Refoaming JBL Control 1 Speakers
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- Опубликовано: 7 сен 2024
- I'm replacing the broken foam speaker surround on my beloved JBL Control 1 speakers. I'm attempting this for the first time so please don't consider this a tutorial, just sharing my experience here.
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Hey, we just love repair. does not have to be commodore.
Very helpful as I have 13 speakers out of my car to do and wasn't sure how to do it.
I have to repair them as the car is odd and is an 8 ohm system and most vehicle speakers are 4 ohm.
Love your videos have learned a lot from them, keep up the great work.
I have a pair of jbl book shelf speakers with the same problem. I have been thinking about doing this too, but i wasn't too sure about how to go about it. Thanks for this video. Awesome!
Relaxed informative video. Will use some of your tips to refoam Visonik David's. Thanks for posting.
The pushed in middle cones/domes you solve carefully with a vacum cleaner. Old trick I learned from my childhood friends father.
Just be very careful: put the tube against the dusp cap while the vacuum is turned off, turn on the vacuum for a bit, then turn it off, then remove the tube. Otherwise one can rip the cone out of the speaker...
I had a dent in a dust cap that just kept popping back in after being pulled out so I got mad and just pushed the whole thing in, which looks better than it being dented.
I had no idea such foam kits existed. That's cool.
Definitely be careful with the cone, scarring will affect the frequency response. That said, paper cones are much tougher than the thin plastic membranes we find in most kit nowadays.
Great video! It's good to see these things repaired and not thrown away.
hey Jan, did this on an old pair on Realistic Mach 2 speakers. Yes the glue is nothing more than PVA. one thing i did differently was cut the dust caps, put shims in between the coil and the outer part of the magnet (my kit came with them) then glued the foam to the speaker (they are cardboard) then glued the foam to the basket. i used paper clips to hold the foam to the basket all around it (they were 15" so imagine all those friggin clips. and they came out awesome. oh, the replacement dust caps just glue on top of the original ones (you leave 'flaps' on the old one when you cut them out) so you have something to glue to. awesome work as always bud
I've re-foamed a few speakers and it doesn't matter if you glue it to the bottom or the top. I've done it both ways and I think it is just a matter of which you prefer aesthetically.
Man, that was a lot more work than I thought there would be. A nice change of pace. I enjoyed this repair. 👍
Many times I heard those speakers in bars and restaurants and their sound always was deep, accurate & the high frequencies were very bright. If I had to pick a pair I'd go for those.
I'm surprised they don't include a double sided tape layer for the foam to frame seal, that's definitely a cost saving measure. Using adhesive for the cone to foam seal makes sense though.
You may be able to use a straw (or little rubber hosing) and mouth suction to pop those dents out of the speaker cone centers.
Excellent save. Nice to bring something worthwhile back to life. Come to think of it, that's what it is all about! Silly me. Cheers
Nice attempt! I was wondering before how this was done, thanks!
Nice job. I typically use contact cement when replacing surround foam.
A whopping new kind of HiFi-System: upper levels for sound, lower level for making microwave popcorn ;)
To get the dents out of the dust caps, I use a little bit of sticky tape and press it on the dent gently with my finger nail, then pull it away to pop it out.
500th like! I refoamed a pair of JBL Control 1Gs a few years ago but I have no use for them.
What really impresses me is the results of refoaming bigger and older speakers - I have a pair of 1980 Bose 501s (2 cu ft sealed enclosures) running the 1972 model 10" woofers refoamed in 2017-18, and though I usually use them as "tops" in my 3-way active setup, if I turn off my bass equipment and disable all high-pass filters it's amazing how much bass comes out of 48 year old woofers in 40 year old enclosures, even at 20 watts RMS per channel!
The dust caps can be "repaired" with some careful sucking from a vacuum cleaner.
Or by pulling with gaffer's tape :)
@@katho8472 It can peel off the top layer and make it nasty. Fine for plastic dust caps, but no-no for paper ones. But the vacuum cleaner method works universally, just be careful not to rip the cone out of the speaker :) .
Jan, those foam rings are known as the Cone surround. You are correct that you want to replace them with the same kind as were originally used, because they are partially responsible for establishing the free air resonance frequency of the speaker. If you used a different material (rubber, or a fabric based surround) it might last longer than the foam ones, but it would definitely change the resonance of the speaker. The plastic tube which is extending inward from the front panel, is a tuned port which is a specific diameter and length, which cancels out that resonance of the woofer.
It looks like you have done a great job at replacing those surrounds.
