Performance Optimized Down Fire Wide Sealed 10" Shallow Sub Enclosure Prodigy NB3-10 · Single 10" Sealed enclosure

Because it is only 12 inches deep. The standard Performance Optimized Down Fire platform is 30 wide by 15 deep, and under a rear seat or on a narrow cargo floor there is often not 15 inches to give.

The airspace lost from the depth is recovered from the length, so the cabinet runs 41 inches instead of 30 and stands 6 inches tall, with the same driver specific chamber. If you do have 15 inches of depth, the standard 30 by 15 cabinet is the better pick.

The standard cabinet is 30 by 15 by 6.25 inches and gives the driver 0.76 cubic feet net. This one is 41 by 12 by 6 inches and gives the driver 0.770 cubic feet net. The height was solved to hold the same airspace as the standard box, so the alignment carries over.

The choice is about shape: the standard box if you have 15 inches of depth, this one when depth is the limit and you have 41 inches of run.

No, it is the intended alignment. The NB3-10's stiff suspension, 14.43 liter Vas against a 36.4 Hz Fs, makes sealed alignment a low Qtc proposition in any realistic volume, and at 0.770 cubic feet net this cabinet lands at Qtc 0.525 with Fc at 46.9 Hz and a predicted F3 of 68.1 Hz.

Below 0.707 there is no response peak, group delay is lower and the rolloff eases in gradually. In a vehicle, where cabin gain rises as frequency falls, that gradual rolloff integrates better than a sharper alignment, and in-car response extends well below the anechoic F3.

The NB3-10D4 is a dual 4 ohm driver, so a single unit wires to 2 ohms with the coils in parallel or 8 ohms in series, and the one side-mounted terminal cup carries that load to the amplifier. Prodigy rates it at 600 watts RMS continuous; target 450 to 600 watts RMS. Confirm your amplifier is stable at the load you wire before powering the system.

Side mounted. 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 in its installed position, since the baffle faces the floor. The cup is our Proline X ABS and carbon fiber composite unit, recessed, with stainless hardware, copper ring terminals and pre-wired 12 gauge OFC.

V-groove and dado joinery, CNC cut on ShopSabre routers from Langboard Elite MDF, so every panel joint locks mechanically before adhesive is applied. The front baffle is a 1.5 inch double layer with the outer layer machined as a flush recess, and the driver lands on 8/32 threaded inserts with stainless machine screws. A windowed U-brace ties the long 41 inch panels together. Corners are square, the Down Fire series standard, which keeps the most internal volume for the footprint. Assembled and inspected in Tullahoma, Tennessee.

No. Polyfill is already installed as a light wall lining, and the quantity is chosen so it does not change the acoustic volume. Do not add more: packing a sealed box makes it behave as though it were larger, which walks the alignment away from the 0.770 cubic feet this cabinet was built to.

No. This listing is for the enclosure only. Bring your own Prodigy NB3-10D4; the driver is purchased separately. The cutout and mounting depth are direct fit, and the 1.75 inch feet ship uninstalled for an installed height of 7.75 inches.