New to this channel... I rebuild, do complete restorations to vintage electronics... but have great reservation with speaker work... the skill of electro-mechanical fitment... I immensely appreciate what you do... Thank you for sharing your skill, knowledge and experience. I have a pristine pair of L36 that I am rebuilding (replacing damaged pots and adding film caps) you have me now re-thinking about (against changing out) the inductors... your voice of experience rules. That looks like a new woofer...
I've done a number of re-foams including a couple without shimming. I got away with it but I agree it's not worth the risk. Next time I'll be pulling the dust caps and using shims. I've re-foamed a pair of LE14 woofers before and that was by far the most tedious I've done so far. JBL's glue is no joke when it's 40 years old. This video shows first class craftsmanship.
On my way to be doing a refoaming repair myself for the very first time, I am really happy with finding this video. I love my old JBL Decade 36's (L36). They give me just the right sound in my studio, so I'll go all the way keeping them running for the next one or two decades :-) I love the way You take the time to get everything cleaned up, all the details right etc to get the best result possible. I really appreciate that.. And the detail in keeping / reusing the dust cap is such a nice touch... Thank You so much for doing this video. All my best wishes to You and Yours. Stay safe...
Fantastic tutorial. I followed every step as thouroughly as I could and the result is just perfect. Thank you so much indeed! I may have to refoam a pair of JBL 240ti soon. They look even more frightening than the jubals. Any advice would be more than welcome. Thanks again.
That's great, I'm glad our video's helped. We are being driven out of business by the corporate government takeover of the economy. Any suggestions on how we can continue to do our life's work and pay the rent?
Nice. I am going to do a cerwin vega 12' in a day or two. It will be my very first one. you have inspired me to do it. I hope all goes well as I might add it to my list of skills if I can do it. The 12" woofers are mine.
I'm also a professional who use to recone for one of the oldest speaker repair shops in America. This is definitely one of the better videos on TH-cam. The passion is much appreciated. Did you guys use a signal wave generator to sweep your drivers with different frequencies to check for any anomolies? I didn't see that in the video.
With veneer lifting along a split like that you can just use a little PVA glue like you did , put a piece of paper over it and iron over it. It will set immediately and be ready for finishing work.
great vid , i will use you knowledge and technique to reform a vintage pair of JBL L-26 Decade two ways from 1975 . Wish me well , my wife has a turntable in the kitchen cupboard that she keep spices on , i will utilize that in my repair efforts .
The folks at JBL pro back in the day were first rate professionals. Our staff went there for training when we became JBL warranty in the early 80's. Before that we were fortunate to have a mentor that had worked with Western Electric, Altec, and JBL for decades. Hands on engineering knowledge cannot be replaced by software jockeys and those that think hot glue is mechanical engineering
I didn't go to JBL for certification, but I was trained by those in Los Angeles who did. That should have been fun. Lots of stories about JBL Northridge.
You have amazing patience (which I don't have) and take tremendous pride in your work and you, my friend, are the people who make this country great. Maybe when I get a little older and don't work 65 hours a week I can start doing these kind of things because I've always enjoyed audio systems and working on them. I have just acquired a pair of Techincs SB-2820 speakers in perfect condition but need tweeters replaced. Old ones were blown and removed and I don't have the originals. If you know a good inexpensive tweeter for those speakers, please recommend something. Great video! Thanks.
I'm just getting time to reply to some of you speaker guys because the government has shut down my business like turning off a switch. We might not survive this Economic takedown. Repairing speakers has always been a hard way to make a living. But now the Corporate Bankers have decided to wipe out the few remaining family owned and operated businesses in the USA. Send us some work or your thoughts on this final Government/corporate takedown of the American Family texasound@gmail.com Rock On
@@texasound1 I'm also a professional who use to work for one of the oldest Speaker repair shops in America. I've seen all sorts of stuff from around the world hit my repair desk back then. Yes, a lot of the competition has folded. Why did the government shut you down?
Thanks shooting on the fly. No script or plan. just turn on the cam and go at it. Need help Work and Support from the speaker community . Send Lawyers,Guns and Money!
I subscribed. Your very passionate about speakers. Thank you for showing the art of restoration. I have a question, what is the most unique speaker driver you ever repaired? Just curious. Thanks again!
