How to refoam your Boston Acoustics A-120 passive radiator / woofer.

nice n easy since there is no voice coil to center!

[@tocsa120ls]

As they say... "Use an old chisel. If you use a new chisel, it will be an old chisel by the time you're done." ;)

[@Steve71534]

I'm working on an A120 as we speak. What glue did you use? And where did you get the "foam" surround? All I can find is the ringed type. Thanks

[@GoldSrc_]

Nice repair. And good job on the weight loss, keep it up.

[@NickNorton]

Nice work JP. I still have a pair of 40 year old Speakers to refoam.

[@themaritimegirl]

Those are some sexy speakers. I've never seen passive radiators in action!

[@radio-ged4626]

Not a Hi-Fi buff myself, I was only aware of tuned port-holes, didn't know they made passive speakers. I wonder how many people are aware they are buying passive base speakers when they get a set? Interesting video - thanks for sharing your knowledge.

[@RadioFixer]

Great job fixing these speakers 👍👏👏

[@bradfordaudio]

Well done on your weight loss! Good advice to take care of yourself.

[@Nirky]

Yeah back in the 80's I had a pair of Boston Acoustic A70 series which the foam started to biodegrade in the 90's.

[@bigalsmallengines]

Good video and congrats on your weight loss! Cheers! 🍻 -AC

[@MVVblog]

Wow.. the woofer is actually the passive radiator and what pretend to be a midrange is a woofer ... Weird but effective! The Little woofer is good at transient and the radiator can handle the low frequencies where the little woofer is not efficient.

[@jdpinbaytown]

I've Refoamed a few Woofers, Including a set of Cerwin Vegas I did for my Brother, They turned out great, But sadly they were ran too long with bad surrounds and the voice coils rubbed and they quit working

[@tntreviews3602]

Hay Jorda i got a quick question . I have a ONKYO DUAL CASETT DECK I REPLASED ALL OF THE BELTS THE REC SIDE WONT PLAY BUT IT REC FINE DO U NO WHAT CAUSES IT THANKS.

[@JordanPier]

Hard to say. Have to study the circuit with schematics and compare with what the set is actually doing

[@halhagan3402]

No way I would first glue up something floppy like that foam beauty ring then descend that onto the speaker - so much risk that the gluey side will touch the new foam or the cone... Whenever I do those, I apply the glue on top of the outer area of the basket, on top of the foam's outer flange, then place the dry beauty ring on top of that... zero risk of getting glue on anything but the bottom of the ring.

[@gRosh08]

Cool.

[@jrcat2258]

KZbin recommended this video to me, but hey, good video! What's the difference between a woofer and a passive radiator? Is the woofer powered by an internal amp? Or does it only have to do with the frequency crossover?

[@rudge3speed]

A woofer has a coil driven by an amplifier, a passive radiator has no coil and its movement is caused by a woofer in the same closed cabinet. Often the radiator is mounted in the back of the cabinet. Most modern speakers use a port instead of a radiator.

[@GoldSrc_]

Passive radiators are used because it's cheaper and you get pretty much the same results as you would with a real woofer. That, along with the fact that such system uses less power to achieve pretty much the same frequency response because you are only driving a smaller (in this case) speaker only.

[@toddanonymous5295]

A mechanical fuzz tone !

[@kgsalvage6306]

Good job, Don't drop your knife on the cone.

[@moon1985bc]

what is the name of that black glue?

[@themaritimegirl]

He said what it was right in the video.

[@nomusicrc]

So the second speaker from the top is the “woofer” and the bottom one is a passive “woofer”

[@JordanPier]

Yep. Kinda like the polk monitor series is designed. The theory that the small woofer is fast for good transient response, and the passive tuned with the box for lower bass the small driver can't really do on it's own

[@nomusicrc]

@@JordanPier so why not have a functioning large woofer for the low frequencies

[@JordanPier]

@@nomusicrc similar results can be achieved for less, and that's why they do it

[@rogertyler3237]

I Bet Pioneer Or Sony Would Cary Their Own Brand I Bet Amazon Would Cary Springfield Speaker Repair.

[@zx8401ztv]

A sudden case of twisted tongue :-D Well done losing weight, not easy.

[@Synthematix]

Cant believe theyre using such a small driver to push such a big radiator, damn thats horrendous, should be the other way around