I've built speakers from scratch, and have built speaker crossovers, and made the tuned ports. It isn't too difficult if you have all the appropriate information, but in this case it wasn't available, nor necessary.
"Microwave oven fits the hi-fi stack perfectly" Oh god if Techmoan sees this...
Microwave ovens produce quite a lot of heat, that radiates out the top, which isn't ideal for stacking hifi on top. Worth keeping in mind.
Hot beats, served fresh!
Big Clive would love this...
@@spokehedz and hot beets!
.... AND they have a turntable 🤣 👍
Done myself last year on my Infinity speakers, consume lot of time to do that, but now they sound like new.
BTW Jan, hex file for switchless kernel works, thanks once more. :)
thanks for making the video - I have a pair of really old JBL speakers where the foam has just failed
Ordered spares today, your video has helped a lot
Jan, die dustcap dellen bekommst du im grunde recht einfach raus. Man nehme einen starken staubsauger, entfernt den einsatz vorne am schlauch, stellt erstmal halbe stärke am staubsauger ein und hält den schlauch dran. Durch den unterdruck fluppt die dustcap wieder raus. So habe ich die dellen bei nem Jamo lautsprecher ohne probleme wieder rausbekommen. Bei den dellen die du hast, sollte das nahezu rückstandfrei wieder herstellbar sein :)
Tengo unas Control 52 y la suspensión se desintegro en menos de 10 años y quedaron en desuso. Tu video me inspira a repararlas pero solo consigo
nuevamente de foam y quería unas de goma.
Technics SA-GX130 ?
Gracias por el video!!!
I have Control 52s and the suspension disintegrated in less than 10 years and they fell into disuse. Your video inspires me to repair them but I can only
Foam again and I wanted rubber ones.
Technics SA-GX130 ?
Thanks for the video!!!
I got my Boston Acoustics HD5 bookshelf speakers for fifty cents for the pair at a yard sale with bad woofers. I refoamed them and they sound great; they are extremely transparent and have surprising bass response for their size, especially when you consider they are sealed.
My college uses these. I wish they would replace all of those. They sound good, but they rattle due to the foam surrounds being rotten due to age.
you opened my eye's
I had no idea these repair kits were available
I just ordered a set and will revisit your video as soon as I get them
thanks for the video
Hope you manage to fix your speakers! I found it surprisingly easy (plus, the speakers from this video still work absolutely fine today). :)
spare foams finally arrived from Netherlands along with some "special" glue (I think it's neoprene glue)
took the speakers apart and proceeded as you did
the most tedious part was removing the old brittle foam and glue from the cones
reassembly and the speakers work (and look) like new again
thanks again for the informative video
Great video, somthing different then computers, but HIFI is very interesting too.
The round dust cone that is dented kan be fixed with a small thin needle i think. Just stick the needle in a small and bend it out.
I've popped the dents out of dust caps in the past using a very sharp needle. Thinner the better and kind of snagging it and pulling out the dent. One of those can't see the repair so good enough.
If you are in a hurry, and you want to know about when the glue is dried, you can make a glue coupon, or a "gluepon" which is just a bit of the glue smeared on a similar surface so you can track the progress of it curing/drying. Saves on accidentally moving a not-quite-set glue and ruining hard work... You can also just leave it for hours and hours, but sometimes time is of the essance.
does it solve cracking sound on the speaker?
Great to see you are re-using the hummus box! Cheers from Israel ;)
A hairdryer on these works a treat..softens the glue makes it easy...
Oh, good point, didn't think of that.
@@JanBeta haha stored in the memory banks for next time...stay safe sir
@@JanBeta I used to soak the glued joints with nitro thinner. It dissolves it very well. But I don't suggest it with these shiny impregnated cones, as it probably will dissolve the coating as well. For regular paper cone speakers, it worked me the best, especially to remove dust caps without damaging the cone. Some speakers are glued together with such glue that is insensitive to heat.
Great speakers. Wish these had rubber surrounds instead of foam so they last longer.
As far as I know there are still replacement surrounds made of rubber available but they are obviously going to change the acoustic properties of the speakers quite a bit.
I actually love your Hi-Fi stuff.