Hi, I have a pair of used JBL Northridge E100s. Paired with a Concept 16.5, they sound good to me. While trying to solve an unbalanced sound issue, I discovered that there is no polywool or sponge inside. Further, in one of the midrange enclosures there is some foam leather stuffed inside while the other enclosure was empty. If I refoam the cabinet including the midrange enclosure, will the sound quality improve? If yes, which material should I use? Lastly, where can I get a couple of pictures or videos showing the steps and how should the end product look like?
Great video and such attention to detail, explaining the how and why's. I've got a Paragon that's been in the family brand new since the early 70's and we've had so many hours of enjoyment and great memories. I believe the LE15A's need rebuilding and it would be my first attempt but I noticed you said maybe to practice on something else first. Do you think this is something I can handle, I mean, after watching your video I'm thinking that I should leave it to a skilled professional such as yourself. Are you still doing this ? And, how important is it to go through the crossovers because I recently de-oxed the contacts on the McIntosh components and what a difference! System sounds so good again. So I'm really trying to tune up the whole system and want to do it right as it's been in the family for 50 years and hope to get 50 more. Any input would be so appreciated as I really have no one to confer with about this tune up.
I have a pair of these L65's and one of the speakers woofer foam has rotted. They were re coned by JBL a few years ago, Do you happen to know cause of rot on these. It has hardly been twenty years, and the other speaker is perfect. Great video by the way.
I am involved in this very same procedure with 8 - JBL LE14A's and 8 LE10A's. Where the JBL LE10A's have inverted dust caps present somewhat of a challenge. Where I am curious is: Adding glue and new surrounds, will that change the thiele and small parameters on the speakers? I am building my own cabinets in this situation, so I will obtain new thiele and smalls when I finish up the re-foam. Looking to tune the cabinets at around 32hz at around 4ft3. So each bass cabinet will be around 16ft3 and the LE10's are going to be my mid-bass drivers. Then I have other plans for the top ends. Been at this sound thing (professionally) since 1976 and love it as much now as I did then and perhaps more, but am pretty much retired and have never claimed to be a speaker tech, but I have did a few successfully and am enjoying my semi-retirement as I can work on a lot of my own "audiophile" ideas. I am also a long time electronics tech/engineer. Thank you for this video it is the most professional approach that I have seen on TH-cam.
Hi Tom, Ok let;s unpack this as the talking heads say. Dust caps to lay flat inverted they have to be the correct radius, but they do not have to be inverted, it won't have much of an effect on performance. Unless your software is pretty sophisticated, don't let it override your ears. Use your ears not your eyes. Look at the JBL box sizes, tunings. Unless you use a crazy amount of glue or the wrong type that should not be a problem. I think I have cover most of the issues in my vids. Good Luck, Rock On
Great video man. If my 122A is rubbing just slightly on the voice coil, could redoing the suspension like this take care of the problem? Or would it need totally re-coned? Just a hair off center and I can't stand it. Or is there a way to adjust the magnet from the back? Thanks.
You need a steady hand for this. I started to get a shaky hand and was losing my fine motor skills. I thought I was finished. Turned out it was just the Vodka. Had to give it up. Now my hand is steady as a rock!
Nice job! I`m getting ready to re-foam a pr of original 126A`s & was wondering if you(or anyone else reading) can answer a question for me since your exp`d with 100`s, on my 126`s there is this... what appears to be factory hard cardboard material(like a 4pc gasket) still glued to metal frames where the outside edge of new foams will be glued to...what purpose does this 4 pc. cardboard gasket serve?, should I leave in place? or remove & glue new foam directly to metal frame?
I'm changing the caps on my L15's, the electrolytics are bulging a little bit and the bass on them isn't what i think they should be and they also both don't sound the same. However i couldn't find the original values in film capacitors so i'm going from a 14uf to 15uf and 28uf to 30uf
Yes DIY, Americans used to be self sufficient, Go for it my friend. I'm old school so I don't usually replace electrolytics with Film and Foil Caps. They sound different. In general caps are 5-10% tolerance. So 14 to 15 is what % change,28 to 30= even less. When you want to experiment changing xovers do one component at a time and compare it to the stock unit. Most of my peers are gone on to the other side or are out of business. I'll be joining them soon if I don't get some help from the speaker world. Send me some work or help build some kind of Speaker Guy site, or I'll see you guys on the other side. Until then I'll be in a van down by the river. Thanks to all for the positive comments!
