AudioControl EPICX10 Dual Box: Sealed 10" Down Fire Enclosure Dual 10" Sealed enclosure

The EPICX10, yes, in both coil versions. The baffle is cut to 9.200 in for AudioControl's 10.500 in frame. The 5.30 inch motor clears the cabinet with 2.76 inch to spare. Run two of the same coil so the chambers match.

Any other 10, no. The airspace is engineered around the EPICX10's own Qts and Vas, and a different woofer that happened to drop into the hole would not see the alignment printed on this page.

0.62 cubic feet net per chamber on AudioControl's published figures: the EPICX10 D2 (dual 2 ohm) reads Qtc 0.760 with resonance at 57.0 Hz and half power at 53.3 Hz, and the EPICX10 D4 (dual 4 ohm) reads Qtc 0.842 with resonance at 57.2 Hz and half power at 49.5 Hz. One cabinet serves both coils. That is AudioControl's own recommended sealed size for this driver, 0.625 cubic feet, between their 0.5 minimum and 1 maximum. That is a touch above maximally flat: a small lift near resonance and firm midbass.

Cabinet gain in a vehicle lifts the bottom end further, so in the car this reads deeper than the anechoic figures.

AudioControl rates the EPICX10 at 500 watts RMS per driver, so target 350 to 500 watts RMS per driver at the final load.

AudioControl sells the EPICX10 as EPICX10 D2 (dual 2 ohm) and EPICX10 D4 (dual 4 ohm); a matched pair should share a coil. A pair of dual 2 ohm drivers lands on 2 ohms with each woofer's coils in series and the two woofers in parallel, or 8 ohms all in series. A pair of dual 4 ohm drivers lands on 4 ohms with each woofer's coils in series and the woofers in parallel, or 1 ohm with everything in parallel. Anything under 1 ohm, and many amplifiers at 1 ohm, is outside what the amplifier is built for, so series wiring is the safe default. Confirm your amplifier's minimum stable impedance first.

The cabinet is 8.81 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 10.56 inches.

The footprint is the standard Performance Optimized down fire platform, 30.00 inches wide by 15.00 deep. 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 driver its own 0.62 cubic feet and its own polyfill.

It also means a failure in one driver does not unload the other, and the alignment on this page is the alignment in each chamber, not an average across a shared box.

Anechoic F3 is 53.3 Hz on the EPICX10 D2 (dual 2 ohm) and 49.5 Hz on the EPICX10 D4 (dual 4 ohm) per chamber. Above Qtc 0.707 F3 sits below fc, so the response carries a small lift near resonance before it rolls off.

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 0.62 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 pre-wired terminal cup to both positions, the polyfill lining already in place, the standoffs, and a threaded insert kit with stainless machine screws.

The inserts are not pre-installed: AudioControl publishes no bolt circle for the EPICX10, so set the driver in its recess, mark its holes, drill and press the inserts. The pair of AudioControl EPICX10 is purchased separately, and the cabinet is cut direct fit to it, not a general purpose 10 inch box.