A Custom Build is a Proline X enclosure that exists because a listed box would not fit. Someone brought us a driver and a space, and neither matched a series table: a trunk floor with a fixed footprint, a width limit that leaves no room for a front port, a pair of woofers that had to fire up.
Each one is solved the same way as a catalogue cabinet. The net volume, the alignment and the port come from the driver's published parameters, and the result is checked for port air speed and cone travel at the driver's rated power before anything is cut. What changes is the envelope: the outside dimensions come from the space, and the layout is drawn to suit it.
The datasheets below are builds we have finished. They are here as reference, with their real dimensions, airspace and tuning, so you can see what was done for a space like yours. Any of them can be built again, mirrored or adjusted. To start one of your own, see how we design custom subwoofer boxes, then send us the driver and the space.
