Dual 15 Inch Ported Subwoofer Box Design - CT SOUNDS

Dual 15 Inch Ported Subwoofer Box Design

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

The dual 15-inch ported subwoofer box design provides you with the blueprints to build your own ported subwoofer box. This dual 15-in sub-box design has a volume of 7.00 ftand a tuning frequency of 31 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.

Port Size: 18.5” X 3” X 14.5”

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

Customer Reviews

Based on 14 reviews
Russell P. (Dickson, TN)
Woke my meso 15s up

Gets low. Easy to follow plans.


Easy to follow building directions

James b. (Garland, TX)
$5 cut sheet

2 deaf bonce mf-15r's on a 5k doing a 147.7 with this box design. Added a double baffle and made the box 4in taller and 4in narrower to fit the car.

John M. (Garland, ME)
Dual 15's ported

Great design. I run 2 audiopipe bdx15d2's with 2 audiopipe 1800w amps and she F'N slams. Well worth 75-100 bucks and they sold the cut sheet,exploded view,all measurements. Couldn't be easier. Mines tuned to 30-31 hz and rattling my truck loose. Might have to see what they can do for 4-14's next

Scott M. (Catlettsburg, KY)
Great design

I have bought box build designs off line before and thought if the person selling had been dropped on their head. $5 for quality online blueprint/design. Most ppl charge $80+ for some totally useless designs.
100% real. I've built 2 dual 15" boxes stacked from these. They are the best design/online blueprints yet, can print them out, enlarge. So happy I happened upon ctsounds.com truly amazing quality