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Don't ever walk away from a vintage pair at the thrift - AR3a

MikeCh

Super Member
Lest they get sold out from under you or destroyed in the wrong hands.....

Decided to stop off at the thrift store again today and saw a ratty old pair of AR3a's. Scratched up cabs but the grilles looked good upon initial inspection. I gently pried the grille off of one with my pocket knife and saw that the woofer had a dented dust cap and could use a re-foam (due to a small tear) but the foam itself was pretty darn good. Did the same to the other speaker but didn't quite take the grille all the way off. The woofer dust cap on this one was not dented (never had the grille of at all I guess) and the foam was in great shape. I worked the pots on the rear and noticed that one of the Mid pots didn't turn fully as the others did. I asked the guy "how much?" and also if they worked and he said, "$30 and they worked yesterday when they came in". I had a car load of work stuff and said "I'll be back once I make room in my car".

When I returned, they were gone. I asked the fellow if he sold them. He said, "nope, I hooked them up and they were trashed so I threw them in the dumpster". :yikes: "WHERE?" I said. He pointed and I asked him if I could dig them out. "Yep".

Well, as I was digging about (without actually climbing in the thing) he came out and started sifting with me. He went to ask the young kid who supposedly threw them out, where in the dumpster they were put. He hollars, "hey they're on this truck over here, going to the other store". I told him I'd like them if that was ok.

As he went thru the loaded truck I cringed when he walked out with the first one. During his "testing" earlier after I'd left to go empty my car, he was not very careful with the grilles and crushed one of them getting it off. The other one now has a hole in it from where he stuck his fingers thru to pry the grill off. DAMN.

In the end, he just gave them to me for free. All original drivers with sequential serial numbers and the paper instructions/warranty on the cabs, albiet they are pretty ratty and the grilles are now bust. I also suppose that when I'd cranked the pots back and forth and had left them on the "min" setting that he deemed them broke when tested again?

Hooked them up just now and MAN THESE THINGS ROCK THE HOUSE!!!! So far I'm in love, love, love. The pots are a little scratchy but not bad....though the one seems to be either seized up (turns only about 3/8 as much as the others do) or worn out, it still works and seems to allow the proper amplitude across the freq range. :scratch2: The low end is outstanding and the imaging of the upper frequencies is something special....

Mike
 

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Are you sure the surrounds are foam, and not cloth? Those woofers (to these old eyes, anyway) look to be the cloth surround type, with the foam ring around the dust cap. If they are cloth, and not foam, a re-doping should get them back to good as new. Enjoy......you got a helluva deal! :D
 
Are you sure the surrounds are foam, and not cloth? Those woofers (to these old eyes, anyway) look to be the cloth surround type, with the foam ring around the dust cap. If they are cloth, and not foam, a re-doping should get them back to good as new. Enjoy......you got a helluva deal! :D


Joe, after doing some searching I do believe these are the Alnico drivers? They don't feel like the other foam surrounds I have and I'm not sure what cloth ones feel like.....but I do know that one of them has a small 1/2" tear in it.

Is it possible to repair such a tear? Please do tell about this re-doping technique, as I'd like to get this pair fit. Been listening to them all afternoon/evening and they are awesome.

Mike

edit: did a search and found info on doping.....off to read.
 
Here is where you can get new grill cover cloth: http://www.dharmatrading.com/html/eng/3582-AA.shtml

I ordered their hemp summercloth, and while it's very attractive, the thread count is higher and the fiber woollier than the original AR grill cloth. I have trouble believing it could be as acoustically transparent. Like several things I've found locally, the hemp is "close, but no Monica" and I will not be using it in my AR restorations.

I'd love to hear reviews of the different cloths from Carl, the one from Larry (Vintage AR), the one from ebay seller hifikat, and the mummy cloth from Class Act Fabrics. All are marketed as AR replacement cloth. One of these has got to be what I'm looking for.

Congratulations are in order, Mike. It looks like you're the newest inductee in the AR restoration club. I'll second the recommendation for the AR forum at classicspeakerpages.net.

You've definitely got an early pair of 3a with the alnico woofer. Using a fine needle and extreme caution, you can probably get that dustcap pulled out to a large degree. If the tear in the surround is that small, it might be able to be repaired somehow before re-doping, but I'll leave suggestions to someone else. You could also seek out another alnico driver. You probably wouldn't spend above $50. They're available regularly, unlike the tweeters.

