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About johnfalc

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    El Cerrito, California USA
  • Interests
    Music, Audio, Vintage motorcycles, Photography, Computing technology

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  1. Both of my sets of the 200027 (i.e., all 4) have eight mounting holes and seamless cones.
  2. I really haven't taken the time to give the AR-90s a critical listen since I installed the correct drivers. I definitely heard (and measured) a difference when I removed the 210045 poly cones from the AR-9s and replaced them with the 200027 drivers. That difference had to do with balance/coloration in the lower mid-range ... most noticeable on female voices (I'm a big Kate Wolf fan). I never played around with the level switches when comparing, and the 210045 were "hotter" in their band-pass as noted in my original post on this thread.
  3. Here's the eBay item number for those who might benefit from these 9LS / 9LSi 8" drivers: Item ID: 283735409408
  4. FYI - I managed to find (on eBay) a good pair of 200027 LMR drivers which are correct for my AR-9s, so I've listed the 210045 8" drivers I took out of my AR-9s on eBay. These (the 210045 drivers) are correct for the AR-9LS and AR-9LSi and were replacement parts (maybe originals also, IDK) for some other AR speakers with 8" drivers. Anyway ... making this post to alert anyone who's looking for these - they're perfect except for a small tear in one of the surrounds. DCR on the voice coils both measure exatly 5.28 ohms. I refrain from posting the listing URL since I don't know that to be allowed on this board (which I value highly). John
  5. I have a pair of these AR metal stands that I used for many years with one of my my AR-3a pairs. They fit perfectly and I liked the result.
  6. Here's a LINK to Audio Magazine, July, 1955 which on page 18 has an easier-to-read version of the first article Pete B posted above. BTW ... the RADIO HISTORY site is a joy to me, audio nostalgia extraordinaire! The site itself looks like something I might have created (style-wise) 20+ years ago ... probably usable with Mosaic! Here's a link to its home page: https://americanradiohistory.com/ Oh, and just a warning, if you haven't been to that site before you might want to grab a glass of wine and plan on hours of fun time reading.
  7. Sorry to hear of your illness and, BTW ... lovely examples of one of my favorite speakers. John
  8. johnfalc


    Very nice ... I always liked those best of the bookshelf models. I still have the metal stands for them.
  9. Giorgio - Thanks but those have a DCR too high for application in the 90s or 9s. John
  10. I truly am loving them Michael ... enjoying browsing my collection of all genres. Thanks again, John
  11. Ra.ra: Thanks, but the 8" you describe are of too high a DCR for this purpose; nice drivers though. Stimpy: Thanks for the info you provided. For the time being the AR-90s (infrequently used) host the 1210045-0. Thankfully, I have the right drivers (stolen from my AR-90s) in the AR-9s and they're sounding great. I haven't really had a chance to spend quality time with them since I left the stereo/audio industry some 31 years ago. I'm really enjoying them, regardless of the source: CD, LP, FM, music server, or streaming. The cabinets, after a bit of lemon oil, look almost as though they just emerged for the first time from the shipping cartons, I really appreciate the care the one other owner and his wife took of these. The serial numbers differ only by 3. I believe they will outlive me, and become multi-generational in our family. They do play louder than the AR-3as they will displace in my living room, and they like power, but I have enough of that with the Carver M1.5t. I have three M1.5t (I buy these when I see broken ones at bargain prices - fun to fix although awkwardly compact). Back to listening!
  12. I recently bought a beautiful set of AR-9s (you may have seen the post from "Goose" last week about their availability - this post was moved to the "For Sale" section). Goose (Michael) was the original owner of these (bought them as a Teledyne employee) and he mentioned to me that, about ten years ago, he'd had the woofers and lower midrange worked on (he thought just new surrounds). All the drivers work properly but I was suspicious that the LMR had been changed given the different cone material from the proper LMR set in my AR-90s. The new AR-9s sounded impressive but with a bit more "wooly" feeling in the lower range of vocals than I expected. I measured the output of all drivers with the XO set to 0 by all three switches and took measurements of pink noise with a calibrated mic just 1" ahead of each driver just for reference. The tweeter and UMR were both about 3-5 dB lower in output than the suspect LMRs when looking at an FFT display in each drivers covered range. So ... I pulled the proper drivers from my AR-90s and installed them in the AR-9s (and while doing so found that whoever had worked on the AR-9s had failed to install gaskets for the LMRs). The result: Taking the same measurements as characterized in the preceding paragraph, all drivers are now within very close to the same output levels in their respective ranges and the speakers sound noticeably clearer, especially on vocals with content in the lower range, like Odetta, or even Bob Seger, or Kate Wolf. So ... I'm in the market for a pair of 8" LMR to restore my AR-90s to "stock" but am also interested in first-hand experience using other 8" AR drivers as substitutes, especially ones that have the original formed-paper cones rather than the plastic (polyethylene?) cones on the 1210045-08 (maybe 0B - hard to see) that my new-to-me AR-9s came with. Thanks, John (who is still convinced he got a fair deal on some beautiful speakers he's wanted for a long time).
  13. I bought these today from Goose (Michael), the original owner. It turns out he was a Teledyne engineer and bought these for 50% off as an employee in 1980. They are really quite lovely. I haven't hooked them up yet but don't anticipate much will be involved in taking them to like-new condition. He even had the original sales and owner's literature in its original envelope. Michael and his wife loved these speakers and seemed genuinely pleased that they're going to an AR enthusiast who will love them, and not molest and flip them. I really need to (eventually) make some decisions about what to keep. I now have AR-9, AR-90, AR-92, AR-2ax and 2 pair of AR-3a at home and a pair of AR-4x with my son in Philadelphia. I'm feeling very happy today, and thankful for the friend who drove with me to make the pickup - BTW as a point of possible interest, these fit perfectly in the bed of my Honda Ridgeline, almost as though they were meant for one another. John
  14. Hoping they're still available ... would be a nice step up from my AR-90s and a fun project to boot.
  15. I run my AR3as and AR90s (separate rooms) each with their own Carver M-1.5t amps (and I keep a spare, just in case). These work wonderfully. The only limitation I would point out to potential users is that your home wiring must be up to snuff in terms of its current delivery capability, this because of the nature of the power supplies in the Carver amps. I bought the amps "as is" and "for parts" and enjoyed fixing them (50 years ago such work paid my way through UC Berkeley). They're totally reliable, take up little space, by design the keep the output devices within their safe operating areas, and sound great. Power (given the caveat mentioned above about house wiring) is NOT a problem! Here's a product sheet from back in the day: https://us.v-cdn.net/5021930/uploads/editor/ka/pme5br8zsaqj.pdf Cheers, John
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