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Deang

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Everything posted by Deang

  1. Do NOT add ferrofluid to a driver that wasn’t designed to use it. Modifications to your speaker, especially the crossover, typically just gives you a brighter speaker. The sound will be a bit smoother, but will also sound out of balance. Use EQ or tone controls instead.
  2. Like Mike said, since the 3636 has exactly twice the inductance, the plots look symmetrical - but that does not mean they are the same. If you look closely, you'll see the rate of attenuation below the cut-off frequency is different. Compare the capacitor only line, to tap 4 at 400Hz and 200Hz. 10dB/octave is not 12dB/octave. Since this relates to rate/amount of attenuation being applied just below frequency cut-off, maybe think about this in terms of what is happening at the diaphragm. It sounds different because it measures different. Now, there is a way to band aid this, and if you were paying attention, Mike discussed this in the AK thread. Same with the capacitors. Modest change, but very audible - and of course all of these changes are accumulative in their effect.
  3. Kind of confused. You were following Mike’s thread on Audiokarma, and even “liked” the post with the plots.
  4. 16 gauge, but consider the capacitors and coils are 18 or 20 gauge. The runs on the board are so short I don't see how it matters. From the drivers I would use 16 gauge - which is what Klipsch used.
  5. Contrary to what we’ve been told over the years by various individuals, the T2A has working inductance in parallel with the K-55. It creates a 12dB/octave slope. The same applies to the other Klipsch spec autoformers, though in some cases an inductor is put in parallel with the autoformer to maintain the 12dB/octave slope below the cutoff frequency. The 3619 and all its variants (3636, 3654, 3619-ET, and 3675) have twice the inductance. They also use a different steel for the laminations. They curve different. Based on what I’ve seen, it doesn’t seem likely it wouldn’t be audible. Anyway, good units for other applications but not Klipsch networks. Someone asked about the wiring. The original wiring is tin annealed stranded copper.
  6. The point was simply that if it was there to begin with, it should be there when you’re finished. Now, if you have a problem with the link or note, just ignore the information and do whatever you want.
  7. It is correct. There is also an imbedded link with further instructions. I found the following in my notes: “Ferrofluid provides mechanical dampening and dramatically reduces Qms [and thus Qts] of the driver and flattens its impedance curve in the Fs zone. If the ferrofluid is removed, then most T/S parameters of the tweeter will change. Qms will be higher and the driver may tend to peak near Fs before rolloff, even Fs may change. The crossover would also need to be redesigned since the impedance curve will have different shape and a big resonance peak.” The following is not correct: “I cleaned the fluid out of the gaps with folded sticky notes until it was clean enough (as recommended by Michael Crites) Installed the new crites diaphragms. No sweat. No ferrofluid necessary.”
  8. If you aren’t close to 100% certain of a thing, please don’t give advice. I would also start avoiding some of the “Klipsch” Facebook pages which are now often filled with poor advice and incorrect information. https://speakerrepairshop.nl/en/questions/ferrofluid/c-34#:~:text=Yes%2C applying ferrofluid will increase,ferrofluid and the correct quality.
  9. If you sent the crossovers to Klipsch, they would have tested them, and then cleaned them up. They would’ve unscrewed the capacitors from the board to check for leaking oil. If the cans checked out, they would have wiped everything down and sent them back to you. I’m sure they’re fine.
  10. Yeah, 400 hundred hours for those caps to burn in. 🙂 Edit: that was a joke. Anything a capacitor is going to do it’s done doing in 10 hours or less.
  11. Internet troubleshooting is like playing whack-a-mole. “‘Muddy” is what you would hear with a blown driver.
  12. Tap 4 on the T2A is really -3.35dB. When you add the 5mH in parallel with K-55-M, applied attenuation of the T4A is virtually the same.
  13. @SpeedLimit You haven’t been here in a while. This section isn’t the old odds and mods you remember. Head over to AK forums if you want to talk mods.
  14. 4500Hz. Two primary reasons for that. Roy doesn’t believe a driver should have to do anything it wasn’t designed to do. The single port phase plug isn’t giving you 6kHz without the collapsing verticals of the K-400, and if you’ve seen the published response in the Dope from Hope, it’s pretty rough. The other reason is for a smoother power response, you want the polars at the crossover to match.
  15. Only the engineering samples were “hotter”. When the production samples showed up, they weren’t. Frequency response is not identical, but sensitivity is. A two port phase plug K-55-V was used to design the AK network. Compare AK to AK-3 (schematic). I roll AK-2 users back to the AK, since the low pass cap is the same, and the high pass section is the same as the AK-3. Use the AK, AK-3, AL-3, AB-2 with any 2 port phase plug variant, including John Allen’s driver.
  16. Use them as cabinets to practice on. I’m sure there are a lot of youtube videos on this. All I see are character marks.
  17. I would remove a few non-relevant posts and pin it.
  18. Way at the top, I asked that you send me a PM or email. 33uF is roughly 600Hz, which at least gets you above the Fc of the horn. You can buy them any place that sells capacitors. If you want the same type capacitor, just read the label. The 2.5mH is the same value the Type B uses, so you know it's occupying some of that same space around 600Hz. The Universal isn't as "universal" as everyone thinks it is. It was designed to be used with the K-55 and K-400/K-500. It was called "universal" because it could be used in the Klipschorn, La Scala, and Belle Klipsch. The K-400 has an Fc that is almost a full octave below the crossover point (280Hz). It can be tweaked to be used in the Cornwall or Heresy. It wasn't designed to support any and all driver/horn combinations. Kevin, and some others can get away with it because they are using larger horns that have a lower Fc in combination with something like the BMS or B&C DCM50 that are designed to go low. ZXPC provides no real useable data on that horn. Without measuring, there is simply no way of knowing what is going on with that network/horn/driver combination. 33uF will probably prevent the diaphragm from hitting the phase plug, but as far frequency response, distortion, etc., - who knows.
  19. I don’t know enough about titanium diaphragms to be able to tell you at what point it becomes unhappy with you. If it was my set up, I would probably change the 47uF capacitors to 33uF and not drive the system to obscene levels.
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