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Stimpy

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Everything posted by Stimpy

  1. Did you find a nice improvement in sound, with the correct LMR driver? Care to share details about what differences were heard? Also, was the 210045 poly cone better in any area? Just curious. Thanks.
  2. Beautiful work on the refoam. Well done. Also, I just looked again at those 58 woofers. I didn't realize they were that horrible. It looks like someone glued a partial woofer on top of the AR woofer? What were they thinking? Brutal to see good woofers treated like that. I'm glad you had the back-up spares! And hopefully, you can pop out that UMR dome too?
  3. Yep those are 91 boards. And I didn't know that AR used T.I. caps. I believe those are Mylar. The Unicon caps were nice too. Both brands better than the black/red Callins capacitors in my AR90's. Are you planning on a recap, prior to the swap?
  4. Thanks! I occasionally know what I'm talking about. Just don't ask my wife for confirmation.
  5. There was a recent thread, about un-built LST cabinets, being found in a warehouse. But, this was in Italy, so not an easy proposition to get a pair here...!
  6. Make sure that you have the correct AR91 crossover boards. Those same "blanks" were used for both the AR91's and AR92's, which have different crossovers. The correct 91 board, has 5 capacitors, with the woofer cap being 100uF. The 92 board has 4 capacitors, with the woofer cap being an 80uF value. Some different inductors too. As to the rest, that looks like a fair amount of work. Lots to fix. The woofers look usable to me, but will need to be well cleaned. Some huge surrounds on them too, which don't look correct. So, I'm glad they're being properly restored. Those are great speakers, and worth saving. Good luck.
  7. Infinity RS4.5's or AR LST's? What a problem to have...! Congratulations.
  8. Hey ar_pro, The veneer completely matches. It's one solid piece, on the sides. I just need to finish the stripping process, to completely lift the black paint, and I think it'll look nice. As to the blanket, I'd like to remove it, mainly due to the fact that would make the refinish process much easier. Nothing in the way then. But, I'd have to repaint again, after. Though, I guess I could try and veneer the fronts too? I've been thinking about stands for a while. It's something I will definitely try, as the 90's look a bit squat, since to me they have a Napoleon Complex, compared to the 9's. Oh, my listening room is 14x16'. Maybe not large enough? Another reason I guess I should leave the blanket? Though, Tom's comments are very interesting... Stimpy
  9. Nothing too drastic yet, as the acoustic blanket is still in place. The only thing I've done to the cabinets, is to strip the polyurethane, that my brother applied (for whatever reason), along with the black paint. So, while I'll keep the stock design, for the front, I will not be repainting the black woofer trim on the sides. There's walnut veneer under that paint, and I do want to leave it exposed. With the side grills in place, the look will still appear stock, and no harm done. One other variation I'm considering, is to make a short set of stands for my 90's. Something 6-sided, completely enclosed, and maybe filled, that the 90's can set on. The stands will bring the height of the 90's to the 9's. Or at least, match the height of the tweeters between the 2 models. Just for looks. Though, in my listening room, the extra height should improve treble response.
  10. I've been doing exactly that, to my 90s. Or at least, trying to restore them. I recapped the crossovers, with Mundorf poly's and added new Mills resistors. I've replaced all driver surrounds, and added Dynamat to the baskets. I also added a couple of extra cross braces internally. The LMR tube enclosure has been reglued. I'm now working on the cabinets, stripping them down. Though, I'm not sure if I want to refinish them back to stock, or create a pair of Naked 90s? The only question is how to refinish the front, as the 90s aren't veneered on front. It's plywood. (Thanks ar_pro)
  11. Back on topic. All this CES talk, reminds me of a speaker brand that might fit into our AR vs Paradigm discussion. Alon. Or Nola, whichever you find. Now there is a speaker line that sounds both vintage and new. Warm, relaxed, yet dynamic and detailed. I've heard Alon's at dealers, and Nola's at shows, and I've always been impressed with their sound. Plus, they sound good on solid state, but love tubes. A win-win.
