Pairing SVS 20-39CS with 20-39CS+

Discussion in 'Archived Threads 2001-2004' started by ShalM, Mar 3, 2002.

  1. ShalM

    ShalM Extra

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    Hi,

    Just curious if this would be a good idea or it would backfire in any respect. Ofcourse having 2 CS+ would be ideal but if one already has a original CS, would it hurt to have two subwoofers of different kind. I would assume that since they are tuned to same frequencies, it shouldnt have any negative repercussions. What do the experts think ?
     
  2. Ned

    Ned Supporting Actor

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    I've been thinking about this since I'll have a similar setup soon.
    The one foreseeable issue is that the CS unit will reach its limit before the CS+ does so depending how loud you play movies, you may need to calibrate for this situation.
    Basically, the key would be to set the CS unit at a lower input level so that with a certain extreme level of bass, both units would "bottom" at the same input.
    If you set both units to the same input, the CS will bottom at say 105db whereas the CS+ would probably bottom at 110db. So at anywhere from 105-109db, you would have one sub outputting junk since its bottoming out, and one sub still playing cleanly.
    Of course with dual subs, you would need a large listening area and a very loud/low amount of bass for any of the above scenarios to happen. Dual CS subs already give incredible amounts of bass, the extra output of the CS+ is just that much more clean headroom.
    In general most people would probably not need to worry about the calibration offset as the duals put out enough as is. Just depends if your normal or subhuman [​IMG]
     
  3. ShalM

    ShalM Extra

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    Thank you for the excellent explanation of what to expect.
     
  4. SVS-Ron

    SVS-Ron Screenwriter

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    Shal,

    A good, if rough way to pair these two subs together is simply to place them side by side and then calibrate them one at a time.

    If you watch movies say -6 to -9dB from reference level for instance (a common level) using a sound meter and test disk as your measureing tool, then I'd simply calibrate the CS-Plus about +3dB over the mains, and the CS about the same as the mains. One at a time. This will give you a nice overall bump in the low bass but it will allow the CS-Plus to operate more or less in the same range (in terms of capacity) as the CS.

    Then when you raise or low the subwoofer level with your receiver to suit your tastes (or to compensate for reference level demos, at which point you might drop the subs a dB or two)they'll move the same relative to each other.

    Again this is just a rough idea of how to play to the two subs different levels of max output.

    Ron
     
  5. Robin Casady

    Robin Casady Agent

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    After reading the FAQ on which size to buy, I was wondering why wouldn't it be good to pair a 16-46 with a 25-31? It would seem that one would give you the low-end of the low-end and the other would give you the high-end of the low-end. But things often don't work as one would think they should. [​IMG]
     
  6. Steve Stogel

    Steve Stogel Supporting Actor

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    Robin, this has been covered quite a few times before. Perhaps do a title search for "mixing" and "SVS"? The short answer is that mixing is not really recommended. It's just harder to get them on the same page, so to speak. While it seems that a 46 and a 31 would be the best of both worlds, the common response here is that you're much better served with two 39s, for instance. It just makes calibration easier, and you probably get at least the same extension/output, and it's just easier to integrate into your system. Mixing the two would be like getting two different brands of subs (albeit really good subs) to integrate well into your system. It's not impossible, but it's a lot easier to integrate matching subs than mismatched subs. Looks like my short answer was quite a bit longer than I had expected, but there's the medium answer, I guess [​IMG].
    Steve
     

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