It can be really tricky find air leaks. I've used stick incense to find leaks, but you have to be really careful not to burn things, it's all too easy to mess up and you don't get second chances with fire. If the cabinet sealing gaskets are bad, too thin from years of compression, good quality closed-cell foam weatherstripping can replace it. It's good to re-tighten the mounting screws after a few days too.

33 year old speakers sound great. Old is gold

Bought a set of A70s after watching this vid. Just wanted to say thanks for all the vids. Really enjoy your vids and thanks for the knowledge, tips, and techniques. Peace from Calgary.

I just recapped my a60’s with dayton polys and they sound fantastic.

I re-foamed my old (new in 1973) Heathkit speakers several years ago; I don't recall the model but they have 8" woofers and 3" cone tweeters. The re-foaming was relatively easy, but getting the particle-board cabinets to stop buzzing was a pain. I ended up using Liquid Nails construction adhesive from a caulking gun, to run a thick bead around all the glue joints inside the cabinets. To this day they still sound like new.

You do nice work sir. Owned a pair of Boston Acoustics CR8 in the early 2000s. Excellent set of bookshelf speakers. I know they were bought out some years ago and from what I understand, are nowhere near as good as they once were.

Thank you mister my stop is well worth the pause. Hudson Valley NY again Thank you happy Thanksgiving.

I’ve got a pretty good idea as to how a single speaker out of a pair can age @ twice the rate… After leaving SoCal for the upper Midwest (for the 2nd time) with the bare essentials that included a generator, and my stereo. It wasn’t till spring when someone broke into my cabin, and the only things I could find missing wer my booze, and oddly enough the grills to my Monitor 3.v3’s!? It was then I realized that 1 speaker had peen placed a lil closer to the stove than the other… Can’t put the pix up but the 1, it’s still hold’in even though the foam is gray and I swear I can see through it!? But that happened over 20 years ago, and they just went through their 3 system! And that’s why I’m watching this today…🤘

Great video as always! 👍

@Jordan Pier Thankyou for your reply sir. The transistors must be BF194 & BF195C. I will check them. But when I shake one of the gang capacitor leads it starts to receive and when I tune it it goes off. If i touch the antenna for few seconds it starts to receive again. Last time I was unable to see your replies. Please suggest me an esr meter you would prefer. Thankyou sir.

Interesante prueba de wofer con frecuencimetro amplificado, para verificar que no rose la bobina con el iman buena reparacion Jordan Pier 👍

I have just got a kit to repair the front and top mid range speakers on my BSR DR-1550L floor speakers. Might not be the best speakers ever made bye along shoot but the were free and the have one 15" woofer, one 8" front firing midrange, two horn tweeters, and one top firing 5" midrange. Capable of 200watts max RMS .This will be interesting as I have never repaired the surrounds before on a speakers. Interesting enough the 15" woofers surrounds are still in good shape.

I appreciate you sharing this video. I personally wouldn't use the cutter that way as it seems it's scratching the cone. anyway it's very useful

Thanks!

The two sellers of foam surrounds that you mention both sell the correct foam surround for these Boston Acoustics speakers. The ones you are using here are not those. The correct surround has no inner-flange, but slopes down from the top. This could be a contributing factor in the exceptional extended bass response of these speakers. These are acoustic-suspension (sealed cabinet) speakers, as opposed to the more common bass-reflex (ported) design, and have a more precise in-out motion of the cone. By using the one-style-fits-all surround, you may be changing the sound of these really nice speakers. I hate to point this out, but I see so many people use these incorrect surrounds that viewers should be made aware of the different designs of different speakers, and that subtle deviations from the original design will change how the speaker performs.

For a solvent, nail polish remover would probably work. It comes with a small brush which would allow for more precise work.

Question for Anyone! I have a Boston acoustic a 40 speaker and I heard something rattling around so I opened the speaker up by taking out the woofer, and I found a small sort of double stacked magnet with a little glue on one side. Where did that come off of? Looking at this video I’m guessing it is not from the back of the woofer which has a big magnet on it. From the tweeter? Thank you.

