Performance Optimized Down Fire Wide Sealed Dual 10" Shallow Sub Enclosure Alpine RSW10 · 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 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 7 inches tall, with each driver in its own separate 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 7.4375 inches and gives each driver 0.50 cubic feet net. This one is 41 by 12 by 7 inches and gives each driver 0.505 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.

In 0.505 cubic feet net per chamber the RS-W10D2 lands at Qtc 1.485 with Fc at 46.9 Hz and F3 at 32.9 Hz, and the RS-W10D4 at Qtc 1.931 with Fc at 50.3 Hz and F3 at 34.0 Hz. The D2 is the better damped of the two; the D4 carries more lift near the corner.

Pick the coil that suits your amplifier's stable load, and use the same one in both chambers.

One side-mounted Proline X terminal cup is pre-wired in 12 gauge OFC to both driver positions in parallel, so you do not wire the two chambers separately at the amplifier. Both RS-W10 versions are dual voice coil, so you set the final impedance at the drivers by how you wire each one's coils, and Alpine's application guide covers every option. Wire both identically and confirm the load against your amplifier's minimum stable impedance. Target 500 to 600 watts RMS per driver.

Side mounted, and there is one cup serving both chambers. 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 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 pre-wired 12 gauge OFC to both driver positions in parallel.

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 each driver lands on 8/32 threaded inserts with stainless machine screws. A full-height bonded 3/4 inch divider separates the two chambers and ties the walls together across the 41 inch span. 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 in each chamber, 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 0.505 cubic feet per chamber this cabinet was built to.

No. This listing is for the enclosure only. Bring your own pair of RS-W10D2 or RS-W10D4; the drivers are purchased separately. The cutout and mounting depth are direct fit at both positions, and the 1.75 inch feet ship uninstalled for an installed height of 8.75 inches.