Subwoofer driving

Discussion in 'Archived Threads 2001-2004' started by Willem Vos, Mar 28, 2002.

  1. Willem Vos

    Willem Vos Stunt Coordinator

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    Ok, this is another reassurance-question, here goes:

    I've been trying to get my subwoofer to sound optimally, and I think I've got it.

    In the channel setup of my receiver (Denon 3802) The channel setting for my sub is at +10dB, while the volume knob on the sub itself is set quite low.

    Is this a good way to drive the sub, or is driving it at +10dB too high?
     
  2. jeff lam

    jeff lam Screenwriter

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    You've got it backwards. The sub level output on the receiver should be set at 1/4 to 1/2 and the sub gain/volume knob on the sub itself should be turned up till propper callibration is achieved. That's how most of us around here run it anyway.

    But if it sounds better to you the other way, use your method. That's what it's all about in the end anyway. Whatever sounds best to you.
     
  3. Willem Vos

    Willem Vos Stunt Coordinator

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    Ok, but could you tell me the underlying reason to do it that way (the other way round, I mean)?
     
  4. jeff lam

    jeff lam Screenwriter

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    When you max out the sub level on your receiver you introduce a lot of distortion into the sub signal. By running it at 1/4 or 1/2 the distortion is minimal. It starts to get bad from about 3/4 to max.
     
  5. Willem Vos

    Willem Vos Stunt Coordinator

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    Thanks Jeff.

    I'll try experimenting some more to see if things can be improved.
     
  6. Willem Vos

    Willem Vos Stunt Coordinator

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    Just read this on the SVS website:

     
  7. Pete Mazz

    Pete Mazz Supporting Actor

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    The +2 to +6 they talk about is not a subwoofer level setting, per se. It is how much "hotter" the sub is set compared to a calibrated level.

    In other words:

    If all speakers were calibrated to 75 dB, their sub would register 77-81 dB on a SPL meter (+2 to +6).

    So, if your speakers are all calibrated to the same SPL level, set your Subwoofer Level control on your processor to ~-5, and use your sub's volume control to adjust it's SPL level to calibrate it.

    Pete
     
  8. Willem Vos

    Willem Vos Stunt Coordinator

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    Ah, I see. Thanks, this stuff was getting really confusing.. + this, - that.

    I've calibrated using -6 on the receiver now, let's see if that improves things.
     

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