10" woofers have reportedly been refoamed recently.
It sounds like my Dynaudio T330D tweeters would be a drop-in replacement, if only they would drop right in. The current cutout for the D28AF is likely either 86 or 90mm, vs a 110mm cutout required for the the T330D. Also the faceplate for the T330D would have to be machined / scalloped as it would slightly overlap the midrange below. My woodworking skills are good enough to accomplish the task of enlarging the cutout with a router and a circle jig, and there's a muffler shop down the road that has a CNC plasma cutter to make a perfect faceplate cut.
So I guess my main question is: If I'm not afraid to do the work, is this really a good opportunity to put my 330D's to use -- would they be a good match to the other drivers in the 1.8? I would think so, but I'd rather ask first and cut later. I will try and get ahold of the designer as well as it sounds like he may still be helping people out in keeping these beautiful speakers at their best.
My second question is about replacing the 10" woofer. Does anyone know the current recommended replacement 10" woofer? That is likely a question for JS as well.
Here's a photo of them in their new home, when not positioned for critical listening. They still sound really good there, stuffed against the wall and into a corner. Gotta love 140 pound speakers with casters!
After auditioning these JSE towers at the seller's house I immediately came to the conclusion that they were going to be a much nicer speaker for me than my current KEF Q300's. Not really a fair comparison, but that's not the point. So I went home, consulted my wife, and ended up driving right back over there to buy them, hoping that (A) they would sound something like the way they did at the seller's house in my own home, which has a lot of acoustical challenges (large open floor plan, travertine floors on a concrete slab), and (B) my wife would not hate the way they look. Set them up immediately and without any attempt at positioning they were a night and day upgrade. I'm extremely happy with them as is. Unbelievably, my wife even likes the way they look better than the sleeker KEF's. And this after she said she didn't want big speakers in the livingroom. These speakers are 43x16x16 without the slope and weigh 140 pounds each! Imagine the odds!
They're the gloss black and the cabinets are in near perfect condition. The tweeters are pretty beat up looking--lots of indentations, some severe, but other than that the drivers look good and the 10" woofers have reportedly been refoamed recently.
It sounds like my Dynaudio T330D tweeters would be a drop-in replacement, if only they would drop right in. The current cutout for the D28AF is likely either 86 or 90mm, vs a 110mm cutout required for the the T330D. Also the faceplate for the T330D would have to be machined / scalloped as it would slightly overlap the midrange below. My woodworking skills are good enough to accomplish the task of enlarging the cutout with a router and a circle jig, and there's a muffler shop down the road that has a CNC plasma cutter to make a perfect faceplate cut.
So I guess my main question is: If I'm not afraid to do the work, is this really a good opportunity to put my 330D's to use -- would they be a good match to the other drivers in the 1.8? I would think so, but I'd rather ask first and cut later. I will try and get ahold of the designer as well as it sounds like he may still be helping people out in keeping these beautiful speakers at their best.
My second question is about replacing the 10" woofer. Does anyone know the current recommended replacement 10" woofer? That is likely a question for JS as well.
Here's a photo of them in their new home, when not positioned for critical listening. They still sound really good there, stuffed against the wall and into a corner. Gotta love 140 pound speakers with casters!
I'm a little befuddled by the combination of your enthusiasm for the speakers and your desire to immediately change the drivers. A really good speaker system is the result of synergy between all the components (and in the case of a speaker with an unusual crossover, that goes double), and changing one, even for a 'better' component may destroy that synergy. That tweeter is very fine, and it is unlikely that those dents actually have any effect.
Certainly talk to John Solecito about your ideas, but, even if he green lights your plans, start by doing it in easily reversible ways -- don't route out the baffle until you have listened with the tweeter just held in place with Moretite or something similar that can be easily removed with no trace.
Certainly talk to John Solecito about your ideas, but, even if he green lights your plans, start by doing it in easily reversible ways -- don't route out the baffle until you have listened with the tweeter just held in place with Moretite or something similar that can be easily removed with no trace.
zacjones99
New Member
I think a large portion of the enthusiasm I have for these speakers comes from my wife's surprising acceptance of a larger speaker in the downstairs living room. These large 4-way wide baffle towers inherently play a much fuller, richer sound than my previous 6.5" bookshelf speakers could provide. These speakers also remind me of my glory days in college with the first speakers I ever bought - a pair of Infinity SM150's with a similar four way design.
Prior to a couple days ago, she had made it very clear that after a ridiculous all out theater installation upstairs (3 Danley SM60F and 8x18 IB subwoofers) if I wanted to listen to music I could just go upstairs. But the theater is heavily deadened and not setup for two channel audio. My initial impressions of these JSE towers are that I'm very impressed with the sound quality and dynamic range. Why mess with a good thing? Why, in the hopes of making it better of course.
I know that Dynaudio often recommends upgrading their tweeters to an improved version with no crossover changes, and people tend to be pleased with the results. The T330D is supposed to be one of the best tweeters they ever made, and I've heard them before in another speaker and liked them very much. I would think that the extremely sharp cutoff of the infinite slope crossover would tend to make things easier to integrate than the standard crossover, not more difficult.
But I do understand that a speaker is designed for the speakers to work together and that is why I asked for opinions on the matter.
I will certainly keep trying to contact him by phone.
Pre-mounting is a great idea. I will definitely give that a try before cutting any holes. It looks like the back of the T330D tapers in enough so that I should be able to semi-mount it for a quick test listen. That Moretite looks like a good recommendation to help hold it in place. Perhaps I'll run some string through each of the three mounting holes just in case.
Thanks for your input!
clintster
New Member
Hi, I know this is an old thread but I was hoping you could help. I recently purchased a pair of jse infinite slope 1's and while I am amazed at the sound and clarity (coming from 1 speaker) I think there's a problem with the other one. They are sequential serial numbers and have the focal mids but the one speaker that sounds off has several different capacitors compared to the other speaker and it really doesn't sound right to me compared to the other one. It's quieter and muddier in the highs. I'd like to do a full recap but I want to use the same capacitors and values as the other (good) one and I really don't know what to use?? I tried contacting John Sollecito with no luck but actually spoke to Richard Modeferri who is a super cool guy but since he didn't actually have anything to do with the actual building and capacitor selection at jse, he's at a bit of a disadvantage. Do you have a parts list and or diagram? Any help you could provide would be most appreciated!
Remove the tweeters, measure resistances and compare.
One of the Dynaudio tweeters inexplicably measured 20 ohms on one of mine.
I'd check all the drivers before I did a recap.