Professional Series Ported 15" Enclosure Prodigy Audio NB5-15 · Single 15" Ported enclosure

The port on this box stays clean up to 851 W before the mouth velocity crosses the chuff threshold, against the coil's own 1200 W power rating. Prodigy publish Xmax on a 70 percent BL basis for this driver, and the excursion check behind this build derates that figure further rather than taking the spec sheet number at face value. Ripple across the passband holds at 1.55 dB, and the in-car curve stays tight across the passband rather than peaking at either end. Tuning is chosen for in-car response rather than an anechoic curve: a vehicle adds roughly 12 dB per octave below about 45 Hz, and this tuning is where that sum comes out flattest across 25 to 60 Hz.

The box. A Performance Optimized cabinet is cut to fit a trunk shape on a 1.5 inch double baffle; this one is a full-size front-firing box on a 2.25 inch triple baffle with the woofer flush-mounted in the outer layer, Prodigy logo acrylic, and a port checked at 1800 W rather than the rating. It carries a 2 year warranty against 1.

Threaded insert kit included for customer installation: 8 to 12 inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, allen key and gasket tape. One kit serves one woofer; a dual cabinet ships two.

Yes, at 26 Hz, 24 dB per octave. Below tuning a vented box stops loading the cone and excursion runs away toward DC. With the filter in place this cabinet puts the Prodigy NB5-15 at 47 percent of its usable travel at 1800 W.

Not one we can show you. We do not build a sealed enclosure for the Prodigy NB5-15 and Prodigy publish no sealed volume for it, so the Performance Graphs tab carries no ported-versus-sealed chart: the only sealed box left to plot would be this cabinet stuffed and sealed, which nobody would build, and a comparison against it would tell you nothing you could buy. What a vented box gives up is the region below tuning, where the cone unloads and the 26 Hz subsonic filter takes over; around 33.0 Hz the vent carries the load and cone travel drops to its minimum, which no sealed alignment can do.

It is a vertical slot beside the woofer, 48.0 square inches, tuned to 33.0 Hz. The port stays under the chuff threshold up to 851 W; above that the air at the mouth moves faster than the 17 metres per second where a slot starts to chuff.

85 lb, 32.00" W x 17.50" H x 19.00" D external. It ships as a UPS parcel; the price includes shipping in the 48 states. Do not add polyfill; it ships dry on purpose.

No. This is an enclosure only, cut for the Prodigy NB5-15 specifically: the 13.750 inch cutout and the 9.750 inch mounting depth allowance come from Prodigy's published parameters. Bring your own driver.