Considering DIY with old car audio sub

Discussion in 'Archived Threads 2001-2004' started by JasonS, Jul 1, 2002.

  1. JasonS

    JasonS Stunt Coordinator

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    Hey all,

    I've got an old JBL 12in. GT subwoofer, and I'm thinking of using it in a home theater invironment if possible. I downloaded WinISD, and it gave me the following analysis. Excuse my nubie-ness, but would this be good?

    Driver : JBL GT122
    Project by : CN031
    Project for : you
    --
    Number of drivers : 1
    Box type : Vented
    Box size : 2.257 ft^3
    Tuning frequency : 38.05 Hz
    Vent : 1 vent(s)
    7.30 in length for each
    4.02 in round


    Relative
    Freq Gain SPL
    [Hz] [dB] [dB]
    20.00 -22.16 69.84
    25.00 -15.17 76.83
    30.00 -9.70 82.30
    35.00 -5.59 86.41
    40.00 -2.87 89.13
    45.00 -1.36 90.64
    50.00 -0.63 91.37
    55.00 -0.31 91.69
    60.00 -0.18 91.82
    65.00 -0.12 91.88
    70.00 -0.09 91.91
    75.00 -0.08 91.92
    80.00 -0.08 91.92
    85.00 -0.08 91.92
    90.00 -0.08 91.92
    95.00 -0.07 91.93
    100.00 -0.07 91.93
     
  2. Jeff Rosz

    Jeff Rosz Second Unit

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    it models good, it vents good, problem is with an Fs of 33hz it just isnt gonna get down low. you can extend its response with a larger cab but it still wont reach that lowest octave. and it will prob bottom out alot. maybe a lil room gain will help. you can certainly try it, mdf is cheap. would make a nice sub for music, but for HT i'd look for another driver.
     

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