Sub EQ....Wayne?

Discussion in 'Speakers & Subwoofers' started by Gary Thomas, Nov 17, 2003.

  1. Gary Thomas

    Gary Thomas Second Unit

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    Finally getting around to EQ'ing my sub in my new basement set up. A couple of questions:

    1. Should I disconnect all speakers w/ the exception of the subwoofer? I initally took readings with all speakers active. (This may explain the drop off at 80hz, 89hz & 100hz.)

    2. I took the readings from about ear level from a spot between the two main listening seats. Should I take the readings from various spots & average the results?

    I have an SVS Ultra (original model). It is calibrated +2 over my other speakers. It does bottom out on some high volume demo material, such as the plane crash from Fight Club and some of the THX intros.

    Here's my initial readings from 17.5 to 100 (adjusted for the Radio Shack sound level meter):

    83.5
    86.5
    84.5
    79
    78.5
    81
    83.5
    89.5
    81
    78.5
    79.5
    81.5
    79.5
    71.5
    69.5
    72


    I'm thinking I should cut the following frequencies: 17.5, 20, 22, 40, 63, & 72. Any other thoughts?
     
  2. Brian L

    Brian L Cinematographer

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    I will fill in for Wayne until he gets here....

    1. I would think to EQ the sub,it should be the only speaker playing. That's how I did mine.

    2. There is only one correct spot to EQ a sub; thats your prime listening spot (THE SWEET SPOT). Anything else is a compromise. I put my meter where me head/ears would be in the prime spot (center of my couch).

    Having said that, you can do what you suggest (multiple readings, averaged), but both seating positions will now be compromised.

    Wayne will have much better suggestions on the actual EQ numbers, but I would probaby start be taking down the peak at 86.5 and 89.5, and see what that leaves you. Besides those, you really don't have too bad a set of readings. I am assuming the top group are the result of the roll off of the crossover.

    BGL
     
  3. Wayne A. Pflughaupt

    Moderator

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    Gary,

     
  4. Zack_R

    Zack_R Stunt Coordinator

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  5. Gary Thomas

    Gary Thomas Second Unit

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    Thanks Wayne & all:

    Here's what I did:

    Freq Fine Gain Band
    20hz 0 -5 10
    25hz 9 +5 12
    40hz 1 -6 5
    63hz -9 +4 5
    100hz -6 +16 10

    And here's the results:

    80.5
    80
    81.5
    83
    83
    81
    80.5
    80.5
    80.5
    81
    80
    81
    80
    79.5
    75.5
    71.5
     

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