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Martin

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About Martin

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    finpln1@aim.com

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  • Gender
    Male
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    Southern CA
  • Interests
    Early music, J.S. Bach, vintage hi-fi.

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  1. KLH 5 fatal design flaw

    As the happy owner of two pairs of Fives, each pair used in different rooms, I can report many hours of listening to them with absolutely no awareness of any flaws, no fatigue and in fact, have no criticisms of any kind. I'd say Henry got it just right, with two sweetly singing midrange drivers, which to me, sound better than the 2aX midrange and just as good as the AR 5 midrange. To each his own.
  2. Another KLH Five recap

    I am in full agreement with Analogman: hot glue has never harmed any of the dozens of film caps used in any of my past restorations. It's a lot cleaner than hot tar, too.
  3. Very interesting topic. I will respectfully disagree with the idea that the subjective bass capability of a 10" 2aX or 5 is closer to that of the 8" 4X than to the 3a and feel that the exact opposite is true. The 3a certainly has extreme low-bass authority possessed by few others, but the 2aX & 5 come pretty close and are able to accurately reproduce most of what's present, on 1970s vinyl, anyway. The 4x does an admirable job for such a small package, but its limits are too easily reached whereas In practical usage, with music rather than with test tones, the limits of the 2aX or 5 are not so easily reached. Room acoustics & speaker placement seem to be at least as important as 12" vs. 10", if not more so.
  4. Anyone have Dynaco A-45?

    These were not sold in the US. The Seas DNA is evident.
  5. dynaco stacking issues

    Can a person have too many pairs of A25s? If you're anywhere near LA, I'd love you buy your extras. I've been stacking A25s since the early '70s with great results in a room that's 16x30. They're horizontal, on stands 24" high.
  6. Rectilinear X or Xa

    I specifically recall the 100 Hz crossover point as being an important feature of the X and the main reason why Rectilinear called it a very fast speaker. If memory serves me properly, they called it the fastest among the competition as well, referring, I believe, to its overall transient response. I can verify that the Philips midrange is a really sweat-sounding driver and is surely a lot "faster" that anyone else's 10-inch woofer, at that time, anyway. Dynaco's A25 was also notable for its excellent transient response with its light & tight Seas 10" woofer.
  7. Rectilinear X or Xa

    Yes, I forgot to mention the Mini III which also has the potato salad container behind the midrange. The Mini III certainly holds its own vs. the other 8" New England competitors. I prefer it to the 4x, 17 & EPI 100, all great little speakers. I suspect Rectilinear used the MDF subenclosure in the X/Xa to help the midrange cope with the 100 Hz xover, a lower point than that used in either the III or Mini III.
  8. Rectilinear X or Xa

    After opening them up, I see the Xa has a fairly large MDF sub-enclosure for the midrange (& tweeter). Contrast this with the big, plastic, deli container that is attached behind the Philips midrange in the III.
  9. Rectilinear X or Xa

    It's great to see some enthusiasm here for Rectilinear since they are largely forgotten. BTW, the XI & XIa gave the KLH 17 & AR 4x some stiff competition.
  10. Book: The History of Acoustic Research

    If it's of any help, I spent a lot of time in the AR Listening Room in NYC and would be glad to share those observations.
  11. Rectilinear X or Xa

    Great picture! That KLH woofer really looks like it belongs elsewhere, like in a KLH 20, which was the only 4-ohm 10" KLH product I can recall. Looks just like a KLH 17 woofer, but for the impedance. While it's a nice fit, and to the uninitiated, it looks like it belongs there, I think the original woofer used in the X & Xa must have been a bit more robust than the one used in the KLH 17/20. It was probably comparable in performance to the bigger KLH 6 or 5 woofers as the X/Xa were very competent loudspeakers. BTW, I've also owned IIIs, Mini-IIIs, XIs & XIas. You could say I'm a Rectilinear fan.
  12. Rectilinear X or Xa

    Just ran across your post & wondered if you'd found a pair. I've been searching in vain for a pair for many years until last week when I finally found a pair of Xa. Unfortunately, this pair was modified and is essentially, worthless, as the original woofers are missing and replacements are nearly non-existent. I remember the ads for them pretty clearly, even though it's been 45 years. As I recall, they were called a very "fast" loudspeaker. The first crossover point, to the terrific Philips midrange, was 100Hz. It was a radical design which I bet blew lots of midrange drivers and is probably why this model disappeared very quickly.
  13. Advent fried egg tweeter - cage pushed in

    Unfortunately, you won't be able to pull this tweeter's dome out with vacuum as it's too stiff. I was able to pull one out by carefully gluing a tiny, wood, toothpick-like dowel to the dome, letting it dry & pulling it out. If you use too much glue you'll ruin the dome. It's the same technique some body shops use to pull out a dent. They can always use Bondo if they create a hole; you can't, so beware.
  14. AR Grill Badge Numbers

    The A25s were worth the wait, IMO.
  15. AR2ax mid versus AR 4x tweeter

    FWIW, one of my pairs of 2aXs is early & completely original (except for new xover capacitors) and has the exact same midrange mounting panel. All my later pairs have the more common midrange mounting.
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