Single 18 Inch Ported Subwoofer Box Design - CT SOUNDS

Single 18 Inch Ported Subwoofer Box Design

Regular price 91% OFF Before: $49.99 Sale pricePrice: $4.44

The single 18-inch ported subwoofer box design provides you with the blueprints to build your own ported subwoofer box. This single 18-in sub-box design has a volume of 5.25 ftand a tuning frequency of 32 Hz. Dimensions: 34" x 29.5" x 14".

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

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

Customer Reviews

Based on 12 reviews

Perfect sound


Perfect just show a 18in box for aero port

C.S. (Memphis, TN)
Excellent SQ Enclosure

Great SQ Enclosure.... it hits the highs and LOWS equally. It doesn't seem to really peak at any one frequency, even where it is tuned to. This design requires only one sheet of any 4" x 8" material you decide to use and will fit in most medium sized trunks with an opening of 17" or greater.

Tavares W. (Blytheville, AR)
18 Inch Ported Enclosure

Box hits pretty good. My friend and I used this design after his brother built one from speaker box lite which didn’t sound good at all. This one here hits just right. Speaker breathes good and the lows are nice

Rich R. (Mastic, NY)
18 inch single box plans

Very happy with the design if you are looking for a great box that can be built for under $100 dollars these designs are for you. Don’t get crazy spending all your money on a box built by someone else take pride and build your own