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Stimpy

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  1. I believe the AR-9 schematic, that listed a 6.0uF cap on the UMR, was in error. Both the 9 and 90, should use the 8.0uF capacitor.
  2. My wife used to have TSW 410s. A great speaker, with good dynamics. A more lively sound, with a slightly hotter high end, than our AR 9 variants. Well, the 100uF Solen film cap would run over $55 dollars each. So, you'd spend quite a bit just to replace those 2 shunt caps. NPE's are fine there.
  3. Good luck with the Classe preamp. I know a little Acurus L10 preamp really did wonders for my system, so I would think the SSP25 would be much better...!
  4. I've never heard the 91s, but I do have 92s, and the 91s bookshelf twin, the 58S speakers. And I agree with David, that they're a great find, and I'm sure they're wonderful. Nice locating a recapped pair too. Plus, I wouldn't worry too much about the original 100uF electrolytic capacitor. It's a Unicon brand cap, and they tended to last much longer that some other brands that AR used back then. A Japanese manufactured capacitor, that sounds very good as well.
  5. Parts Connexion just changed their website. It's now Audio-Connexion. The new site isn't as easy to navigate, and it's more geared to audio equipment, and not parts. Parts Connexion now requires clicking on a link, within Audio-Connexion...! The PC site has been "updated" too, and not for the better. But, at least the same parts brands are there, they just take a little more effort to find...! Edit: The new AC/PC site is very buggy. I can't even log into my existing account, to double-check the details of a previous parts order...!
  6. Here's a repost of the North Creek file. Hope it works...! the art of bypassing.pdf
  7. The 90s have a fairly low impedance dip in the bass. Around 3.2 Ohms down there. Just where you're hearing issues. So, look for high current amps, that can handle low impedances. That's not necessarily high wattage amps.
  8. Those are final version of the AR-17's, from the High Resolution Series, and they do look correct. AR17 Specs
  9. I've mentioned before, when I used my 90s in a HT surround system, my Yamaha AVR identified my 90s as being out of phase. Allowing the Yamaha to correct the issue, resulted in much better bass, with better balance to the rest of the speaker. At the time, my 90s were straight stock, purchased direct from the factory. So, I've always wondered if my woofers were mis-wired out of phase, when built?
  10. My 90's (bought direct from the factory, around '81) have the adjustment resistors mounted on a separate board. But, a pair of back up 90 crossovers I have, that I sourced from eBay, have the resistors soldered directly to the switches.
  11. A shame the Unicon capacitors aren't still available. Great sounding NPEs. Very dynamic.
  12. Alcaps come in some good AR values; with 6, 8, 30, 40, and 80uF caps. If you eventually try some, I'd love to hear about your impressions.
  13. I like bypass capacitors too. I use them on all values, series and shunt caps. Bypass caps seem to smooth out the sound, while still Improving detail retrieval. Oh, HiFi Collective and Falcon Acoustics, both in the UK, are good sources of capacitors. They could be useful for future projects. Good luck.
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