Can you tell me what would be a good three way crossover for this setup.... Rockville RVW1500P8 3000w 15" Raw DJ Subwoofers 8 Ohm Subs 70 Oz Magnet . Goldwood Sound GM-85/8 Poly Mica 5" Midrange 120 Watt 8 ohm Replacement Mid 3 x 7.25" Horn Tweeter Speakers.Piezo.Replacement for Loudspeakers I was given the cabinets but all the speakers were blown so I decided to replace them with all new ones ....the crossover may or may not be ok should I trust it want blow my new speakers?
Awesome speakers, I hope to own a set someday, but In the mean time I have my L36s. I had to reform my woofers as well and I cut off the dust cap very carefully and used shims, It was my first time and they came out perfect thankfully. My JBL L36s have real wood veneer and I think they are dried out and need treatment, I can feel these fine cracks when I slide my hand over them. I’m hoping you know what I should use to treat the wood/refinish it or whatever you would call it??? They are in absolutely perfect condition and still look new and I want to keep it that way. I really love how they look and sound with my marantz 2238 and realistic lab 420. What do you recommend I do? Did JBL use a special product or recommend anything back when these speakers came out? Sorry for rambling on there for a bit and thank you for any help you can give me on this problem.
Use Howard's restore-a-finish and 0000 Steele wool. Follow up with Howard's feed n' wax. The veneer will soak it right up. It'll even clean up any fine scratches.
Hello, I see perfect job with JBL speaker. Could You give info where I can buy yello polipropylen capacitor MPT and PMT 100V for crossover JBL Array 1400?
17:04 That was my dad to but in his words......If you don't know what the fuck you're doing? You shouldn't be fucking doing it. 👏 Thanks Mr. Texasound.
Somebody who used to work at the JBL factory told me they actually called the foam 'suspension' the 'compliance'. This implies it is more than just a ring of foam and its quality plays a very important role in the behaviour of the driver.
Yes sir that's basically true. Compliance is the reciprocal of stiffness, and it is very important to the performance of the speaker. This is something most of the sellers of DIY kits know nothing about. Even more important with Acoustic Suspension designs.
I used to wonder, having played shows there, why anybody would want to live in Amarillo. Now I feel the same way about Austin. We are being invaded by Cali-Commies.
Really nice work and you nailed the importance of all the details correct so should be easy for others to understand.
Wow! someone who actually knows how to repair a speaker correctly. Kudos my friend.
New to this channel... I rebuild, do complete restorations to vintage electronics... but have great reservation with speaker work... the skill of electro-mechanical fitment... I immensely appreciate what you do... Thank you for sharing your skill, knowledge and experience.
I have a pristine pair of L36 that I am rebuilding (replacing damaged pots and adding film caps) you have me now re-thinking about (against changing out) the inductors... your voice of experience rules.
That looks like a new woofer...
I'm known to be particular. I'd hire this guy in a second. Love his attention to detail.
I've done a number of re-foams including a couple without shimming. I got away with it but I agree it's not worth the risk. Next time I'll be pulling the dust caps and using shims. I've re-foamed a pair of LE14 woofers before and that was by far the most tedious I've done so far. JBL's glue is no joke when it's 40 years old. This video shows first class craftsmanship.
On my way to be doing a refoaming repair myself for the very first time, I am really happy with finding this video.
I love my old JBL Decade 36's (L36). They give me just the right sound in my studio, so I'll go all the way keeping them running for the next one or two decades :-)
I love the way You take the time to get everything cleaned up, all the details right etc to get the best result possible. I really appreciate that..
And the detail in keeping / reusing the dust cap is such a nice touch...
Thank You so much for doing this video.
All my best wishes to You and Yours. Stay safe...
Thanks and Good Luck
Beautiful workmanship and skill. Thank you sir.
55people Listen with Bluetooth speakers.
Thanks for this Video Mr.
Great craftsmanship
It's nice to see things done correctly these days...
Nice speakers, and skilled and talented man.
Really interesting film and fantastic craftsmanship.
