A couple of years ago, I bought a pair of AR-4X's off a guy from Craigslist, having never heard any Acoustic speakers before but having heard plenty about their reputation. I stuck them in my office where they have been in service at moderate or lower volumes pretty much everyday. I thought they were ok. Nothing to get all that excited about really. Recently, I've been thinking about re-caping them and was inspired a bit by the great AK post about restoring the pots, I decided to open them