Performance Optimized Down Fire Wide Sealed Dual 10" Enclosure Prodigy NB2-10 · Dual 10" Sealed enclosure

Because it is only 12 inches deep. The standard Performance Optimized Down Fire platform is 30 wide by 15 deep, and this application needs a cabinet that fits a space three inches shallower than that.

The airspace has to come from somewhere, so the cabinet runs 41 inches long instead of 30 and stands 7.75 inches tall, with each driver still in its own chamber. If you have 15 inches of depth, the standard cabinet is the pick; if your space is long and shallow, under a rear bench or on a narrow cargo floor, this is the shape that fits.

The standard cabinet is 30 x 15 x 7.25 inches and gives each driver 0.412 cubic feet net, which lands at Qtc 0.861 and F3 48.9 Hz. This cabinet is 41 x 12 x 7.75 and gives each driver 0.521 cubic feet net, Qtc 0.801 and F3 47.9 Hz: better damped and about a hertz deeper. Beyond that the choice is about shape: the standard box needs 15 inches of depth, this one needs 12 inches of depth and 41 inches of run.

Each chamber matches the airspace of our standard dual NB2 cabinet. At 0.521 cubic feet net per chamber: Qtc 0.801 with Fc at 53.4 Hz and a predicted F3 of 47.9 Hz. That is above the 0.707 reference, a firmer corner with a little less damping.

Those are anechoic figures. Firing into the floor, the sealed rolloff meets rising cabin gain, so in-car response runs deeper than the numbers above.

One side-mounted Proline X terminal cup with a single pair of posts, pre-wired in 12 gauge OFC to both driver positions in parallel. You do not wire the two chambers separately at the amplifier.

Final impedance is set at the drivers. Each NB2-10D4 has dual 4-ohm voice coils; wire both drivers identically and confirm the resulting load against your amplifier's minimum stable impedance. Set gains for 250 to 350 watts RMS per driver.

Because two drivers in a shared sealed volume interact acoustically. Each driver's compression phase becomes the pressure the other works against, which smears transients. A full-height bonded 3/4 inch MDF divider eliminates that and gives each NB2-10D4 its own 0.521 cubic feet net and its own polyfill.

Side mounted, and there is one cup serving both chambers rather than one per chamber. Every Proline X Performance Optimized enclosure uses a side mounted terminal cup, and on a down fire cabinet that keeps the connection accessible with the enclosure installed, since both baffles face the floor. The cup is our Proline X ABS and carbon fiber composite unit, recessed, with stainless hardware, copper ring terminals, and 12 gauge OFC pre-wired to both driver positions in parallel.

V-groove and dado joinery, CNC cut on ShopSabre routers from Langboard Elite MDF. Every panel joint is a machined interlocking groove that mechanically locks the panels before adhesive is applied, which keeps both chambers airtight under sustained pressure cycling. Corners are square, the Down Fire series standard, with no radii.

The front baffle is a double layer at 1.5 inches, with the outer layer machined as a flush recess so each driver bolts to the inner layer. A full-height bonded 3/4 inch divider separates the chambers and ties the front and rear walls together across the 41 inch span. Polyfill is installed as a light wall lining. Assembled and inspected in Tullahoma, Tennessee.

No. This listing is for the enclosure only. Bring your own pair of Prodigy NB2-10D4 subwoofers. The cutouts and mounting depth are cut specifically for this driver at both positions.