Hi Guys, this is the best way to do recone , this men is just great *****
Fantastic tutorial. I followed every step as thouroughly as I could and the result is just perfect. Thank you so much indeed!
I may have to refoam a pair of JBL 240ti soon. They look even more frightening than the jubals. Any advice would be more than welcome. Thanks again.
That's great, I'm glad our video's helped. We are being driven out of business by the corporate government takeover of the economy. Any suggestions on how we can continue to do our life's work and pay the rent?
Glad I watched your video your passion and expertise is welcomed and greatly appreciated
Great info. I reconed an 8" Velodyne sub speaker without cutting the dust cap, Guess I lucked out.
Nice. I am going to do a cerwin vega 12' in a day or two. It will be my very first one. you have inspired me to do it. I hope all goes well as I might add it to my list of skills if I can do it. The 12" woofers are mine.
This is a great tutorial for people wanting to try it them selves. Thanks Texasound !
I'm also a professional who use to recone for one of the oldest speaker repair shops in America. This is definitely one of the better videos on TH-cam. The passion is much appreciated. Did you guys use a signal wave generator to sweep your drivers with different frequencies to check for any anomolies? I didn't see that in the video.
Not needed, either it rubs or not. Thats the anomalie. A simple 60Hz tone is fine.
With veneer lifting along a split like that you can just use a little PVA glue like you did , put a piece of paper over it and iron over it. It will set immediately and be ready for finishing work.
great vid , i will use you knowledge and technique to reform a vintage pair of JBL L-26 Decade two ways from 1975 . Wish me well , my wife has a turntable in the kitchen cupboard that she keep spices on , i will utilize that in my repair efforts .
R.I.P. Teresa Duran .. lovingly taught JBL transducer repairs at the Northridge facility.
The folks at JBL pro back in the day were first rate professionals. Our staff went there for training when we became JBL warranty in the early 80's. Before that we were fortunate to have a mentor that had worked with Western Electric, Altec, and JBL for decades. Hands on engineering knowledge cannot be replaced by software jockeys and those that think hot glue is mechanical engineering
I didn't go to JBL for certification, but I was trained by those in Los Angeles who did. That should have been fun. Lots of stories about JBL Northridge.
You have amazing patience (which I don't have) and take tremendous pride in your work and you, my friend, are the people who make this country great. Maybe when I get a little older and don't work 65 hours a week I can start doing these kind of things because I've always enjoyed audio systems and working on them. I have just acquired a pair of Techincs SB-2820 speakers in perfect condition but need tweeters replaced. Old ones were blown and removed and I don't have the originals. If you know a good inexpensive tweeter for those speakers, please recommend something. Great video! Thanks.
I'm just getting time to reply to some of you speaker guys because the government has shut down my business like turning off a switch. We might not survive this Economic takedown. Repairing speakers has always been a hard way to make a living. But now the Corporate Bankers have decided to wipe out the few remaining family owned and operated businesses in the USA. Send us some work or your thoughts on this final Government/corporate takedown of the American Family texasound@gmail.com Rock On
@@texasound1 I'm also a professional who use to work for one of the oldest Speaker repair shops in America. I've seen all sorts of stuff from around the world hit my repair desk back then. Yes, a lot of the competition has folded. Why did the government shut you down?
@@TheJTcreate We are not shut down and still operating. Our contact information is in every video description.
@@texasound1 Oh good to know. I don't like seeing the gov shut small businesses down.
Excellent job, you are the pro's pro ! and even more important is the way you jnstructed your video. Thank you
Thanks shooting on the fly. No script or plan. just turn on the cam and go at it. Need help Work and Support from the speaker community . Send Lawyers,Guns and Money!
Nicely done, sir
This man is a pro!!!❤
Great quality work
Really enjoy your videos. Very helpful. Did you build your repair turntable?
Awesome video, thanks for sharing...
Nice Video excelent Advise about the Caps , question for you the material used to fill up the Cabinet is fiberglass ?
i like this man perfect job
Very interesting ! I have understood that if I have to change that stuff, I will make the job by someone who knows. Thanks !
There's not many of us left, We are a dying breed. Current consumer electronics made in China, are disposable.
Good job man
Very nice work, thank you!
great job and very detailed !! thank you
really enjoyed this thanks.
