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Everything posted by Kyle

  1. Kyle

    dB 2.0 launched!

    roger that, I gotta do the mobile css thanks for posting that @dgage
  2. This driver is nuts! I need to see this thing run against the 24vU https://www.harbottleaudio.com/24vu.html
  3. I asked an engineer at JL about 2 months ago for a Gotham... somewhat jokingly (I think its $13,000 or something) negative on that unit so far.
  4. Sure, by no means is this wrong and everything on the y-axis is relative so it does work, just means means its windows to a set of dB that makes sense which is already done. Josh has wanted to add this data to the site for a long time now, maybe its time to get it baked in
  5. I really like this idea and concept of comparing output vs size. I think one shortcoming with this graph is that SPL is on the decibel scale which is not linear, but we can think of box volume as linear. What we should do is convert SPL to Sound intensity (assume sea level for air pressure -- close enough). Once we have a linear scale for output and a linear scale for volume, I think the graph can have more meaning.
  6. Seems reasonable, too much is never a bad thing either, just means it won't clip.
  7. Is there a US distributor for the 214.50 ?
  8. wow! Based on the new sealed system max output tests that Josh just posted it looks like it outright beats the B&C in the midbass region and matches it everywhere else. Both of these drivers are beastly... https://data-bass.com/#/systems/5d02b177d6b2560004ebe49e?comps=5d03f339d349e90004d8fcd5&_k=ok0919
  9. Looks exactly like the older Eclipse Ti subwoofers made by TC sounds, but that Qes is very high so that would be sealed box type of woofer.
  10. Kyle

    B&C 21DS115

    20 is way more than it needs, but keep in mind, the size of the box will help the size of the port. Almost all ported boxes are going to experience compression with enough power. A 20 cubic fox tuned at 20 could have a very large port compared to a box half the size. The hump is going to flatten with compression at higher volume. If you have the space, bigger will be better in this regard, but how much it helps will only show at higher power levels at around tuning.
  11. Make get some ideas from Wisdom,. they specialize in in-wall solutions. TC used to make their drivers for the subs. https://www.wisdomaudio.com/ranges/sub-woofers/
  12. RIP Tom, but this reminded me of his IB https://web.archive.org/web/20120617055921/http://www.nousaine.com/pdfs/Subwoofer that Shook the World.pdf
  13. Normally when subs break things is a resonance dance.
  14. I would like to see the MAUL with 4 K20's on it. We would need a 600 volt feed from the power company at least.
  15. I'm just so picky about Qes, I wouldn't consider the SWR-12D2 for pretty much anything since I like small boxes. I honestly still like the god damn Lab-12C, but it does fall show in xmax. It would have to have more magnet to maintain its SPL / Qes if xmax was to increase. Eminence, give us a Lab-12 Ultra please! 1.8ww coil, 7.5" magnet We had a prototype TC-9 exactly like that (used a 3" coil of course, not 2.5") and that thing hard with 1000 watts - pro cloth surround. About 1.8" long coil -- not expensive by most accounts.
  16. Well, lets ask it this way, will this thing beat 2 Skhorns? Its bigger than 2.
  17. Kyle

    Site bug

    We can handle huge pics now thanks for AWS and image resizing No worries about pics or size of them anymore!
  18. So in terms of this 60 cubic foot Danely sub (a pair at 120 ft cubed) One could create 30 (~4 cubic foot) with just a simple lab-12c driver tuned to 20Hz (or higher if needed) with an effective sensitivity of nearly ~120dB @ 1 watt for the array. Does that beat these horns? I think we have a good fight here... The power advantage is squarely on the horn but if you have the power, I think the ported box array is going to win out in a lot of ways, esp. down low. We need to test this...
  19. omg i forgot about the fan sub! that thing was a best at 10Hz. Ya, small motor force or large cone, struggle to counter the air pressure in the box. Bigger motor = better, but requires more voltage to adjust for the back EMF generally seen with huge magnets.
  20. Those horns look crazy! I respect horns, but at the end of the day, I question the volume SPL trade-off. Not saying they don't help just questioning the amount of gain you get. Josh, what say you?
  21. Puck neo, very efficient. I like the heatsink above the t-toke there. I don't have a lot of puck magnetic simulations but the thing I noticed a lot of those was the behavior of the flux under the magnet. I noticed some of it shorted to the other side of the gap causing a reverse B field. I'm not sure how that plays out in real life but clearly there are plenty of examples. The shorting rings are nice on that motor for sure, and I see that's a pretty tall gap, will be very efficient.
  22. SME, most subs have undersized ports, the box becomes so large (as you know) to get a proper port, most have to by DIY and very large. What we need is to fill the room with argon gas, then the tuning would be awesome!
  23. Kyle

    Site bug

    As you can see, some of our systems have almost 5mb a just graph data, its really data rich! dammit Josh!
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