Performance Optimized Down Fire Wide Sealed Dual 10" Shallow Sub Enclosure Arc Audio SW10 · 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 7.375 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 8 inches and gives each driver 0.55 cubic feet net. This one is 41 by 12 by 7.375 inches and gives each driver 0.551 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 0.551 cubic feet net per chamber the SW10 lands at Qtc 0.844 with Fc at 53.2 Hz and F3 at 45.9 Hz on Arc's series wiring parameters, and Qtc 0.863 with Fc at 53.1 Hz and F3 at 45.2 Hz on the parallel set.

The two are nearly identical, so the cabinet is correct whichever way you wire the coils. F3 in the mid 40s is the cost of a 2.4 inch motor, and cabin gain below 60 Hz does the rest in a vehicle.

One side-mounted terminal cup with a single pair of posts is pre-wired in 12 gauge OFC to both driver positions in parallel. Each SW10 is dual voice coil, in dual 2 ohm or dual 4 ohm, so the way you wire each driver's coils sets the load the amplifier sees. Wire both identically, since mismatched wiring between chambers splits power unevenly, and confirm the load against your amplifier's minimum stable impedance.

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 0.551 cubic feet per chamber this cabinet was built to.

No. This listing is for the enclosure only. Bring your own pair of Arc Audio SW10 subwoofers; 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 9.125 inches.