Vortex Speaker Kits

Discussion in 'Home Theater Speaker Kit Information' started by Erich H, Jul 20, 2019.

  1. Here's a quick and dirty moving microphone RTA with an 18db/octave crossover at 80Hz. The orange is after EQ, using a Harman target curve I got from Julian Krause. Nothing final or carefully considered about this, just wanted to experiment with the tonal balance in my DSP.

    Definitely some extra energy from around 120 to 300Hz that was pretty audible but nothing a little EQ couldn't handle. They sound incredibly transparent now.
    upload_2020-4-5_18-1-28.png
     
  2. Hello people

    I have to confess I am usually a forum lurker, but I had to join to primarily commend Erich and Matt for such great work. You are a credit to the world of audio engineering sirs. :)

    I shall certainly be ordering up some Vortex-15s to have a play in the near future. Just curious as to what they would sound like in my living room.

    I am usually a fan of sealed enclosures and I am toying with the idea of building a 2.5 way setup (sealed), but with a second 15” driver to help compensate for the reduced bass output from the sealed enclosure. Can you recommend an eminence bass driver the Denovo Hyperlite 15-8 is most common to so I can try this out? A lot of their 15” products are unsuitable for a sealed enclosure.

    I’ll probably also build a 5 cu ft vented for comparison.

    Anyway, thanks for all of the hard work.

    Best
    P.
     
  3. Matt, would it be possible for you to compare the "HT/HTM sound Vs the Vortex sound? I'm leaning towards 80% music.

    I'm also looking to do a ~2.5 Cu Ft sealed enclosure (apartment/college appropriate playback for a few years, before I can get my own house and setup a sub). I'm not trying to get evicted lmao.

    I calculated an equilateral triangle with a 16.5' wide baffle, made out of .75in stock, has about 2.8 Cu Ft right at 36"-- ear level for the top of the enclosure.

    Think Zu inspired, but a triangle tower instead of a square. Probably gonna make a double thick baffle to give it a really big rounder, that way it doesn't look mega "sharp" in the room
     
  4. #54 Severian, Apr 27, 2020
    Last edited: Apr 28, 2020
    If you're willing and able to build towers, I would recommend going with the full 3.5cuft spec so that you don't have to worry about the upper bass hump that you can see in my response.
     
  5. Honestly I think I want the upper base hump. With that comes great power handling/low average cone movement.

    If I use it to enhance "chest thump" and push it into a subwoofer to get low, it gives the best of both worlds. Atleast that's my theory. It's the "fast bass" above 80hz, 50hz is the beginning for true "bottom end" extension, and 32hz is low with 20hz bring ultra-low.
     
  6. I don't know, I'm a bass freak and I think they sound quite a bit better with EQ to flatten out the hump.

    Of course, there might be less of a hump in a sealed alignment.
     
  7. For music I would go Vortex rather then HTM. The HT/HTM have a slightly drier sound that is better suited for home theater and lack the bass extension the Vortex driver can give in their ported tower alignments.

    I'd generally put bass snappiness and attack in the 80-120hz range and chest thump in the 50-80hz range. You probably don't want a hump in the response like Severian had, that just adds bloat to the lower midrange and muddies things up.
     
  8. I'm planning to buy a pair in about a month, after I sell some others to put towards the purchase.

    How does this cone compare to an oblate spheroidal profile in terms of generation of HOMS?
     
  9. Hi Matt,

    I’m finally ready to build my speaker enclosures for my four vortex 15’s and two vortex 12’s. These are all going to be surround speakers for home theater, could I please get a recommendation for sealed enclosure volumes for the 12 and the 15? I will be crossing them with subs at around 80 hz. These will be built into the walls and ceiling. Thank you!!!
     
  10. How about a pair of the 15"ers in sealed cabinets atop a pair of 18" Ultimax subs (in Sledge enclosures). Crossover b/w the subs and Vortex mains would be handled by a miniDSP SHD.

    Kind of a small-ish high-output stereo setup? Would be used for mostly music but some movies as well.

    -Jim
     
  11. #61 Matt Grant, Jun 1, 2020 at 2:51 PM
    Last edited: Jun 1, 2020 at 2:56 PM
    Sorry for the late reply.

    The Vortex-12 could be used in a 0.8-1.2cuft sealed enclosure though the F3 will end up around 100hz. It could liekly be run at an 80hz crossover with minimal issues.

    The Vortex-15 would do well in 2.5-3.5cuft sealed with an f3 of around 75-80hz.

    -----

    You could certainly put the Vortex-18 on top of some 18" subs like that. It won't be terribly different then a standard 2.1 setup with mains/subs though the miniDSP gives you a little more flexibility in the crossover optimization and EQ which is always good to have.
     

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