Dual 8 Inch Ported Subwoofer Box Design

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The dual 8-inch ported subwoofer box design provides you with the blueprints to build your own ported subwoofer box. This dual 8-in sub-box design has a volume of 1.50 ft3 and a tu ning frequency of 35 Hz. A PDF of the blueprint (box design) will be emailed in less than 30 minutes after you order. If you don't receive it, please check your spam folder or contact us at [email protected]. *Note: All box designs are non-returnable. There is no refund on box designs. Show more