Question about subs and dB's...

Discussion in 'Archived Threads 2001-2004' started by Peter Johnson, Jul 19, 2001.

  1. Peter Johnson

    Peter Johnson Stunt Coordinator

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    I was always under the impression that a doubling of power = 3dB, so why do some people (such as Tom N and Tom V) say adding say another identical sub = a 6dB boost?
     
  2. Patrick Sun

    Patrick Sun Studio Mogul

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  3. Mario_C

    Mario_C Stunt Coordinator

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  4. Glen_L

    Glen_L Stunt Coordinator

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    If you were to double the power to a single driver, you would gain the 3dB. Adding a second driver (with the same wattage) has the potential to add 6dB. This is one of the reasons you try to keep both subs in the same corner--to keep the subs "in phase" together, or phase correlated. If I recall correctly, two out of phase sounds of the same loudness result in only a 3dB increase.
    edit: Here's a quotation from the second link that Mario provided above:
     

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