Need help please with box ports..

[busapro1983]

hello i have 2 Soundstream X3-182 i built a box that is....

25 height

49 width

22 depth

i want to go areo ports round ports can anyone help me with the port size and info please too get 33hz

this is the subs info if you guys need it..thank you very much..

Subwoofer Specifications

Subwoofer Size 18"

Peak Power Handling 11000 watts

RMS Power Handling 7000 watts

Voice Coil(s) Dual

Impedance (Per Voice Coil) 2 ohms

Voice Coil Diameter 4"

Sensitivity 92.9 dB

Xmax (millimeters) 20 mm

Subwoofer Design Round / Circle

Main Cone Color Black

Woofer Composition Paper

Woofer Surround Foam

Recommended Enclosure Specifications

Recommended Enclosure Type Ported / Vented

Minimum Ported Box Volume 4.00 cubic feet

Optimum Ported Box Volume 6.00 cubic feet

Maximum Ported Box Volume 8.00 cubic feet

Top-Mount Depth 10"

Cutout Diameter 16.75"

Electromechanical Parameters

Free-Air Resonance (Fs) 32.68 Hz

Equivalent Compliance (Vas) 2.401 liters

Total Speaker Q Value (Qts) .419

Electrical Q Value (Qes) .454

Electrical Resistance of Voice Coil (Re) 3.83 ohms

Mechanical Q Value (Qms) 5.456

Click to read more...

 

[Polar]

(2) 8 inch ports 12 inches long will get you 33 hz

 

[JoshC 10+ year member]

(2) 8 inch ports 12 inches long will get you 33 hz

That's 33hz with 8sq in of port per... That's going to be port noise out the ***. You need atleaste 12.5 inches per cube.

Two 10in tubes 27in long would be 33@15sqin per. Or three 8in tubes 24in long is 33.5@14sqin

 

[busapro1983]

so am get crazy port noise whats the best to do then for no port noise??

 

[busapro1983]

so is the box too small??whats the best way to do the ports so i dont get crazy port noise...thanks for your time..where do i buy thouse ports