Dual 18 Inch Ported Subwoofer Box Design

The dual 18-inch ported subwoofer box design provides you with the blueprints to build your own vented subwoofer box. This dual 18-in sub-box design has a volume of 10.40 ft³ and a tuning frequency of 32 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 hello@ctsounds.com.

*Note: All box designs are non-returnable. There is no refund on box designs.