Speaker Asylum

General speaker questions for audio and home theater.

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AR-2a Question

Posted by john5 on May 13, 2017 at 11:17:09:

I recently came into two 1962 AR-2as, and neither worked from the usual potentiometer problems. I opened one up two weeks or so ago and resoldered the two leads connecting to each pot's wiper to connection #1, and once put back together it sounded great just listening in mono for about 5 days. Now, a couple of weeks later, I feel the very top end is really rolled off, and I'm a little perplexed as to what to do first since I've read the caps inside shouldn't be replaced, but I'm wondering if them potentially failing could cause this to happen. I'd love to not have to open this one back up but will if I have to, of course. I have no way to measure response but I'm pretty certain the overall sound has changed and become slightly more warm over two weeks, without the top end snap they had when I first worked on them. Where should I start?

(And, yes - I'll get the LPs off the edge before they warp, that was temporary.)