My older sister bought McIntosh stereo equipment in the late 60's. She gave that system to her son about 8 years ago. The surrounds were going bad in the speakers. He took them to an authorized McIntosh dealer in Denver. They restored the speakers to like-new condition at no cost. Turns out McIntosh guarantees their equipment for life. Good to know for those who own McIntosh

A very welcome video. I ordered a pair of kits to repair my AR-3a woofers months ago. I just need to get up the courage!

Just one tip Tony. If you can get hold of a lazy Suzan (turn table) you may find it very easy to apply the glue bead evenly. I refoam drivers a lot, then it makes work faster and smoother.

I tried this on a nice set of Infinity SS 2003s. It was extremely messy, picked rubber cement off my fingers for a week, was WAY more difficult than this, also was hot and humid during my hard work. After all that, despite the seller assuring me the speakers had been tested, I refoamed a dead woofer. Oh, and I broke a plastic gasket trying to get at the existing foam surround.

Great video as usual Tony! Seems to me the "levelness" of the work surface is important for this work too. Thanks for sharing your knowledge.

Great vid Tony! FWIW I use a AA sized battery to lift and center the voice coil of refoams. At 1.5 volts you don't have to worry about burning out the voice coil and it will keep it perfectly centered. Only needs to connected for a short amount of time and can be disconnected once the glue gets tacky. Works every time!

Right then! Going to grab my supper and a mug of tea and chill out to some xraytonyb!! I just know this is going to be good :) Thanks Tony!

4 methods I am aware of: 1) by feel, 2) shims, 3) signal generator, 4) AA battery accross the speaker terminals. I typically do the feel method unless the tolerances are very tight, then I employ the battery accross the terminals. The battery method is very useful for foams that bond to the rear of the cone. I use shims if the dust cover has been pushed in by little fingers already and will be replaced. Foams are easy to do and after your first repair you will have acqukred a new skill and will move onto replacing tweeter ferrofluid and redoing xovers, speaker jacks for banana plugs.

At 34:46 in the video, you picked up the trim ring and started to prepare it for gluing by removing the foam residue, but you did this with the dust cap OPEN and near to it, and you're going to make a mess of foam residue. You should have cleaned up the trim ring near the beginning, why not as soon as you removed it, but certainly before your bench clean-up and well before opening the dust cap. Otherwise this is an excellent carefully explained video.

A tip that has worked for me (weigh in if you see any disadvantages to this): Refoaming a set of speakers - Infinity Reference Threes I got for free with both a ~4.5" and 8" in each with no foam left at all.. One woofer had a tear between the cone and spider (accordion pleated bit in the back behind the cone), so I decided to experiment on this one first. Isopropyl alcohol worked to soften the adhesive and dozens of cotton swabs and a lot of gentle rubbing rendered the remains of the foam gasket and adhesive gone with no damage to the cone. Using craft knives to scrape the same from the basket removed a lot of paint as it clearly wasn't very precisely made and isn't actually flat. Because the cones appeared to be plastic, I used the same trick of rubbing isopropyl on the visible adhesive around the dust cap until it was gone, leaving some alcohol residue in the gap. Then I carefully used a craft knife to prod around the gap until I found a spot it went through and slowly pried the dust cap up. Unfortunately, on this first attempt I went too deep with the knife and cut the voice coil wires - those things are tiny, if you haven't seen them before. I was surprised to find they passed through the cone as high up as they did, rather than being attached to the top edge of the "cylinder" of the voice coil at the base of the cone. However, this approach led me to successfully remove the dust cap without cutting on the more intact speaker!

I can vouch for the Aleene's Quick Dry Tacky Glue. I researched it for 2 days and that's what was most recommended.

Hi as i have said before you are a man of many talents in my younger days I used to run a mobile disco and if a speaker went faulty i used to send them to a company called baker loudspeakers which offered a reckoning service

This looks like my AR-90's. similar design. Nice video. Need to do this same repair on my AR's. thanks for the tips!

I think they are Infinity drivers.And I use cotton balls to hold the cone up, away from the rim.

This was a great video and nicely presented. The only drawback for me would be the look of the glue. I wished there was a way to make it look neater so you could show off your speakers like we did when they were new.

