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Get familiar with the reaction system: Introducing the Reaction System

Would there be any love for these?

GowaGowa
edited January 2019 in DIY
7'' nominal

Re = 6.6 Ohms

fs = 50.49 Hz

Sd = 131  cm²

Qms = 4.982

Vas = 16 L

n0 = 0.40 %

Mms = 16 g

Qes = 0.551

Cms = 0.60 mm/N

Zmax = 66.72 Ohms

Qts = 0.50

Le = 0.131 mH

BL = 7.79

SPL = 89 dB 2.83v/M

Comments

  • jr@macjr@mac
    It models very interestingly in vented 30L, very very interesting. Reminiscent of how well-designed small diameter woofers model. Medium Q, low compliance = vented F3 below the driver resonance.

    What is the cone material?
    I have a signature.
  • GowaGowa
    It looks like a take on the KVC Kevlar. Very similar, but with Bimax spider and a frame similar to Wavecor. 182 mm
  • jr@macjr@mac
    Yep, model it with 0.5 ohm series resistance, in 30L, tuned to 35Hz, QA: 80, QL: 50, Qp: 90.

    Mmmmm hmmmm....
    I have a signature.
  • GowaGowa
    I don't know how many he has or if they are worth getting.
    PWRRYD
  • GowaGowa
    edited January 2019
    I think I can get these pretty cheap if anyone is interested.
  • ScottSScottS
    I agree with JR, those parameters do look pretty good.  Decent efficiency and extension without extreme cone unloading below resonance.  In about a cubic foot (28L), F3 will be in the mid 30's.  One could go down to about 20L and still get F3 at 40 Hz tuned to 42 Hz with a gently peaking response that in my experience would still sound good.

    A pair in parallel in about 2 cubic feet would be a pretty stout bottom end for a small floorstander (MTM or 3-way).
    Gowa
    Keep an open mind, but don't let your brain fall out.

    Sehlin Sound Solutions
  • GowaGowa
    edited January 2019
    Measured out of the box.


    dcibelkennyk
  • kennykkennyk
    I'm liking these the more data I see.
    ............. could you hum a few bars.
  • GowaGowa
    They might be interesting to play with.
    kennyk
  • GowaGowa
    I'm wondering about that dip around 800 Hz. It looks a bit funky to me, but the price is awesome for playing around. ($28) I asked him to put some aside in case someone here wants to play with them.
    kennykjr@mac
  • GowaGowa
    All gone. A local dude took all 16. :)
    kennyk
  • kennykkennyk
    WOW!
    ............. could you hum a few bars.
  • GowaGowa
    I snagged a few more of these. If anyone's interested.
    https://rhythmaudiodesign.com/collections/special/products/r182-kmo-08v-coated-kevlar-7-woofer
  • jr@macjr@mac
    Man, that's a good deal. Wish I was in purchase mode.
    rjj45
    I have a signature.
  • GowaGowa
    Ya, they're selling out fast and I haven't even picked them up yet.
    rjj45
  • rjj45rjj45
    Excellent price. Still working on downsizing my inventory of Rival 176
    But Chahly - Stahkist don't want speakers that look good, Stahkist wants speakers that sound good!
  • kennykkennyk
    I'm late again....…….must be a sign.
    ............. could you hum a few bars.
  • GowaGowa
    kennyk said:
    I'm late again....…….must be a sign.
    I'm not sure how many he has left. I'll be there tomorrow and have a look.
  • GowaGowa
    I just picked up a few more.
  • PWRRYDPWRRYD
    Jump Kenny Jump!!!!
  • kennykkennyk
    I would like a quad.
    ............. could you hum a few bars.
  • GowaGowa
    Too late Kenny.
  • kennykkennyk
    It's a sign I tell you.
    ............. could you hum a few bars.
  • GowaGowa
    I'm pretty sure we sent you an email when we got them.
  • kennykkennyk
    Gowa said:
    I'm pretty sure we sent you an email when we got them.
    You hit it on the nail, I just didn't check my emails. I fugged up.

    ............. could you hum a few bars.
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