Quad subs

Discussion in 'Home Theater and Stereo' started by CJ, Aug 12, 2018.

  1. DYohn

    DYohn Bronze Member Donor Top Poster

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    Education about audio and understanding how it works is a good thing.
     
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  2. CJ

    CJ Bronze Member Admin Top Poster

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    Agree. I'm still evaluating but I have some initial impressions.
     
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  3. Mike B

    Mike B Well-Known Member Donor Top Poster

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    I agree. You make the system sound better and the curves show you why it sounds better.

    I also like that below 20 Hz boost. You can't hear it, so it's not "boomy" but you can feel it and I image you do when T-rex walks - :)
     
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  4. pillatier

    pillatier Well-Known Member

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    I bet you will do a lot more tweaking before settling in. Then re-tweak again after you get accustomed.

    I occasionally re-tweak my setup in an attempt to improve - but end up going back to my current settings. I guess I have achieved my listening nirvana.
     
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  5. RJ

    RJ Member

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    I don't have any experience with graphing out speakers. I assume the perfect scenario would be a flat line running 20hz to 120hz around 77-78dbs then starts dropping off?
     
  6. DYohn

    DYohn Bronze Member Donor Top Poster

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    Yes, and that sort of curve does not exist in the real world. :)
     
  7. pillatier

    pillatier Well-Known Member

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    Hair brain idea - what if one of the four subs is run 180 degree out of phase, will that help cancel the dips?
     
  8. CJ

    CJ Bronze Member Admin Top Poster

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    I played a bit with the phase dials on the SVS subs but so far it seems like the best results are simply having the subs running at 0 phase but at the locations noted in the video. I'll shoot another video soon laying out what I've done but I am waiting for a part.
     
  9. DYohn

    DYohn Bronze Member Donor Top Poster

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    Realizing of course that distributed placement creates sound waves with different relative phases to each other at the listening location, which is part of why multiple subs generally creates a much more even sound field than only one.
     
  10. CJ

    CJ Bronze Member Admin Top Poster

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    Exactly. They are already "out of phase" when all set to zero.
     
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  11. GHilinski

    GHilinski Well-Known Member

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    if you do want to play around a bit with the settings, music stores sell these little tape arrows that will not mar the surface that they are stuck to. If you mark them and begin to fiddle, you can always get back to your original settings. Guitar tech's use them all of the time to mark settings on amp and effects pedals because they are constantly tweaking settings.....sound chasing...
     
  12. Barry_NJ

    Barry_NJ Well-Known Member

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    I stumbled across the videos on YouTube last night, good stuff!
     
  13. CJ

    CJ Bronze Member Admin Top Poster

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    I'm trying to post a final video for the series summing things up. I need a camera operator and have been unable to wrangle one of my older two. Hopefully the next couple of days.
     
  14. CJ

    CJ Bronze Member Admin Top Poster

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    I'll post some final thoughts in writing and acknowledge this video is a little rambling but here's the final verdict.

     
  15. Rick C

    Rick C Active Member

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    CJ glad it worked out so well for you. I enjoyed the video!
     
  16. CJ

    CJ Bronze Member Admin Top Poster

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    I posted in the Rampage thread but thought I'd update here too. The QUALITY of bass I'm getting is absolutely insane.

    I never watched Rampage with the single sub so I cannot speak to how much of it is just the soundtrack of the movie but I will say, I've now had two "top five" LFE experiences since getting the SVS subs dialed in. That seems statistically improbable if its just picking some really top LFE movies the past couple of weeks. I mentioned in the Final Verdict video that Guardians 2 fell into that bucket and hearkened back to a few years ago when Mad Max: Fury Road was one the best home theater / LFE experiences I'd ever had. Not withstanding the quality of the movie, Rampage fits that bucket as well.

    If this is the "new norm" I've achieved it further reinforces the decision and justifies the not-insignificant money as well spent.
     
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  17. DYohn

    DYohn Bronze Member Donor Top Poster

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    That's great to hear CJ. Four subs is IMO the optimum setup, and sealed systems are a lot easier to control. Congrats on a successful experiment.
     
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  18. GHilinski

    GHilinski Well-Known Member

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    Yeah...last night Sunfire go boom. Got 15 years out of it and may try to get it fixed. Large humming noise. Will deal with it this weekend. I also think i have a bad solder joint on one of the sub outs on the Rotel. Oh and my tv is showing stars on the screen. Bad chip but can be replaced easily.

    When it rains, it pours.
     
  19. CJ

    CJ Bronze Member Admin Top Poster

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    Holy smokes, that's a lot to go wrong. One thing I'm probably not nearly grateful enough for (when its absent I guess you don't notice) is that my system has ZERO noise. No hum, no buzz, no shhh.
     
  20. pillatier

    pillatier Well-Known Member

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    A good excuse to buy a new amp.. Emotiva perhaps DY speaks highly of them.
     

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