Great video. Very informative and well paced. Thank you.

... the wheels are turning, but the hamster is dead. - classic!

I got the same cavalier king Charles, same colors. It's a really nice dog ❤

Thanks for this very interesting and well done video. This was extremely informative and the very best type of KZfaq that I like to see as I learned something new and most all your videos are presented in a very pleasant and well produced manner.

got a Kenwood 10 I'm about to do.. should be type 2.. lots of play, ordered the foam special, got 2 -just need 1 I hope..

Nice repair Tony! I've run into your channel from time to time and then saw this video. Two woofers, foam surrounds, well, I can safely rule out ADS as they used buttyl rubber for the surrounds, at least on some speakers anyway. I have a pair of L810 bookshelves myself, series 1 so 6 Ohm nominal @ 20-100W nominal. They are powered by a modest NAD 7240PE receiver for a dynamic and punchy sound. the ONLY thing I dislike about them is the spring clips but thankfully you can get good spring clip pins for your speaker cables these days.

Tony. this is your best video yet! Speaker impedance vs. frequency is seldom discussed. Thanks for this! Also, is there a particular advantage of 16-Ohm speakers vs 8-ohm?

The most important thing is confidence which I'm working up to.

Thanks for sharing this great video!

Bella sounds like my ex wife! LMAO!

also wiggling the speaker and grinding the voice coil is impossible to not do, all you can do is try and if it dont' work why then... strap c4 to it and blow it to smitherines and be happy that you won anyway

Was going to say Infinity Kappa 9's but I think they had more than four mounting screws and weren't paper cones.

Nice job and very interesting video, second method very interesting. These speakers are really impressive and I understand that you want to keep them on top. I've not seen the total measurements because you should need another video to make them (adding mass for Qfactors...). It's clearly difficult to see what can be made with these, as you can find different solutions, phasis controlled speakers Revox style, semi push pulls like Kef, or simpler associations like Canterbury with compression horn. I also remember Cabasse Etna or Stromboli bass enclosure with opposite coupling directions, Quad bass complements for their electrostatics ESL 63 and even some special high gain large range for tube electronics made for theatre in the 60's by JBL... Anyway, the program and solution you use can be found in many different makes, as far as you have a sound card, but is interesting as it seems the simplest and easiest way to get measurements done (no resistors soldering...). I guess you're next video will proove as instructing and interesting, and I can't hold my breath waiting for the next episode.

I would love to know where you can get a pair of "good quality" surrounds for just a few dollars. Please enlighten us.

I'm confused about removing the cone. Why do it if it's not damaged? I replaced the surrounds in my JBL L60T's and didn't need to adjust anything. The cone easily stayed in it's original position. I was prepared to adjust it but it simply wasn't required. 👍

What was that you're overwhelmed I'm the one that's overwhelmed I've been dabbling since I was about 14 or 15 first for two-way radios and CBS now I got to set up Radio Shack Mach 2 so I want to refund dude you got me overwhelmed and I'm scared to death to even try it thanks for the video

Hi Tony. I'm going to get struck by lightning from my passed grandmother, but she snored like your dog or was that the other way around ? Two woofers, your Klipsch speakers ?? Saw that on the Eico rebuild and rattled my little Bluetooth speakers. Thanks for this piece. Would love to see you do a whole speaker rebuild including the crossovers and if you're interested have a set of KLH 5 that would volunteer. Love my 5's because they have the cloth surrounds and do quite well in aging. Is only problem is the crossover caps drying out and board tarnishing causing ground failures.

Hi. Why didnt you glued the new surround under the cone

Just curious why you cut the center cap to only do a surround? You don't have to, I never have And I've never had an issue.. The only time I'm cutting a center cap is if I'm replacing a coil.

I have the same 16 ohm speakers in a Realistic T100 set containing 4 of these speakers with severe foam rot, would rubber surrounds work better, last longer?

Your puppy is a loud snorer for as small as she is :) Are you working on a pair of EPI speakers I have a pair with dual woofers, just can't remember the model off the top of my head.

Nice video, accurate as always, Tony! I wonder, would it be easier to get 4 new 4-ohms 10 inch woofers if there was something unrepairable with one or more of the originals?

