Performance Optimized Down Fire Wide Sealed 12" Enclosure Arc Audio ARC 12 · Single 12" Sealed enclosure

Because some installs run out of height or depth before they run out of length. The standard ARC Audio ARC 12 Down Fire cabinet is 30 by 15 by 7.625 inches; this one is 41 by 14 by 7.5. Spreading the airspace along 11 more inches lets the cabinet stand 0.125 inches lower, and at 14 inches deep it is 1 inch shallower front to back, about the minimum a 12 inch frame needs.

If you have 41 inches of run and height or depth is the limit, this is the shape. If length is the limit, the standard 30 x 15 is the better fit.

Same driver, same construction, different shape. The standard box is 30 by 15 by 7.625 inches and holds 1.085 cubic feet net; this one is 41 by 14 by 7.5 inches and holds 1.383 cubic feet net.

The wide box holds more because the 6 inch motor sets its height, and on a longer footprint that height encloses more air. More air lowers Qtc, a softer, better damped corner. Choose the standard box when length is limited or you want the livelier alignment, this one when height or depth is the limit.

They behave differently in the same box. The Dual 2-Ohm has a Qts of 0.416 and lands at Qtc 0.708 with Fc and F3 both at 38.8 Hz, the flatter, better damped alignment. The Dual 4-Ohm has a Qts of 0.468 and lands at Qtc 0.803 with F3 at 35.6 Hz, about 3 Hz deeper with more lift near the corner.

If accuracy matters most, take the Dual 2-Ohm. If you want the fullest bottom end, take the Dual 4-Ohm. The cabinet is cut identically for both, so the other consideration is which final impedance suits your amplifier.

No, and we would rather say so. ARC publishes 0.9 minimum, 1.1 optimum and 1.25 maximum, all gross. This cabinet is 1.462 cubic feet gross and 1.383 net, above their maximum.

The 6 inch mounting depth needs 7.5 inches of cabinet height once we leave 0.75 inch above the motor, and that height on a 41 by 14 footprint encloses more air than ARC asks for. More air lowers Qtc, which is the safe direction. If you want ARC's window, the standard 30 x 15 box sits inside it.

ARC Audio rates the ARC 12 at 350 watts RMS continuous with 700 watts musical, and lists an amplifier range of 5 to 700 watts. Sustained operation above RMS burns the voice coil and is not covered under warranty.

At 89 dB sensitivity it does not need to be pushed. In a box this size run a subsonic filter, keep the amplifier clean, and treat 350 watts as the ceiling.

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 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. Corners are square, the Down Fire series standard.

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 so the driver bolts to the inner layer. A windowed U-brace ties the long 41 inch panels together and polyfill is installed as a light wall lining. The motor clears the top panel by 0.75 inch. Assembled and inspected in Tullahoma, Tennessee.

No. This listing is for the enclosure only. Bring your own ARC Audio ARC 12 in either coil configuration. The cutout and mounting depth are cut specifically for this driver.