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About ar_pro

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  1. Thanks for posting the link, I hadn't seen this article before. Art Dudley's current setup can't be ideal for those big Altec systems, which tend to want a lot of air around them; positioned as they are, it might be difficult to avoid some room-induced boominess. Speaking of which, Dudley actually reviewed a Klipschorn in the August issue: https://www.stereophile.com/content/klipsch-klipschorn-ak6-loudspeaker
  2. Sadly, the November, 2019 issue of Stereophile contains an article by Art Dudley that's dismissive of Edgar Villchur's best-known accomplishments: the practical application of the acoustic suspension loudspeaker and the suspended subchassis turntable design. Part of a larger piece, Dudley's history of the era includes a critical comment by Paul Klipsch toward Villchur, an observation that there are virtually no current loudspeakers that utilize the acoustic suspension design, and the question "Since when is wastefulness considered a hallmark of good engineering?" in regard to the relative inefficiency of acoustic suspension speakers and their power requirements. Noting that Villchur's degrees were in art history and education, Dudley writes "word has it" that the claims regarding acoustic suspension were challenged by Klipsch, "whose degree was in electrical engineering". It's uncertain what stirred up Dudley, but to be dismissive of these accomplishments is to deny history. That modern listeners are OK with expensive vented loudspeakers that huff & chuff and must be supported by external kilowatt subwoofers for true low frequency extension says more about the state of listening than the validity of the acoustic suspension speaker. That so many current-design turntables are essentially a low-torque motor glued to a painted sheet of MDF is just sad, and not comparable at all to the effect that Villchur's design had on the entire turntable market of the 1960s and '70s. In closing his article, Dudley considers acoustic suspension to be "under certain conditions, (a) useful cul de sac, but not a path toward reliably greater things." As a point of reference, Dudley owns a pair of Altec Flamenco loudspeakers that he had fitted into his former home, replaced by Devore Fidelity Orangutan systems in his new, smaller listening space, subsequently replaced by the Altecs, and driven by low-powered amplification of one sort or another. The photos show both locations. One could imagine that a properly set-up system using the AR-9, LST, or any of the 12-inch 3-way AR bookshelf speakers could easily demonstrate the fallacy of his "cul de sac" statement.
  3. Yeah, my mistake - I meant double-stack, but for some reason typed triple. Years ago, Tom T. wrote about increased bass output from doubling-up on the AR-3a (2 pairs), but I'd never read anything about increased or extended LF output from a solo pair of LST systems. AR claimed better LF response for the AR-9, but I wasn't aware the LST could improve on the AR-3a in that regard - very cool.
  4. The DB-1B is a beauty in its wooden case, and it will probably last forever. DB Systems never seemed to get the amount of attention it should have from either the mainstream stereo magazines or even the "underground" publications. I remember a long conversation with the owner/designer many, many years ago, and he was really dedicated to putting out a very high quality product at an affordable price. The early Mark Levinson company seemed to have a similar philosophy.
  5. Man, I love that amplifier; it must sound fantastic with the LST. ☺️ Frank: regarding your comment on hearing more bass response from the LST than the AR-3a, is your opinion based upon a single pair of LST speakers, or your triple-stacked LST system?
  6. I really liked my old Dyna ST-150, but not so much the ST-120, which literally sparked & smoked with a pair of AR-3a. ☹️ My nephew has been using a Hafler DH220 with his AR-9 systems for over 30 years; he loves it, and I don't think he's ever had a single problem with the amplifier. It's a real workhorse, like Crown. If you ever get the chance Lou, take a look at the Hafler 915 preamplifier (photo attached); it was a later solid-state model that could remind one of an excellent tube preamp, but with a much lower noise floor.
  7. As ra.ra has mentioned, front, side and rear photos would be helpful. Try to show any sort of damage like dents, deep scratches, or dinged corners, as well as the condition of the grille cloth & panel on each system. Beyond supplying the serial numbers, the labels are not usually a big deal. If you intend to sell the speakers, the less you do to them, the better.
