How Deep Should Port Be

[ken2516 10+ year member]

I Have A Box That 20 Inch Tall 20 Inch Depth And 43 Long The Port Whole Is Three Inch Wide And 16 Inch Deep Leaving Four Inches From The Back Is This A Good Box For A Set Of 15 Inch Subs They Say The Subs Need 3.0 Cubic Ft.i Have A Set Of Xd By American Bass 700rms Each Power By Autotek Sm1500 A/b Class.is This Right Set Up

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[Digital Designs 10+ year member]

I Have A Box That 20 Inch Tall 20 Inch Depth And 43 Long The Port Whole Is Three Inch Wide And 16 Inch Deep Leaving Four Inches From The Back Is This A Good Box For A Set Of 15 Inch Subs They Say The Subs Need 3.0 Cubic Ft.i Have A Set Of Xd By American Bass 700rms Each Power By Autotek Sm1500 A/b Class.is This Right Set Up

That box is tuned pretty low(like 26-27hz) and is about 7.5 cubes.

 

[ken2516 10+ year member]

Thanks So Each Sub Get Right Over 3.0 Cubic,now My Problem Is Amp I Got Wrong One