Not to be harsh, but almost everything in this video is a perfect example of “what not to do” when reconing a speaker. I use to recone for a company that has been around since the 1930s. Quite a few people would watch these videos, think the process is easy, then screw up their speakers because of the little important details they didn’t know about and then bring it to us for repair costing more $$$ than if we did the “re-edge.” It cool if you want to do your own re-edge but consult an expert first so you don’t Miss important details and you don’t
Make bad mistakes, especially if you are going to do your own video on RUclips. Do your research first. Improper edge securing will create bad audio replication. Improper alignment can lead to the coil smacking the magnet during high volumes which doesn’t just distort the audio but can eventually lead to a short that damages the amp. The coil wire has a baked on insulator to prevent shorting. If the coil rubs the magnet, especially under high power, the coating will get rubbed off the coil wire causing electricity to short through the windings, and shorting back to the amp. Sometimes the slightest misalignment won’t be an issue until you turn up the volume and the coil starts to
Wobble in the gap, which is when contact of the magnet is made.
No problems with mine so far. Would be great if you could share the secret trick for aligning correctly. Obviously the method shown is the dirty "DIY" approach but it seems to work fine for many people, so not sure what the issue is, especially for non-high end speakers?
I had to recone my Control 5 speakers last year, also more than 20 years old too!
Next time use toluene to remove adhesive it will make the job a little easier!
I'm doing the same job on my own JBL Control 1 speakers. Mine have a foam insert inside, which you noted an absence of in yours on 9m 00s. I reckon you can put some foam in there if you wish,
Using heat first (hair dryer or hot air station) to make the glue fluid again.. Then WD40 for the rest of it and at the end, use IPA to remove WD40 again and clean it up...
Hi, nice video... who doesnt appreciate good speakers back to life... the center cone can be rounded back with a powerfull hoover.. stick it on and it will pop back to round again
I tried that on these and it didn't really work. Also tried the sticky tape trick. But I'm not too concerned because it's just a cosmetic issue really.
I used 4 hours pr midrange speaker just to clean them up, my speakers has 4 midrange drivers in each tower, took bout 10 mins to glue them and 1 night to harden up :)
I wonder, when applying the glue to the inner-part of the foam (the part that attaches to the cone), if it would have been easier to maybe put 4 or 5 dabs down, then spun the foam around to evenly spread the glue? Just a thought for next time, or if someone else wants to try it...
Hmm, nice idea, going to try that!
Nice video, didn't even know that this foam-repair is possible.
But imho a kitchen (with all that cooking-steam and directly near/above a microwave) is the second worst place to put HiFi-equipment and especially such speakers with no protection-cover. Right after the bathroom. 😁
I recently repaired the cardboard speakers in my old (30 y) peugeot 205. The glue had dried so much the membranes were free from the frame.
glues are generally dissolved by oils. you can avoid using strong solvents by using vegetable oil in many cases. if it's stubborn or you just want to rip through it, Ethanol works *much* better than isopropyl alcohol for dissolving glue. if you can't find ethanol in the drug stores there, you can just get a small bottle of everclear or other pure grain alcohol. you will be shocked at how easily grain alcohol strips off goo.
The dust caps can actually easily popped back with a vacuum cleaner, some tape or a very small needle.
Can you send a link to buy the kit membranes please ? I see only a guy on eBay who sell this!
Hello Jan ! Could you tell me what kind of glue do you use ? Usually i take neoprene but yours seems easier to work. Thanks a lot for your nice video ! Jack
That looked like pva woodglue
What is the brand name of the glue?
This is great i have been thinking about it for a while
JBL Control 1 are awesome speakers for there size and price, I lost count how many of them I sold when I worked at Thomann.
Everybody needs a Microvave in his Audio Tower :D
Same thing happened with my pair, thanks for the advise
I didn't know replacement of the foam on a speaker was a thing. Threw out a pair of old speakers once because the foam had crumbled up. Now I know it can be fixed.
A mistake many have made unfortunately. Its an easy fix
Gotto love them tiny flats... Microwave as a shelf for hifi :)
A swiss army knife that has a screwdriver..... that reminds me of something..... I totaly don't care for speakers but I like Jan's video's, even if the subject is not my thing :-)
Where did you get the spare parts from? I’m assuming these are passive speakers.
Checking JBL specs yes they are passive.
As I said in the video, I just searched eBay for a Refoaming kit. I think the one I ended up buying came from a Polish seller.
