wesforster Posted May 17, 2012 Report Share Posted May 17, 2012 I have a pair of AR-4's that I'm going to list on eBay. My troubles are, I don't know the exact model number, I don't know when they were made. The Serial Numbers are...F-16735 and F16954. The manufacturer sticker on the back (where the serial numbers are) lists them as AR-4. I attached a photo of one of the speakers, maybe I missed something.They're awesome and I've never heard a better bookshelf speaker. I hate to sell them but I need the money.Any help is greatly appreciated. Link to comment Share on other sites More sharing options...
JKent Posted May 17, 2012 Report Share Posted May 17, 2012 "Exact model number" of the AR-4?AR-4http://www.classicsp...?showtopic=5764 Link to comment Share on other sites More sharing options...
RoyC Posted May 17, 2012 Report Share Posted May 17, 2012 The model is the AR-4, as stated on the label. They were manufactured in the mid 60's.Roy Link to comment Share on other sites More sharing options...
tysontom Posted May 17, 2012 Report Share Posted May 17, 2012 The AR-4 was introduced in 1964 and continued until October 1965 with the introduction of the improved AR-4x. Both speakers were exceptional performers and received rave reviews/ratings and became big sellers -- particularly the AR-4x. The AR-4x, in particular, helped AR achieve the large (32+%) market-share numbers of 1966.The AR-4 used a special CTS 3-1/2-inch midrange cone driver, and this driver was simulaneously adopted for the midrange of the newest version of the AR-2a, which then became known as the AR-2ax. The AR-4x used an AR-designed-and-built 2-1/2-inch tweeter with improved performance (it even had silicone grease in the voice-coil gap for improved damping and power-handling capabilitiy), allowing an even lower 1kHz crossover for this speaker. AR-4s are much less common than the ubiquitous AR-4x -- one of the best-selling small speakers in history.--Tom TysonThe attached images show a transition AR-4/AR-4x model. The tweeter is the 3-1/2-inch version without fiberglass covering the entire surface. Link to comment Share on other sites More sharing options...
Steve F Posted May 17, 2012 Report Share Posted May 17, 2012 AR-4x crossover was 1200 Hz. 1kHz is a typo, I'm sure.Steve F. Link to comment Share on other sites More sharing options...
tysontom Posted May 18, 2012 Report Share Posted May 18, 2012 Steve,You're probably correct; I've never known for sure. The AR-4 was 1500 Hz, I believe, and the press releases showed the AR-4x as 1 kHz, but I think it was a typo. I'm not sure that I have any company documents showing the xover frequency of the 4x, but Julian Hirsh mentions 1200 Hz in his stellar review of the 4x.--Tom Link to comment Share on other sites More sharing options...
Steve F Posted May 18, 2012 Report Share Posted May 18, 2012 All the AR lit from that 4x's time period specs the x-o as 1200 Hz. That's a given.I can't seem to put my hands on my 1964 AR full-line lit (3, first-gen 2ax, 4, 2-2x/2a-2ax conversion kits, etc), but I'm willing to guess with a reasonable degree of certainty that the 4's x-o was 2000 Hz, given that other AR speakers of the time that crossed over to that same 3 1/2" driver (the first-gen 2x and 2ax) had 2000 Hz x-o's.When I find the lit, I'll update/confirm this post.Steve F. Link to comment Share on other sites More sharing options...
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