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New score - Boston Acoustics A150s - Need Help!

That's not a Seas tweeter.

Looks like a bad DIY refoam job with the incorrect surrounds. These use the fillet type. Rick Cobb is one of the best sources for the foam. Looneytunes something on the bay.

As stated A100-A150 are the same woofer. These are easy to refoam and aren't that fussy. Some definitely need shimming to avoid VC rub, these are fine with test tone method.

Best option for a trashed woofer is finding used here or bay or were ever one would pop.
 
I have, in the past, been able to get a correct recone kit for the A100/A150/A200 woofer. I am going to check and see if it's still available. It will depend on whether the Jensen-style three-rib cone is still available. If so, then it's pretty routine to recone those- and it shouldn't be terribly expensive.

Regards,
Gordon.
 
(I promise this is relevant to the thread-ish) Several years ago, I saw a post in Bartertown from a guy in OR (12 hrs north of me) who was getting out of the hobby and wanted to sell his hoard. I was new to the hobby, and thought "what better way to spend a day then drive 6 hours, meet in the middle of nowhere, and buy a bunch of stuff from a stranger for about a grand". We arrange the meet somewhere north of Sacramento in a small town, Williams, CA, in the parking lot of an apparently famous restaurant called Granzella's Inn. The place is...interesting, right down to the Grizzly bear that stands inside (google it).

Anyway, we connect and he starts unloading stuff. No fewer than 6 Advent 300's, a bunch of Scott tube tuners, some Dynaco components, a pair of Mourdant Short Carnivale II speakers (very nice), and other miscellaneous stuff. In the stash were two pair of...Boston A150's. One fully restored, the other empty cabs with a box of spare parts. I'd never thought much about Boston speakers (new to the hobby and all) but my ear was originally tuned to my first real audio purchase, a pair of Advent New Loudspeakers I bought in college (they were new, I'm old). The A 150's are amazing sounding speakers, and well worth restoring. Here's hoping you get all the parts and have some good luck in putting them back together.
 
I would take Gordon’s advice and try to epoxy the cone back in. It will cost you nothing but time. Also, since you have the dust cap off you can do the surrounds with shims, therefore taking the alignment question out of the picture.
I have read enough threads about failed refoam jobs because aligning the VC was deemed unnecessary.
 
GordonW said:
If that woofer still has continuity- you might want to try shimming the voice coil, squaring up the cone so that it's as close to level at the edge (relative to the frame) as possible, and bonding the cone back to the coil with some epoxy. Then, refoam the woofer. It might be save-able. I've had probably about a 50% success rate, fixing that, in this fashion.

Regards,
Gordon.
Click to expand...

Is there any specific type of epoxy that I should use if I try this method?
 
cwh said:
That's not a Seas tweeter.

Looks like a bad DIY refoam job with the incorrect surrounds. These use the fillet type. Rick Cobb is one of the best sources for the foam. Looneytunes something on the bay.

As stated A100-A150 are the same woofer. These are easy to refoam and aren't that fussy. Some definitely need shimming to avoid VC rub, these are fine with test tone method.

Best option for a trashed woofer is finding used here or bay or were ever one would pop.
Click to expand...

Thanks for the info on where to get foams! I know this one wasn't the Seas tweeter, I was just saying the possible donor pair I had found were a Series I A100 that had the Seas tweeter.
 
grillebilly said:
I would take Gordon’s advice and try to epoxy the cone back in. It will cost you nothing but time. Also, since you have the dust cap off you can do the surrounds with shims, therefore taking the alignment question out of the picture.
I have read enough threads about failed refoam jobs because aligning the VC was deemed unnecessary.
Click to expand...

I'll probably end up giving that a try this weekend!

I wasn't initially planning to pull the dust caps but then I realized that they were both crooked, so I want to do them correctly!
 
GordonW said:
I have, in the past, been able to get a correct recone kit for the A100/A150/A200 woofer. I am going to check and see if it's still available. It will depend on whether the Jensen-style three-rib cone is still available. If so, then it's pretty routine to recone those- and it shouldn't be terribly expensive.

Regards,
Gordon.
Click to expand...

Thank you for checking :)
 
It's almost the weekend, so here's hoping your efforts are successful. You'll be rewarded with a wonderfully satisfying set of speakers. We had a pair until I came across a pair of A400's. Learned how to do a refoam on them. Alas, we moved to a place that doesn't accommodate their footprint, so they found an appreciative home.

Do let us know....................................
 
Started working on the hopeful woofer today! Followed GordonW's advice to epoxy the cone back to the vc assembly. Luckily some parts were still attached so it was easy enough to find the original line-up to re-epoxy. Hopefully this ends up working! Waiting on foams, ordered some from Rick yesterday.

Also started heavily cleaning the frame, so I'm done with that now. Any advice for best tackling removing the foam from the cone? I practiced on the ruined one and got a decent enough rough edge (using a utility razor blade and acetone), but some paper came up with it. I attached pictures of my practice cone - how much more refining should I shoot for? I know I'm not super close yet.
X5QCyu+RTPKJoIath0AQQA.jpg EdjGRDYAT%GQNlVqzNHYxw.jpg
 
efrance45 said:
Is there any specific type of epoxy that I should use if I try this method?
Click to expand...

Many old woofers suffer from failed old glue. 2 part epoxy in the tubes is fine,
but I've been using JB Weld lately because it is good for very high temps. It
is also 2 part in tubes.

Some examples:
https://audiokarma.org/forums/index...epair-some-measurements.819443/#post-11534132

https://audiokarma.org/forums/index.php?threads/epi-100w-foam-popped-woofer.633766/#post-8403135

https://audiokarma.org/forums/index...ofer-spider-glue-let-go.819079/#post-11525714
 
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Don't give up, they are decent speakers and you can fix them. If not send them to some one who can do part by part. Worth it. Todays speakers for the price you will pay just won't compare.Really!
 
Finished up the refoam completely yesterday evening! The process went very smoothly using advice from here and also Rick's foams and instructions sheet. The dust caps I sourced from Midwest Audio. The dust cap is still a bit crooked because I had to make sure the old cap remnants were covered. Also, the previous poor refoam job made it look like my work was sloppy, if you can believe that!

Been testing the single speaker today and I'm definitely going to be sourcing another woofer to complete the set!

Q8lmsGUeT4K+3f7kMZx7SQ.jpg jA3lj7PJT1yaKn8Ak2VUiA.jpg
 
efrance45 said:
Finished up the refoam completely yesterday evening! The process went very smoothly using advice from here and also Rick's foams and instructions sheet. The dust caps I sourced from Midwest Audio. The dust cap is still a bit crooked because I had to make sure the old cap remnants were covered. Also, the previous poor refoam job made it look like my work was sloppy, if you can believe that!

Been testing the single speaker today and I'm definitely going to be sourcing another woofer to complete the set!

View attachment 2126049 View attachment 2126050
Click to expand...

Is the other woofer definitely cooked?
 
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