@JordanPier

Жыл бұрын

If the tweeter isn't working, you've found where the magnet goes. If it is, chances are it was glued to the back of the woofer magnet to add additional magnetic flux

Dear sir iam servicing a vintage Philips mono radio it has AC127&128 complementary symmetry pair. AC 127 has collector to emitter leakage but AC128 is perfect in every way. It is hard to find these transistors now a days. Instead of complementary pairs may i use LM386 or TDA2822M as the output amplifier. The voltage is 6V. So LM380N will not be suitable i think. Please give me your opinion thankyou sir.

@JordanPier

2 жыл бұрын

An NTE103a should be a suitable replacement for the ac127, and can be found online

I saw this exact same pair of speakers at a thrift store here in Madera California. I bet that these are the same speakers. Even the rotted foam is rotted in the same place. Did you find these at the Madera Thrift store in Madera California?

Mega views for refoaming.

Smashing repair, well worth the effort jordan. Your bench is disgusting, way too clean for a tech :-D But the lack of coffee/tea drinking is a worry, gotta have something to slurp while repairing. Lubricates the brain ya know :)

I wish you would have used the correct filleted foam.

Hey JP do you refoam for people that are subscribed to you? I have two floorstanding speakers by bose and I never needed to refoam them they are about twenty years old and the last time I checked one of them there were no dry rotten yet! Now the woofers are inclosed in the bottom and away from heat and humidity so I think that is why they have lasted so long! So when they need to be done would you like to do them for me? The model for these speakers are 501 series V if that helps you out! Let me know if you would do them for me OK! That is when they go! LOL Ok thanks!

@JordanPier

2 жыл бұрын

I refoam speakers daily. Whenever you need them done give me a shout. vintageavrepair (at) gmail (dot) com

@Jammerk40

2 жыл бұрын

@@JordanPier Thanks JP! I will keep in touch!

I never really love those American made speakers because of the rotting surrounds. Owned brands such as AR, Electro-Voice, Allison and Infinity. But fortunately my pair of JBL L100 (1st generation) are still in good shape because no foam involved except the front grilles. You guessed it, the grilles are disintegrated. I have a pair of 50 years old KEF speakers that still in pretty good shape that use rubber surrounds. Having learned my lessons, I would avoid any loudspeakers that use foam surrounds, no matter how good or cheap.

41:00 The woofer cannot move freely there, it's acting like a compressor, like it's in oil, is that good? ,it's tied down by the small box; i don't know that brand,even though its *name* sounds good ... lol , and i doubt they designed the box baddly, with no vents,tuned or not ? my home 15s cerwin vegas have nicely sized vents; the rough boxes i put together (for my own use) also have vents, the woofer moves freely, they can actually cool me down a bit with the front breeze... (warning, Hi dBs..)

@JordanPier

2 жыл бұрын

This design is called acoustic suspension or sealed baffle. The principal is by filling the baffle with lots of dampening and sealing it, the dampening slows the travel of air and kills standing waves, making the enclosure seem large to the compression drive (woofer) than it actually is. Although this kills efficiency because the woofer had to push against the sealed enclosure, it does make very small enclosures like this give surprisingly good bass response.

Where do I find parts?

@davidhamm5626

2 жыл бұрын

I use simply speakers, good products, quick shippng.

@JordanPier

2 жыл бұрын

Yep. Simply speakers is great.

👍👍😎✌️

Jordan, I know there isn't any easy way to scrape the foam off the basket, but having your hand in front of the chisel as you scrape, isn't safe.

@JordanPier

2 жыл бұрын

You are correct. I'm very careful about strokes and force to use. I nailed myself once and that was enough. I find the positioning if my hand gives be the best control of the tool, whereas if I hold it lower or elsewhere I have less control.

So you got these for free

@JordanPier

2 жыл бұрын

Nope. But cheap enough to be worth the time.

@nomusicrc

2 жыл бұрын

@@JordanPier I'm not interested but I wonder how much you would sell these for

@JordanPier

2 жыл бұрын

@@nomusicrc ebay completed listings will give you an average

first :P for once.