Y-Splitter Cable into Sub = 3-10 dB gain?

Discussion in 'Speakers' started by Glenn Verde, Apr 29, 2004.

  1. Glenn Verde

    Glenn Verde Extra

    Feb 10, 2004
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    I read on a internet cable company that using a Y-splitter into the stereo input of a sub instead of a single cable into the mono input could produce anywhere from 3-10dB gain. Is this true or is it a marketing hype. Has anyone done this and noticed an improvement? Thanks.
  2. Edward J M

    Edward J M Cinematographer

    Sep 22, 2002
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    A Y-splitter simply doubles the voltage to the low level sub inputs. Doubling the input voltage yields a 3 dB increase in sound pressure, all other things equal.

    You can accomplish the same thing by upping the sub level 3 dB in the AVR and save $10-$15. :)

    The only time I recommend a Y splitter is if the sub auto-on circuit is sleepy and it needs a bit more juice to stay lit.

    The overall sub level is a function of both the voltage at the input, and the gain setting on the sub amp. A Y splitter cannot "add" power; the sub amp will still be rated the same, no matter which way you slice it. Can't get blood from a turnip, IOW. [​IMG]
  3. John Garcia

    John Garcia Executive Producer

    Jun 24, 1999
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    Once calibrated for SPL, you end up with basically the same thing, though you will likely be able to turn your sub amp's gain down a bit, yeilding slightly more headroom. The only reason I do it this way is for exactly the reason Ed mentions - auto on/off circuitry.

    There is no way a splitter could ever yeild +10dB

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