Very useful, thank you…
Thanks for this video. I was wondering do they still work today? Just curious 🤷🏻♂️
Yup, they are still working fine and are more or less in daily use. :)
@@JanBeta ok cool so it really worked. I was thinking it maybe was just for short period. Last Saturday I found a pair of these in a second hand shop for just 10 euro. When I connected them to my stereo at first it sound good but the day after when I turned on the volume higher the foam was completely damaged making this prrr prrr noise 😅. Then I found this video, ordered some new foam rings. Yesterday evening they arrived, watched this video again and just tried it. Still drying now i wanted to wait for 24 Hours before I put them together and reconnect them. Will know tonight if it worked. But I only did just one to see how much work it really is. If its all good i'll change the foam on the other speaker too. If not I just buy 2 new woofers but last time I checked Yesterday it looks good so 🤞🏻🤞🏻🤞🏻 fingersss crossed. I know this ain't a real "tutorial" but it sure helped me a lot so thanks man 🙏🏻
Btw, where did you buy replacement foams for speakers?
Need more audio fix videos Jan! Good stuff.
Been turning the bass up to high there Jan ? Although if memory serves, some of these do suffer from foam rot.
I have a nice pair of Tannoy Mercury M20 speakers here that need new tweeters.. must get around to fixing those as im sure they sound awesome.. although they're probably too "big" for my little flat!
great speakers. the repair is well-deserved.
Yes, I like them a lot. Pretty neutral and versatile sounding speakers. :)
I have the JBL Control 1s that I bought either in the late 1980s or early 1990s. (I don't remember)...The same thing happened to the foam. The problem is that my Control Ones won't come apart after taking the screws out. They are basically stuck together and I don't want to get too aggressive trying to pry them apart. Did yours come apart easily?
I have to take another look as they have been sitting in my studio unused for years, but I would love to repair them if I can get them apart. I also had bought the sub-woofer that were matched with the Control Ones. I still have that also plus I did buy the wall mount brackets for them as well. Nice video...
Philip
NYC Area
Hey Philip! I had to use some force on mine as well, the front and back are glued together with some kind of elastic glue (I suppose to make them even more air tight around the edges). You probably just have to carefully apply some pressure, too. Hope your repair goes well! :)
@@JanBeta OK...Thanks for the info. I wonder if replacement speakers are also available in case I wanted to just avoid doing the foam repair. I must confess however you made it look totally doable. Thanks.
Philip
It's important to have both dust covers dented so the speakers match!
I notice how quickly you move from the "kit" to a normal sized screw driver =)
Good video bud, I completely approve of you trying to make a buck or 2 selling iFixit kits, but honestly they are no more useful than any other kit available EVERYwhere.
He used the bit from the kit still, just put it into a beefier handle.
Jan, nice to know you. Can you post the url of FOAM Kit, please?. Thanks!
Hi, the link does no longer exist. I searched for it on ebay, you can probably find it easily if you do the same!
Hey Jan, thanks for the video.
Where did you buy the replacement foams for speakers?
Also which are the sizes you bought ? I bought some 4, 4.5 and 5 inches ....none fits exactly in.
Found them on eBay searching for JBL Control 1 spare parts (they were labelled as such). I'm not sure about the correct measurements, I'm sorry.
Hello. I am writing to you from Greece. Do you know where I can buy this sponge
Hi Jan. Thanks for the video! I'm wondering what you're using the Focusrite for. Where is it connected to?
Oh, it’s connected to my main PC and the Behringer active speakers on my desk. I use it for all kinds of recordings.
Hi Jan, is Focus 10 a friend of yours? Nice tracks!
Have a stupid question : Did the control 1 pro components fit the legacy control 1?
I haven't taken apart a pro model yet but at least the speaker size is the same. Most likely the rest is going to fit, too.
@@JanBeta I'm not sure about this, In the specs it said pro is 6.5" and control 1 It's 5". But I didn't see any speaker from inside
Isn't it mighty interesting that this is exactly what I also need to do? On a set of Mission speakers, but same era.. Brilliant therefore!
You can use a hover on the dust cap.
This is a typical issue not only but above all especially with the JBL Control One active and passive speakers which occurs after about eight to ten years of use in most cases.
This part of a speaker is called "speaker surround" or in German "Sicke", these kits are called "Speaker Refoam Kits" or "Sicken Reparatur Kits".
You absolutely have to remove the old foam and glue completely, which works very well with nail polish remover (Nagellackentferner).
Anyone who is not technically skilled simply buys a completely new JBL woofer for the Control 1, for example from "thomann de" for around €34 each, but be careful, the normal woofer replacement kit is not suitable for the active Control One, because they don't have the right cable connections for that, I've had to experience it myself.
Good video, I have those JBL control 1, not sure which model, they're active though, but they have that 50hz hum. Do you know what could be wrong with them?
