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box port tuning

Discussion in 'Subwoofer Box and Custom Fabrication' started by connerray2010, Sep 6, 2010.

  1. connerray2010

    connerray2010 Full Member

    Rockford fosgate p3d212
    Size 12"
    Impedance Dual 2-Ohm
    Power Handling 500 Watts RMS
    1000 Watts Max
    Voice Coil Diameter 2.5" 4-Layer
    (6.35 cm)
    Magnet Weight 102 oz. double stacked
    Speaker Connector Dual 10 AWG compression
    Fs (Hz) 27
    Re (Ohms) 3.30
    Le (mH) 3.6
    Qms 7.00
    Qes 0.52
    Qts 0.48
    Vas (Liters) 43.9
    Sd (cm2) 500
    SPL (dB @ 1w/1m) 85 dB
    Xmax (mm) 16.2
    Woofer Displacement 0.094 cu. ft.
    (2.66 Liters)
    Cutout Diameter 11.25 in.
    (28.58 cm)
    Mounting Depth 6.75 in.
    (17.15 cm)

    Hey can some one help me with this one? I'm wanting to do a bandpass box and I already have my planes drawn out and I'm get .94 cubic feet for interior volume. I'v whent to a port caculator and put my box volume, fs (27 hz), and port diameter (3", 4", and 8"and it tells me my port needs to be 100 and some odd inches. so some on plz help me (i cant find no were recomended box volume for sealed or ported) :huh:
    thanx
     
    connerray2010, Sep 6, 2010
    #1
  2. TheViking

    TheViking Well-Known Member

    Are you referring to a true bandpass enclosure or a more basic vented box? The reason i ask is due to the fact that if it is a bandpass enclosure, and especially if its a single reflex design, then port tuning would be much higher than the 27Hz you have indicated.
     
    TheViking, Sep 6, 2010
    #2
  3. connerray2010

    connerray2010 Full Member

    well what is a good tuning for 2 p3d212's in a dual chamber bandpass box with .94 cf in each chamber but the chambers are conected with a 3"x15"x10" chamber (3 wide, 15 tall, and 10 long)
     
    connerray2010, Sep 6, 2010
    #3
  4. connerray2010

    connerray2010 Full Member

    Can some one help me here?
     
    connerray2010, Sep 7, 2010
    #4
  5. TheViking

    TheViking Well-Known Member

    so...each woofer sees .94 cubic feet both sides.....or is it BOTH woofers share the .94 cubes each side...this is critical to know.
     
    TheViking, Sep 7, 2010
    #5