Fantastic vid! I have the the Decade L36's. What resource would you recommend for the correct quality replacement foam? Thx
I really enjoyed this thanks for sharing you really know your stuff🔊🔊🔊👍👍💯💯
I subscribed. Your very passionate about speakers. Thank you for showing the art of restoration. I have a question, what is the most unique speaker driver you ever repaired? Just curious. Thanks again!
great job
Hi, I have a pair of used JBL Northridge E100s. Paired with a Concept 16.5, they sound good to me. While trying to solve an unbalanced sound issue, I discovered that there is no polywool or sponge inside. Further, in one of the midrange enclosures there is some foam leather stuffed inside while the other enclosure was empty. If I refoam the cabinet including the midrange enclosure, will the sound quality improve? If yes, which material should I use? Lastly, where can I get a couple of pictures or videos showing the steps and how should the end product look like?
Great video and such attention to detail, explaining the how and why's. I've got a Paragon that's been in the family brand new since the early 70's and we've had so many hours of enjoyment and great memories. I believe the LE15A's need rebuilding and it would be my first attempt but I noticed you said maybe to practice on something else first. Do you think this is something I can handle, I mean, after watching your video I'm thinking that I should leave it to a skilled professional such as yourself. Are you still doing this ? And, how important is it to go through the crossovers because I recently de-oxed the contacts on the McIntosh components and what a difference! System sounds so good again. So I'm really trying to tune up the whole system and want to do it right as it's been in the family for 50 years and hope to get 50 more. Any input would be so appreciated as I really have no one to confer with about this tune up.
Best job in the world😊
I have a pair of these L65's and one of the speakers woofer foam has rotted. They were re coned by JBL a few years ago, Do you happen to know cause of rot on these. It has hardly been twenty years, and the other speaker is perfect. Great video by the way.
keep it up sir thanks for sharing the video tnx
good job
I am involved in this very same procedure with 8 - JBL LE14A's and 8 LE10A's. Where the JBL LE10A's have inverted dust caps present somewhat of a challenge. Where I am curious is: Adding glue and new surrounds, will that change the thiele and small parameters on the speakers? I am building my own cabinets in this situation, so I will obtain new thiele and smalls when I finish up the re-foam. Looking to tune the cabinets at around 32hz at around 4ft3. So each bass cabinet will be around 16ft3 and the LE10's are going to be my mid-bass drivers. Then I have other plans for the top ends. Been at this sound thing (professionally) since 1976 and love it as much now as I did then and perhaps more, but am pretty much retired and have never claimed to be a speaker tech, but I have did a few successfully and am enjoying my semi-retirement as I can work on a lot of my own "audiophile" ideas. I am also a long time electronics tech/engineer. Thank you for this video it is the most professional approach that I have seen on TH-cam.
Hi Tom, Ok let;s unpack this as the talking heads say. Dust caps to lay flat inverted they have to be the correct radius, but they do not have to be inverted, it won't have much of an effect on performance. Unless your software is pretty sophisticated, don't let it override your ears. Use your ears not your eyes. Look at the JBL box sizes, tunings. Unless you use a crazy amount of glue or the wrong type that should not be a problem. I think I have cover most of the issues in my vids. Good Luck, Rock On
Great video man. If my 122A is rubbing just slightly on the voice coil, could redoing the suspension like this take care of the problem? Or would it need totally re-coned? Just a hair off center and I can't stand it. Or is there a way to adjust the magnet from the back? Thanks.
That depends on different factors. The foam edge is just one of two suspension systems that the coil/cone assembly rely on for alignment.
You remind me of a olde school farmer well done good job :D . Cup tea? and a hobnob?
You need a steady hand for this. I started to get a shaky hand and was losing my fine motor skills. I thought I was finished. Turned out it was just the Vodka. Had to give it up. Now my hand is steady as a rock!
Was that a pair of American Acoustics Labs speakers (studio series circa 1978) I spotted in the beginning of the video?
Hi I realize is going back a ways but I'm wondering what you would charge to do a foam replacement on those JBL Woofers?