  12. I met Brian, Jim Thiel, and Arnie Nudell at that CES. All 3 gone now...! A funny thing though. I was in the Genesis Tech room, listening to their new speakers. Sounding very good, even in surround. But, over in the corner, was this diminutive, quiet man. He smiled at me, and asked if he could help, and how I liked the speakers? It was then that I realized it was Arnie! I got so flustered and tongue-tied, I couldn't answer...! I still regret that.
  13. I met Brian and Shirley, along with John Casler, and the great James Bongiorno (Zoot Suit and all), at CES 2004. Brian was demoing the RM30's and 215 sub, along with Jim's amps. A stunning system. Widerange Ribbons! Wow. A truly rare creature. I wonder if you'd appreciate them more now?
  14. Me too. Very much so. A talented designer, than never got the respect that he was due.
  15. Higher than typical ESR, was why I tried the ClarityCaps. For poly's, they measure very similar to NPE's.
  16. Hey ka7niq, Off Topic. Didn't you used to hang out over at the VMPS Forum? I seem to remember you there? A RM40 owner? I remember you and Brian used to go to war at times. Good stuff.
  17. Yes, I've already refreshed the crossovers. I used ClarityCap CSA polys on the dome tweeters, and ClarityCap ESA's on the dome mids. The parallel shunts were Bennic NPE's. I added Dayton foil bypass caps on all caps too.
  18. I've had similar experiences to you. AR Vertical speakers can be hard to position, to get a good blend of frequency response and soundstage balance. But, AR's are more resolving than I think they're sometimes given credit for. The better their associated gear, the more their sound improves, including image width and depth. I found this out by accident. I had just purchased a new-used preamp. I wasn't expecting anything drastic sound wise. But when I did a quick and dirty set up, for the new pre, and switched everything on, I was floored by the improvements I heard. Especially imaging. That quick session produced the best, most palpable imaging that my AR90's had ever produced, to that point. Very realistic. Holographic. I never knew the speakers had been capable of that type of performance. I've been chasing my tail, ever since, trying to improve that experience, when I should have left well-enough alone...!
  19. I recently found a pair of AR58S speakers, via Craigslist, at a very good price. The young millennial I bought the speakers from, was replacing them with Paradigm Studio 40 V2's. Unfortunately, the Paradigms were not hooked up, so I didn't get the opportunity to hear them. And hopefully, not unfortunately for the new owner, he hadn't heard his new speakers either. A friend had recommended them, and said they were better than his AR's. The millennial took him for his word, which allowed me to be the happy new owner of the 58S's...!
  20. Th AR90 and AR9 both ran the UMR dome from 1200Hz to 7KHz. Only the LMR driver responded to the woofer crossover frequency of 200Hz. Specifications Type: 4 way, 5 driver loudspeaker system Frequency Response: 23Hz to 30kHz Power Handling: 250W Recommended Amplifier: 50 to 300W Crossover Frequency: 200, 1200, 7000Hz Impedance: 4Ω Sensitivity: 87dB Bass: 2 x 250mm acoustic suspension Midbass: 1 x 200mm acoustic suspension Midrange: 1 x 38mm hemispherical dome Tweeter: 1 x 19mm hemispherical dome Dimensions: 1102 x 368 x 386mm Weight: 37kg
  21. Larry and I mentioned several different AR speakers, which could be used in your 9's. Also, there are 4 AR94Si woofer-midrange drivers (none mine) on eBay. They would probably work too. But, I'd first email the seller, and confirm the impedance is the correct 4.5 Ohms.
  22. The 200027 LMR, for the 9's, 90's, and 94's, had 8 mounting holes as well. That makes me wonder if all these woofers were built on a common frame, with like parts? Even the impedance of my 90 and 18 drivers match. Which makes me think that these various woofers can substitute for one another, in a pinch?
  23. It looks as if the drivers were rebuilt by a decent shop. Even though they didn't rebuild to stock. So, if the speakers work, and you like the way they currently sound, I'd leave the speakers as-is. It would cost close to $600 or more, to source the correct woofers. So, I'd enjoy them, without any guilt, because you still have a fine set of speakers.
  24. Stimpy

    AR MGC-1

    I always thought the MGC-1's used the AR48, AR58, AR-1MS 4" midwoofer? At least from pictures, they look the same.
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