How the space match works

SoundQubed’s spec sheets list net internal volume — the air the woofer actually sees. The box you build has to be bigger than that, so we add back what the finished enclosure takes up:

• Woofer displacement — estimated from cone area and mounting depth.
• Port — about 20% of net volume for a ported box (nothing for sealed).
• Bracing & glue blocks — about 3%.

Your airspace is split evenly across the number of woofers you choose, then compared with each woofer’s recommended gross range. Fits means it lands inside; Room to spare means your box is larger than the top of the range (a divider or smaller box will fix it); Too tight means it won’t make the bottom of the range.

Published T/S figures are as printed on the SoundQubed series spec sheets. Always confirm final box dimensions with design software before you cut wood.

Box design software

Want to model the exact box? Plug the T/S parameters (toggle them on above) into one of these:

Still not sure? Ask our tech team — tell us the vehicle, the space and the amp, and we’ll point you to the right woofer.