You can read all about the potentiometers in other AR threads, but suffice to say you'll probably want to do something about them. The cabinets (and I'd wager even the veneer) aren't too far gone to be saved, given enough sweat equity invested. I'll trade you for mine. :D
 
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Are you sure the surrounds are foam, and not cloth? Those woofers (to these old eyes, anyway) look to be the cloth surround type, with the foam ring around the dust cap. If they are cloth, and not foam, a re-doping should get them back to good as new. Enjoy......you got a helluva deal! :D

Yes, those are the older version woofer. Starmover posted here about his fix for the cloth surrounds - I bought a can but have not tried it yet. Read the whole thread, most of it will pertain to your repairs except for the capacitor values.
 
Damn....you guys are so helpful! Thanks much for pointing me in the right direction re:refurb on this pair....lots to read and take in :thmbsp: I'm getting excited to tear into them.

On the issue with the woofer surrounds: If they are in fact cloth, they seem to vary in their consistency. By that, I mean they are kinda squishy-soft in spots and firmer (but not stiff) in others. I'm hoping that re-doping will fix the inconsistency? Also, do you think that shoe-goo stuff in a real thin layer would do to seal the 1/2"-3/4" tear in the surround?...or would that be a bad thing to apply?

Thanks again gang!

Mike
 
Carl's Custom Loudspeakers (Carl's around here on AK somewhere) has a great test of several different grill cloths for ARs.

I've found Irish linen needlepoint cloth to be the closest cloth to the original... in color, thread-count, transparency, and texture.
 
On the issue with the woofer surrounds: If they are in fact cloth, they seem to vary in their consistency. By that, I mean they are kinda squishy-soft in spots and firmer (but not stiff) in others. I'm hoping that re-doping will fix the inconsistency? Also, do you think that shoe-goo stuff in a real thin layer would do to seal the 1/2"-3/4" tear in the surround?

They are stiffer/softer because the dope is gone in areas.

Check the link to Starmover's thread above - what he's using is elastic crack sealant... might handle that little tear quite nicely without any extra work. Re-dope the surround and fix the tear all in one pass.
 
There are plenty of doping materials out there, including rubber cement, but, I swear on my speaker collection, if you want to do it right, contact, I believe it's vintage AR, for a jar of his excellent, and I swear thee best, dope surround stuff. He doesn't advertise it for sale, but will sell it to you. It's fabulous!

Do a search for Rod G-6000 's resto on the AR4x- they are with me currently- the doping material is perfecto.



...Oh, bother... there he goes again, with that dang needlepoint....:smoke:
 
LOL, I was thinking the same thing after reading Starmover's post (before reading your post). I guess if it doesn't fix the tear, then I'll address that later. Thanks for putting me at ease with stiffer/softer surround issue.

Mike

p.s. When I first stumbled on this pair of 3a's today I honestly only saw $ in flipping them, but as I continue to sit and listen tonight I've concluded that that would be heresy....now I need to determine which other pair I'm gonna flip to keep the peace in the house :D If they sound this good now, I can't imagine what clean pots and a recap would do....not to mention a sanding/finishing of the cabs and new linen grill cloth :banana:

I can see (hear) now why they garnered rave reviews then AND now.
 
There are plenty of doping materials out there, including rubber cement, but, I swear on my speaker collection, if you want to do it right, contact, I believe it's vintage AR, for a jar of his excellent, and I swear thee best, dope surround stuff. He doesn't advertise it for sale, but will sell it to you. It's fabulous!

Do a search for Rod G-6000 's resto on the AR4x- they are with me currently- the doping material is perfecto.




Slightly OT I know, but...

Deli:
Is this doping material for AR's exclusively, or will it work on any cloth/fabric surrounds? I've a couple pair of Bozaks in need of some doping. The original black latex doping is all hard and crusty.
 
St John,

It should work with any cloth/fabric surrounds.

I was very impressed with how well it worked. To me, it's a no-brainer, and there's nothing else I'd use on cloth surrounds but this elixer.
 
A little light sanding on those cabinets followed up by some oil or stain, and they'll look as good as they sound! :yes:

Nice catch! :thmbsp:

Scott
 
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