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AR-2ax Woofer Repar Question

allan1832

Active Member
I have a nice pair of early AR-2ax speakers that I'm bringing back to life. On the first one I replaced the capacitors in the crossover redid the pots, and put a thin coat of Permatex on the cloth woofer surround. When I compared that speaker to the untouched one the difference was significant.

So far, so good. However, in the process of removing the grill of the second speaker I punched a small hole in the cone of the woofer with the wrong end of a pry bar. (Don't ask!) The hole was about half an inch long, but wasn't through-and-through for that entire length.

After kicking myself for an hour or so I researched how to patch the hole and found lots of advice on AK and on other sites using various types of glue and patch material. Here's what I did:

From the rear of the cone I smoothed out the puncture. I made a patch a little larger than the cut that I made from a coffee filter. I got some Aeleen's Tacky Glue and smoothed some on the back side of the punctured cone, and on both sides of the patch. I applied the patch, smoothed it out well, and added some more glue on the edges. I also put a small amount of glue on the cut on the front side of the cone.

The cone and patch looks pretty good now that it's dry, but I haven't actually hooked up the speaker yet to test. My question is do I need to do more than one layer of coffee filter patch?

The unanswerable question is why the heck would AR make their grills so difficult to remove? Why use both staples and glue (or more to the point, why use either)???????

Allan
 
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Sounds like you did a good job with the repair. If there is no original woofer material missing and its just a tear and the edges of the tear line up perfectly I think the coffee filter would adequate. If there was an actual hole with some of the cone missing I might want to add a bit more material to that spot.
 
F.Y.I. from a Nov. 1970 AR brochure:
AR-2ax
Imp.=8 ohms
Woofer=10" acoustic suspension
Midrange=3 1/2" cone
Tweeter=3/4" dome
Crossover Freq.'s=1400hz and 5000hz
Controls=Mid and High
Price=From $109 in unfinished pine to $128 in walnut, teak, or cherry

Good luck on the fix!
 
Sounds great! Just make sure to check for airtightness once you do put the woofer back in.

And if you haven't been, follow my pot restoration guide: http://www.audiokarma.org/forums/showthread.php?p=3798228#post3798228

tmad40blue, I did use your guide, and I must say that it was awesome. I went ahead and put the woofer back in and it has good airtighness and sounds great. Following your guide results in a large improvement in sound, and I thought they sounded fine before.

Everything came out great, except that one grill is pretty much destroyed--it just wouldn't come out and I ended up breaking it in three or four places. Hopefully it won't be too hard to fabricate.

Allan
 
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