  8. Looks like someone filled out the Stereo Review Reader Service card!
  9. I did exactly this with an AR-1 many, many years ago. The cabinet had been banged up, and the Altec driver was completely shot, but the woofer was in great condition. I think I paid about $20 for the AR-1, and about the same amount for the refinishing supplies that the AR service department put me onto. With a new AR-3a grill panel & cloth, it matched my stacked AR-3a speakers perfectly, and it was driven by the center channel of a Mac preamp into a low-pass crossover and separate amplifier. That was a fun project!
  10. I've always wondered why AR did that with the AR-90, which is a great-looking speaker on its own, and would've been even better with a fully-veneered front & sides!
  11. The 2325 is a beautiful receiver on its own, but with the wood cabinet? - wow! To me, the note that ra.ra posted implies that it's ok to use a 4 ohm speaker as long as you don't try to run the main & remote systems simultaneously, which would show too low a combined impedance to the amplifier. If 4 ohm systems were absolutely forbidden, that note would be the place to mention it, no? The AR-91 crossover board is fairly easy to access for a cap replacement - removing the board (a miserable job) isn't really necessary.
  12. Congratulations on your new AR-9 speakers, Bill - very nice! Years ago, my son and I had a lot of fun restoring and modifying the AR-9 when a pair could be had for less than $200, and there seemed to be an unending supply. As has been mentioned, absent foam inserts for the dome drivers was not uncommon, and it was debated as to how useful they and the Acoustic Blanket actually were. My favorite looking/sounding restored AR-9 systems were without the Blanket, foam inserts, "chrome" trim, and the vinyl stickers under the three level control switches. Spiked feet and new metal binding posts (very nice ones are available from Parts Express) are also beneficial mods. There's been a lot written on restoring the AR-9, especially regarding crossover repair, cabinet refinishing, and wiring options. The very best I've heard were the stripped AR-9 systems in a vertical bi-amp orientation using a pair of Adcom GFA-555II power amplifiers, driven by an Adcom passive preamp, with active EQ for the woofer section using an Audio Control low frequency equalizer. The result was ridiculously good, with excellent imaging & detail, and clean & tight bass response. Here's a link to a couple of old AR-9 posts, but there are many more on this site by several past/present AR-9 owners: http://www.classicspeakerpages.net/IP.Board/index.php?/topic/1280-nude-ar-9-pics/ http://www.classicspeakerpages.net/IP.Board/index.php?/topic/1433-new-ar-9-project/
  13. I've had some success by removing the staples, and then lining up the end of a short 2x4 against the outside of the crossover board & cautiously smacking it with a hammer. Getting the staples out is tedious, and as mentioned, there's going to be a lot of de-soldering, no matter what. ☹️
  14. The AR-91 is an excellent speaker - you should be very happy when they're fixed up. Millersound is the place to go, and Bill's one of the nicest people you'll ever meet. Not that many AR-91 speakers appear on the used market, but the eBay selling price for the individual drivers has been rising for awhile, since the woofer, tweeter & midrange drivers can also be used in the AR-9, which was the top of the line system from that series. Just as a point of reference, the midrange and tweeter often sell between $75 - $125 individually, and the original woofers can range from around $75 to $150 each, depending on condition. This is very inexpensive insurance for guys who own the big AR-9 or smaller AR-90. Please post photos when you're able!
  15. The Altec 8" driver has its own plywood sub-enclosure, so access to the level control would have to be through the woofer hole. You could try rotating the level control back & forth a few dozen times, and you might find a good contact point. There's not a tremendous amount of HF output from the Altec, so running at "full gain" wouldn't be a problem for most listeners. AR-1 speakers in original, unmolested condition have significant value; if you can avoid opening them up, you'd be doing your wallet a favor. As Kent mentioned, the speaker is a 4 ohm model when used as a full-range system, so you'll need an amplifier that's powerful & stable at that impedance. How about some photos to show the condition of the cabinets?
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