You can use puncher outfit glue over the foam before it starts to split . This glue turns the foam in to RUBBER and stey like that for good , ive done it .

I would still remove the degraded/barely bonded foam off the back, in order to avoid debris splatter later ..

38:10 yesss! I know that feeling..

Thanks nice information!

I am guessing these are from the Optimus T200

it doesn't make sense to use shims, the spider keeps the voice coil centered. the shims would just be pushing against the spider and when you remove the shims if the voice coil is not perfectly centered the spider will try to re-center it to it's original position that ma cause a little tension into the cone and surrounds.

Thank you.

My dad has a pair of Rogers LS8a speakers, but the surround has deteriorated (more like powderised). It appears I will have to do a DIY repair to refoam the surround of 4 drivers (which are 6.5 inches / 165 mm each). Can I seek guidance on: 1) where I can buy good quality surround foam and the glue for the repair work; 2) the type or material of the surround I should buy for these speakers (I believe it's the foam type instead of the rubber type). The concern is if I use the wrong type it may affect the sound of the speakers; and 3) I believe do not need to refoam the tweeters (sorry if this is a naive question), hence seeking confirmation on this. Thank you in advance or any guidance provided. Best regards

Well done, as usual. I have, however, a cathedral style field-coil speaker from 1926 that has a ripped cone. The cone will probably crumble if I try to repair it with rubber cement so the trick for me now is to replace it, but it's no standard cone. It's a field-coil cone with a steep angle that ends with a tiny (by today's standards) speaker coil, behind which is a massive electromagnet. Assuming I can fix the electromagnet (some mounting parts are missing) I will then attempt to replace the cone, but how does one do this, exactly? No speaker repair companies sell cones for this type speaker, or do they? Can they be custom made without costing a fortune?

Wouldn't you need to run this speaker at full-volume to test for no voice coil-rubbing throughout the cone's range?

Trying th=his for the first time on woofers. WhWill use availaboe tones off the internet - youtube etc through my receiver. what frequency is best for 10 and 12 inch sub woofers?

Nice 👌

I hate those foam surrounds. I have to do my Advents every 10 years. Not a hard job, just tedious. Thank goodness the Advents don’t need shimming.

does applying too much glue on the dusk cap and also extra glue on the spider where the cone is affect overall sound quality?

How do you measure for the surround? I have not found any consistent answers on that one... The video was really good, thanks Tony! Cheers,

Thanks Tony! Nice job! I guess that some skin flakes on the voice coil won't hurt anything? What if you reconed a speaker using method 2 and the voice coil was not rubbing, but was still a little crooked - would that affect the sound?

👍👍👍😁

I don't have any idea what's canvas they came out of or what the name of the brand is but I can tell you those woofers are a pretty cheap quality

What speakers are those from?

ever clear like 190 proof from liqueur store would that not work or acetone

You are only human Tony.

Nice job Tony. Steady hand needed for this stuff!

Sorry if I missed it in your video but what's the reason you shimmed the gap? To prevent from accidentally adjusting the gap while gluing the surround? I haven't seen anyone else do that.

👍

Hmm looks like p.v.a wood glue.

Al has a low heat capacity soo r u saying that helps transfer heat, right!?!?

It's a guitar speaker ?

❤️🐶😂❤️😍😂🐶❤️😍😂

After the joke the only thing left for the puppy was to sleep even kkkkk

Realistic Optimus T-100

Dynaco A-50?

I'm 25 min in and you do not say why you shim the voice coil. I will continue to watch but you need to say why before this point in the lesson.

Cerwin Vega?

T-100 from Radio shack :)

I really want to guess!!

Qts=1.32!!!! Oh boy, oh boy…

Dynaco/SEA A50?

Bose 601

Surround? Never heard of that terminology. I've always heard it referred as the suspension. Is that a regional thing?

Vintage Celestions? Bozak?

Oh looks like a low quality driver from something like a Realistic Nova-4.

I tell you what I sure would never let you reform none of my speakers you are very messy at it plus you do steps you don't have to do I reform speakers and I never cut the center out of my cones

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Too much talk, it's boring the amount unneeded talk in this video, the guys doesn't shut up. The video could be half the time and have the same information