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jwgorman

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Everything posted by jwgorman

  1. I cleaned the magnet but there wasn’t really any ferrofluid in mine.
  2. I find it amazing how much of a game-changer a tweeter improvement is.
  3. My apologies. This should serve as a PSA for old guys to not respond to a topic before drinking coffee and without reading glasses!
  4. Jimbo, if he has Cornwall IIs he won’t have terminal strips. He’ll see this...
  5. Are those Cornwall IIs? I acquired a pair of Cornwall IIs last year (circa 1986) and rebuilt the crossovers as a matter of maintenance. I found a solder joint that was pretty questionable, so I’m glad I did. I guess you could start troubleshooting and pull a lead from every driver except the squawker, and with a pink noise signal at a constant spl and an spl meter at s fixed close distance, see what you find. If you keep the variables as close to the same as possible and one squwaker is louder you can then troubleshoot further to see if it’s a diaphragm issue or a crossover issue. There are a lot of smart guys on this board who will probably chime in with a better test but that’s one way. Here are what my crossovers looked like after I rebuilt them
  6. Thanks for doing that! It saves me from hurting myself for science
  7. Chris, is the distortion issue mitigated by say a second order filter on the AMT, crossed at say 3k? Every once in a blue moon I’ll briefly play music that loud.
  8. I just checked the current spec sheets. Looks like the khorn and lascala use phenolic but the CWIII uses titanium mids/tweets.
  9. As some of you know, I’m very sensitive to tweeters Even as an old guy who can’t hear much beyond 12k, for some reason an otherwise great speaker sounds bad to my ear if the tweeter is mediocre. I’m putting my Cornwalls back together from ESS experimentation and decided to try the Crites Titanium replacement diaphragms for the K79s in my CWII. Wow! They totally transformed my tweeters and made the sound very, very good. My original diaphragms measured fine but the Crites are so much more detailed and smooth at the same time. Don’t hesitate if you’re sitting on the fence.
  10. Ah! Ok, combination of cell phone and old man eyes fooled me again:)
  11. This horn looks interesting as a potential candidate for a Cornscala experiment https://www.rcf.it/products/product-detail/-/journal_content/56_INSTANCE_2MT9qNpeXdu4/20195/292743 It would seem like the 5” depth would keep the voice coil of a CD more inline with the woofer VC.
  12. It is a pretty amazing tweeter at an incredible price. Plus, if you look at the housing of the AMT, it’s sort of a horn. I say, touchdown!
  13. It really is amazing how much a tweeter can be a game changer.
  14. Yep that’s them! I’ve even had good luck just sticking a 8uf cap on the amts and disconnecting the stock tweets. It is simply amazing how much just replacing the stock tweeters with high quality tweeters totally transforms these speakers (just using them from 6k up)
  15. On another board I noticed people building with the ESS AMT and I saw an interesting raw measurement. Quite a peak at 5k-ish
  16. If I could paint, I’d grab a black velvet canvas and paint Oscar Heil and Paul Klipsch shaking hands in front of the stairway to audio heaven.
  17. Well. Maybe. I’m going to go passive. And, I already have the mids. Dang it. I’m trying to model bessel 2nd orders at 400 and 1500 and compare them to 300 and 1200. I mean, on paper, it looks good. But my cabinet maker can’t get to my project for another month. So I have plenty of sleepless nights ahead.
  18. Chris, you can’t see this, but I am bowing deeply in respect and gratitude! So, thinking about a 2 way now! Man, this looks awesome.
  19. For those keeping score at home, I preferred the Cornwalls oriented normally, woofer on the bottom in my tests last night. I am using the squwaker in mine though. Chris was suggesting the Cornwall as a two way, bypassing the horns and changing crossover points. Just FYI.
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