Freq Response in the effects of SS filter in SVS

Discussion in 'Speakers' started by MingL, Apr 13, 2003.

  1. MingL

    MingL Stunt Coordinator

    Joined:
    Mar 26, 2003
    Messages:
    214
    Likes Received:
    0
    Just to see what happens, I decided to chart my FR of my port-plugged 16-46PC+ against the various settings of the SS filter.

    YMMV, but might be useful info for some.

    As expected, a plugged 16-46 did give extension down to 12hz.

    At other SS settings, the response expectedly flattened out, and bass extension reduced. Nothing special here.

    [​IMG]
     
  2. Richard Little

    Richard Little Stunt Coordinator

    Joined:
    Jun 20, 2003
    Messages:
    105
    Likes Received:
    0
    Thanks MingL. This is something that I was very interested in. You would not believe how many serch words I tried and days spent before I found this thread. The magic word was "plugged"
     
  3. MingL

    MingL Stunt Coordinator

    Joined:
    Mar 26, 2003
    Messages:
    214
    Likes Received:
    0
    Hey, an April thread is ressurrected!

    Yep, did that many moons ago, but will be willing to revisit that if any issues arise. Thats measured in my room and listening spot. Again your mileage my vary.

    Incidentally, I'm running my 16-46 PC+ port unplugged at 16hz SS filter. I feel its fine enough for me, but I'm thinking of getting another 16-46PC+ to run duals after realising there so many movies that extend way below 16hz.[​IMG] But that will be later.

    Let me know if there anything I can help.
     
  4. Mitch E S

    Mitch E S Stunt Coordinator

    Joined:
    Apr 6, 2002
    Messages:
    87
    Likes Received:
    0
     
  5. LanceJ

    LanceJ Producer

    Joined:
    Oct 26, 2002
    Messages:
    3,168
    Likes Received:
    0
    How many movies have
     
  6. Zack_R

    Zack_R Stunt Coordinator

    Joined:
    Nov 4, 2002
    Messages:
    220
    Likes Received:
    0
    Ming,

    I'd be curious to see the frequency curve with no ports plugged and the SS set to 12Hz, overlayed on the same graph.
     
  7. MingL

    MingL Stunt Coordinator

    Joined:
    Mar 26, 2003
    Messages:
    214
    Likes Received:
    0
    I've done the no port plugged, 12hz SS. Didn't like that since it bottomed out my PC+ easily.

    On SW2:AOTC Cavalcade THX trailer, I could easily bottom out the SVS with 12hz ss none plugged.

    16hz SS unplugged made my sub rather resistant against bottoming out. Its the sub unloading itself thats causing the bottoming out.

    Anyhow, I'll try to put up a couple of charts with even more variations on my 16-46 PC+.

    Let me count the ways:
    1) No ports plugged, varying SS filter
    2) 1 port plugged, varying SS filter (done)
    3) 2 port plugged, varying SS filter.

    Stay tuned.
     
  8. Richard Little

    Richard Little Stunt Coordinator

    Joined:
    Jun 20, 2003
    Messages:
    105
    Likes Received:
    0
    1) 0 ports plugged, 16hz SS filter
    2) 1 port plugged, 12hz SS filter
    3) 2 port plugged, ? SS filter

    1) and 2) overlayed on the same graph with the gain remaining constant or variable?
     
  9. MingL

    MingL Stunt Coordinator

    Joined:
    Mar 26, 2003
    Messages:
    214
    Likes Received:
    0
    I might have do this measurement over the weekend, so hang on tight if you don't see the graph soon.
     
  10. Jeremy Stockwell

    Jeremy Stockwell Supporting Actor

    Joined:
    Aug 9, 2001
    Messages:
    608
    Likes Received:
    0


    Check this thread for a few visual examples courtesy of MingL. In this same thread is a link to SVS's charts of movies with deep bass.

    More are coming out all the time. To keep up, you need a SERIOUS subwoofer!

    JKS
     
  11. Carlo Medina

    Carlo Medina Executive Producer

    Joined:
    Oct 31, 1997
    Messages:
    10,447
    Likes Received:
    647
    You guys suck. I just finished upgrading my mains, center and receiver and now I'm getting an itch to upgrade the sub now! [​IMG]
     
  12. MingL

    MingL Stunt Coordinator

    Joined:
    Mar 26, 2003
    Messages:
    214
    Likes Received:
    0
    [​IMG]

    A little treat of info.


    Here we have the red curve representing 16hz SS with no ports plugged.


    The magenta curve represents 12hz SS with 1 port plugged.

    The yellow curve represents the THD testing in my setup using a tone at 12hz. The higher order harmonics registered 2.3% THD at -10db ref.

    The curves are measured with my BFD. The above curves are measured at -10dB from ref, which is my usual listening levels.

    IMO, I would say setting the sub for 12hz tuning would be suitable for serious music listening, at least in this setup.

    Hope this data is useful.
     

Share This Page