[Crossover issues AR-2AX]

9 hours ago, RoyC said:

As ra.ra pointed out, you apparently incorrectly installed the larger cap (6uf) in the tweeter circuit and the smaller cap (4uf) in the mid circuit. There is nothing likely to be wrong with your new film capacitors. There could be issues, however, with what you did with them.

If you did not use a parallel coil of some type with the Peerless tweeter (as you should have with the HiVi tweeter), there is much more current going through it. If so, your intended "upgrade" was most certainly a downgrade. There is also no reason to believe the Peerless tweeter would have represented any kind of improvement over a properly implemented HiVi tweeter.

Buzzing is most often caused by a malfunctioning or over-driven driver.

Roy

 

 

[Crossover issues AR-2AX]

6 hours ago, Chris1this1 said:

Hello original poster, this is easy enough to isolate with use of the mid and HI controls on the back of the speakers. If you are buzzing with the HI turned all the way down, now it’s either the mid or the woofer, then it can simply by isolated further by removing the jumper wire on the back terminals and connect directly to terminals. 1 and T. Still buzzing? Do this connection to both speakers and compare with the balance control, both speakers mids should sound similar, if the buzzing speaker seems like it’s hitting more lower frequencies than non buzzing speaker, its probably a crossover wiring mistake. If both sound similar, but one buzzes, it’s probably the mid driver at fault.  No buzzes? Probably woofer issues.

I’ve never experienced buzzing from new capacitors. Shorted old caps, could probably cause buzzing on drivers, so I’d rule out caps almost immediately if connected correctly. 

Hello, Chris1'. Yes, I did isolate each driver by using the controls. This made a small difference.  I haven't tried the second method, connecting the wire directly to the terminals, but will do tomorrow. 

Now to the modification ...
Thanks. 

[Crossover issues AR-2AX]

5 hours ago, ra.ra said:

Shot-in-the-dark: This is not simple to diagnose, but if these are early 2ax's  with cloth surround woofers, the buzz problem could be from the masonite ring coming loose from the cast metal basket. If so, need to re-glue. Could also be similar situation at masonite ring under the spider. 

...but of course these could be the later foam surround woofers.... OP needs to clarify particular components.

These are the 11" foam surround woofers. 

[Crossover issues AR-2AX]

Thanks, every After just now opening the first speaker, to my dismay, I discovered that in fact, the caps were properly installed.
So, as to the recommended and critical modification to the tweeter, could someone please point me to the instructions.
Thanks again! 

[Crossover issues AR-2AX]

Hello. About 8 months ago I picked up a pair of early '70's AR-2AX speakers. They still had the original midrange drivers, woofers, capacitors and pots installed and a pair of replacement HiVi Q1R 1 tweeters. I replaced the capacitors and pots in December with Dayton Audio PMPC-4.0uF 250 V caps for the midrange and DMPC-5.6uF 250V and PMPC-0.47uF 250V soldered together for the high range drivers.

 Last month I decided to upgrade from the HiVi Q1R 1 a to pair of Peerless tweeters (https://www.parts-express.com/pedocs/specs/264-1676--peerless-da25tx00-08-spec-sheet.pdf). After 40+ hours I began to notice what I will describe as a buzzing sound in the middle frequencies. Yesterday I called and spoke to a tech person who, although unfamiliar with the AR's, made an educated guess that there was an issue with capacitors.

Does anyone have a clue as to why this is happening? Thank you.