Performance Optimized Down Fire Wide Sealed Dual 12" Enclosure Skar Audio EVL-12 · Dual 12" Sealed enclosure

Because some installs run out of height or depth before they run out of length. The standard Skar EVL-12 Down Fire cabinet is 30 by 15 by 9.11 inches; this one is 41 by 14 by 9.125. Here the motor sets the height, so the wide box stands about the same, but it is 1 inch shallower front to back, about the minimum a 12 inch frame needs, and the extra length holds more air.

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 9.11 inches and holds 0.59 cubic feet net per chamber; this one is 41 by 14 by 9.125 inches and holds 0.799 cubic feet net per chamber.

The wide box holds more because the 7.61 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 depth is the limit.

Skar rates the EVL-12 at 1250 watts RMS per driver, so target 875 to 1250 watts RMS per driver at the final load.

A pair of EVL-12 D4 drivers can land on 1 ohm with all four coils in parallel, 4 ohms as series pairs in parallel, or 16 ohms all in series. A pair of EVL-12 D2 drivers can land on 0.5 ohm with all four coils in parallel, 2 ohms as series pairs in parallel, or 8 ohms all in series. Anything under 1 ohm, and many amplifiers at 1 ohm, is outside what the amplifier is built for; series wiring is the safe default. Confirm your amplifier's minimum stable impedance first.

The cabinet is 9.125 inches tall measured in the down fire position, and that figure excludes the standoffs. The standoffs hold 1.75 inches under the baffle, so plan your space around a finished stack of roughly 10.875 inches.

The footprint is 41 inches wide by 14 deep, the Down Fire Wide platform. Height is the only dimension solved to the driver.

Two drivers sharing one sealed volume load each other: each driver's compression stroke becomes the pressure the other works against, which blurs the alignment either would have alone. A bonded full-height 3/4 inch divider gives each EVL-12 its own 0.799 cubic feet and its own polyfill.

It also means the alignment on this page is the alignment in each chamber, not an average across a shared box, and the divider ties the walls together across the 41 inch span.

Anechoic per chamber, EVL-12 D4: F3 51.0 Hz with system resonance at 43.8 Hz (Qtc 0.618); EVL-12 D2: F3 56.5 Hz with system resonance at 43.7 Hz (Qtc 0.570). Below Qtc 0.707 the rolloff is gentle and F3 sits above fc, which is what a well-damped sealed box does.

Those figures exclude cabin gain. In a car the cabin's transfer function adds real output below 50 Hz, so in-vehicle response runs deeper than the numbers above.

No. Polyfill is already installed in both chambers as a light wall lining to control internal reflections, and the quantity is chosen so it does not change the acoustic volume.

Do not add more. Packing a sealed box with fill makes it behave as though it were larger, which walks the alignment away from the 0.799 cubic feet per chamber this cabinet was built to.

No driver. This is an enclosure only. You receive the cabinet finished in plush black carpet, one side-mounted terminal cup pre-wired to both positions, the polyfill lining already in place, the standoffs, and a threaded insert kit with stainless machine screws.

The inserts ship loose on purpose: Skar prints no bolt circle for the EVL-12, so you set each driver in its recess, mark its holes, drill and press the inserts. The pair of Skar EVL-12 is purchased separately.