50Hz hum usually points to an issue with filter capacitors. Maybe it’s worth a try to replace the electrolytic caps in the amplifier and power supply section. Another cause for hum could be a loose ground connection somewhere. I haven’t worked on the active version of these though so there might be other common failure points I don’t know about.
I'm really surprised that you did not use your signal generator to center the voice coil
Guys, where can I buy foam? Does anybody have some link? Please 🙏
Have one pair at home and need to replace one side so it could be helpful, I try to search but couldn't find it
www.ebay.de/itm/401823960053?mkcid=16&mkevt=1&mkrid=707-127634-2357-0&ssspo=jW969kdESaq&sssrc=2047675&ssuid=lA-WEmJlSHS&widget_ver=artemis&media=COPY
(German eBay though, but I'm pretty sure they'll ship internationally.)
It is definitely odd your set of C1's dont have any damping material inside. My C1's came with a small white 4 x 3 piece of fiber like material hung over the top of each woofer. Mine were purchased around 2007 FYI.
Got these 1980's-ish Philips speakers, with same kind of issue, foam just falling apart. I wonder if replacements are available for them... Rather annoying glued design, really hard to take anything apart without breaking them. This would be an interesting project, however.
You can get generic replacements in all kinds of sizes, definitely worth doing. :)
To be honest with something like these I would just replace the whole speaker unit rather than try to re-foam the edges. I can see it being worth while in something like a vintage guitar speaker that is long out of manufacture, but these things are so common and cheap it just doesn't seem worth it.
And why does it seem that there is always someone who goes around pushing in the dust cap of any and every speaker cone that doesn't have a metal grill in front of it?
I own 60+ years old radios with their speakers in pristine condition. What to think about speaker which desintegrates after couple of years?
Those have paper surrounds, undesirable for speakers with long travel cones. Rubber surrounds can last 40-50 years, cloth surrounds even longer. Foam surrounds break down the soonest, 15-30 years, the reasons why they use them:
- cheap
- planned obsolence
- main reason: actually it has the best acoustic properties. Paper, rubber and cloth surronds generate higher distortion with their movement.
Another interesting video !!! - Has anyone any tips for re-shaping what Jan called the 'dust cap'? I have some PC speakers and over the years the 'dust caps' have been swashed in and are not the nice dome shape they should be.
Vacuum cleaner or sticky tape works most of the times. :)
@@JanBeta Thanks Jan, will give the sticky tape a try.
Can you put rubber surround on control 1?
You can (and afaik, there are kits available for that, too), but it's going to change the acoustic properties of the speakers significantly. Different weight of the membrane, different response etc. Not a good idea in my opinion.
@@JanBeta i see. Thank you for the explanation
donde se consiguen esos reouestos?
where did u get the foam kit
I found it on eBay. I think there are several sellers on other platforms, too.
tried a fw and none fit perfectly.....going to try and shrink a set in hot water
Very nice👌👌
JBL ❤️😍🔥
Remember buying these ones exactly for $365 dollars after sales tax in Canada back in early 90s.
Awesome!😅
Suppousedly, you can use a vacuum to pop the dustcaps.
you can do that, you can also use the qtip/cotton bud and superglue method
33:15 first time in my life I see bananas prisoners.
They deserved it! Nasty buggers. ;)
How come you did not remove the dents from the center dust caps ?
It’s just a cosmetic thing. Tried removing the dents before and it didn’t work too well so I just left it like it is for now.
@@JanBeta Ah yes cosmetic indeed, we used to remove them with a needle or a pin.
Hey great, I have the same amplifier from Technics! Must be from around 1990... Only little trouble: The FM frequence shifts away from what the dial shows. So for 98.0MHz, it finds and locks in at 98.05MHz. Not a big issue, but do you have any idea to fix this? Whoops, next statement after unpausing was "Patreon episode"...
No, mine actually does the same. I think it’s misaligned from factory. Would be difficult to change.
@@JanBeta No, it develops over time. I bought the receiver new and realized that issue during the 2000s. Brought it to a service point and it got corrected. Now, min 15years later, it re-appeared. But thanks for the quick reply anyway! Keep up this great channel. Greets from Bremen!
Hm, might be a capacitor issue then. Recapping the radio receiver board might help. I didn’t replace any caps in mine (yet).
It probably needs an FM IF alignment.
32:03.. so it was a retro tec video after all.. :-) .. 21 years old speakers...
Can you get rack ears for that 19 inch microwave :D
Next time try WD40 , it removes all stains and glue residues :)
Depending on the lighter fluid he was using, it may be the same active ingredient (kerosene).