Performance Optimized Down Fire Wide Sealed 10" Shallow Sub Enclosure Arc Audio A10 · Single 10" Sealed enclosure

Because it is only 12 inches deep. The standard Performance Optimized Down Fire cabinet for the Arc Audio A10 is 30 wide by 15 deep, and this version is for spaces 3 inches shallower than that, under a rear bench or on a narrow cargo floor.

Airspace has to come from somewhere. Losing depth means recovering it along the length, so the cabinet runs 41 inches long and stands 5.875 inches tall. If you have 15 inches of depth, the standard cabinet is shorter in length and is the better pick; if you have 12 inches of depth and 41 inches of run, this is the shape that works.

Same driver, different shape. The standard cabinet is 30 by 15 by 6.25 inches and was built to 0.80 cubic feet net. This cabinet is 41 by 12 by 5.875 inches and holds 0.801 cubic feet net.

The airspace is essentially the same, within about a hundredth of a cubic foot, so the two behave the same way. The choice is about the space you have: the standard box is deeper and shorter in length, this one is long and shallow.

Because Arc Audio publishes their sealed enclosure recommendations as gross volume rather than net, which is unusual. Most manufacturers state net volume, the airspace remaining after the driver's own displacement is subtracted.

We built this cabinet to 0.848 cubic feet gross to land on Arc's published gross optimum, which works out to 0.801 cubic feet net after the A10's estimated 0.04 cubic feet of displacement (Arc publishes none). Both figures appear in the specifications so you can compare against either convention.

They are close in this cabinet. The A10D2 has a Qts of 0.477 and lands at Qtc 0.796 with F3 at 40.6 Hz. The A10D4 has a Qts of 0.506 and lands at Qtc 0.853 with F3 at 39.0 Hz, slightly less damped but reaching a little lower.

The D4 also has more motor force, 18.090 T against the D2's 13.766. Both are 250 watts RMS with the same 8mm Xmax and identical fitment. Choose based on what load your amplifier is stable and efficient into.

Arc rates the A10 at 250 watts RMS continuous with 500 watts musical. Their documentation is direct about what happens above that: sustained operation beyond the RMS rating will burn the voice coil, and that damage is considered abuse rather than a warranty claim.

Arc also notes that underpowering is not a risk, but a small amplifier driven into clipping is. Feed it clean, unclipped power in the 200 to 250 watt range. Both variants are dual voice coil, so set the final load at the driver and confirm it against your amplifier's minimum stable impedance.

Side mounted. Every Proline X Performance Optimized enclosure uses a side mounted terminal cup regardless of alignment, whether standard, wedge, or down fire. On this cabinet that keeps the connection fully 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. Every panel joint is a machined interlocking groove that mechanically locks the panels before adhesive is applied, which keeps the cabinet airtight under sustained pressure cycling. A windowed U-brace, dadoed to the shell, ties the long walls together across the 41 inch span. The front baffle is a double layer at 1.5 inches, two bonded 3/4 inch sheets with the outer layer machined as a flush recess. 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 Arc Audio A10D2 or A10D4. The cutout and mounting depth are direct fit for either version, and the feet ship uninstalled in the box.