I just acquired a couple of AR2 speakers (I knew nothing about them at the time but they looked interesting enough) and while they sound good, one of the speakers doesn't sound as clear (more muffled) than the other. Like the "tweeters" aren't tweeting enough or something. It's not as noticeable when listening to both at a distance but when up close I could tell they're different. After perusing these forums it looks like the issue is likely the potentiometer and I'm looking for suggestions/confirmation that I'm suspecting the correct issue. Strangely these speakers, while being the same model, are made a bit different and after researching a bit it looks like it's due to speakers not being sold as pairs at the time. One speaker is unfinished pine and the other is finished (on only 3 sides) but unsure of the veneer. They're clearly designed to be placed on their side, not upright. The problem speaker is the one on the right in the photo, the unfinished pine with a skinnier pot knob and two papers on the back. I've turned the pot a pit to help but it's not enough to make them sound the same. Luckily the problem speaker is also the easiest to remove the cover from as it's just a tight friction fit. The woofer foam still looks good, not cracked. I haven't looked at the other speaker as the cover is not friction fit, likely glued in place and much harder to remove.
Getting into it looks like a chore, there's thick black goop surrounding the woofer, I haven't bothered unscrewing anything yet. If I'm able to get it sounding better I'll likely refinish the cabinets and "attempt" to match the colors even though it's different wood. Probably a gel stain.
On a side note, are there any "tweeter only" speakers? I'm considering putting a couple tweeters on the top of the speakers. I currently have some cheap channel master speakers hooked up and music sounds better when both sets of speakers are running because the dark brown speakers fill in the gaps of higher frequencies that the AR2s don't.