Nice job! I`m getting ready to re-foam a pr of original 126A`s & was wondering if you(or anyone else reading) can answer a question for me since your exp`d with 100`s,
on my 126`s there is this... what appears to be factory hard cardboard material(like a 4pc gasket) still glued to metal frames where the outside edge of new foams will be glued to...what purpose does this 4 pc. cardboard gasket serve?, should I leave in place? or remove & glue new foam directly to metal frame?
I'm changing the caps on my L15's, the electrolytics are bulging a little bit and the bass on them isn't what i think they should be and they also both don't sound the same. However i couldn't find the original values in film capacitors so i'm going from a 14uf to 15uf and 28uf to 30uf
Yes DIY, Americans used to be self sufficient, Go for it my friend. I'm old school so I don't usually replace electrolytics with Film and Foil Caps. They sound different. In general caps are 5-10% tolerance. So 14 to 15 is what % change,28 to 30= even less. When you want to experiment changing xovers do one component at a time and compare it to the stock unit. Most of my peers are gone on to the other side or are out of business. I'll be joining them soon if I don't get some help from the speaker world. Send me some work or help build some kind of Speaker Guy site, or I'll see you guys on the other side. Until then I'll be in a van down by the river. Thanks to all for the positive comments!
On that model what did the green wire go to on the woofer? Red or black?
Can you tell me what would be a good three way crossover for this setup....
Rockville RVW1500P8 3000w 15" Raw DJ Subwoofers 8 Ohm Subs 70 Oz Magnet
.
Goldwood Sound GM-85/8 Poly Mica 5" Midrange 120 Watt 8 ohm Replacement Mid
3 x 7.25" Horn Tweeter Speakers.Piezo.Replacement for Loudspeakers
I was given the cabinets but all the speakers were blown so I decided to replace them with all new ones ....the crossover may or may not be ok should I trust it want blow my new speakers?
when my family went to the good will I found a pair of Magnavox S-8762 Air suspension.
Awesome speakers, I hope to own a set someday, but In the mean time I have my L36s. I had to reform my woofers as well and I cut off the dust cap very carefully and used shims, It was my first time and they came out perfect thankfully. My JBL L36s have real wood veneer and I think they are dried out and need treatment, I can feel these fine cracks when I slide my hand over them. I’m hoping you know what I should use to treat the wood/refinish it or whatever you would call it??? They are in absolutely perfect condition and still look new and I want to keep it that way. I really love how they look and sound with my marantz 2238 and realistic lab 420. What do you recommend I do? Did JBL use a special product or recommend anything back when these speakers came out?
Sorry for rambling on there for a bit and thank you for any help you can give me on this problem.
Use Howard's restore-a-finish and 0000 Steele wool. Follow up with Howard's feed n' wax. The veneer will soak it right up. It'll even clean up any fine scratches.
Try Mayonnaise on the cabs
Hello, I see perfect job with JBL speaker. Could You give info where I can buy yello polipropylen capacitor MPT and PMT 100V for crossover JBL Array 1400?
She's so pretty
17:04 That was my dad to but in his words......If you don't know what the fuck you're doing? You shouldn't be fucking doing it. 👏 Thanks Mr. Texasound.
Hello I live in México City. Can you restore my woofers from my L65?
can you provide the information on the replacement electrolytic capacitors you used for replacement?
Parts Express
I have used re-foam kits that don't require shimming, but I do anyway, I never trust doing it with out shimming.
💛👍👍👍
If one wanted to send you a pair of L86s to have them repaired, if that possible?
email texasound@gmail.com
Somebody who used to work at the JBL factory told me they actually called the foam 'suspension' the 'compliance'. This implies it is more than just a ring of foam and its quality plays a very important role in the behaviour of the driver.
Yes sir that's basically true. Compliance is the reciprocal of stiffness, and it is very important to the performance of the speaker. This is something most of the sellers of DIY kits know nothing about. Even more important with Acoustic Suspension designs.
Texasound where would you suggest I get foam surrounds for my Advent heritage speakers? Floor speakers with dual 8's
Next time your in roundtop have a doughnut for me
Amarillo
I used to wonder, having played shows there, why anybody would want to live in Amarillo. Now I feel the same way about Austin. We are being invaded by Cali-Commies.
Ôk 👍
Профи класс !!!
ты понимал что он говорил?
Don't unterstand not replace the old elkos with 160 or 250 Volt mkts!! No money.
So.so
Há