Professional Series Ported Dual 12" Enclosure JL Audio 12W7AE-3 · Dual 12" Ported enclosure

Both drivers share one chamber and one port rather than sitting in separate boxes, so the pair works against the whole volume and the port is sized for the pair rather than doubled. The port carries 65.2 square inches of area at 36.7 Hz, and the design power for the velocity and excursion checks is 2400 W for the pair. Passband ripple holds at 3.00 dB across the tuning, with F3 at 33.5 Hz. Tuning is chosen for in-car response rather than an anechoic curve: a vehicle adds roughly 12 dB per octave below about 45 Hz, and this tuning is where that sum comes out flattest across 25 to 60 Hz.

Every driver is run through the Performance Optimized wedge and down-fire before this chassis; the Professional box is where a driver lands when that smaller envelope, 30 inches wide and 18 inches deep with a triangular side port, cannot give it what it needs at its rated power. The 12W7AE-3 did not clear the port gate there. The calmest wedge port that fits that envelope is 21.4 square inches at 27.0 by 12.25 by 17.89 inches, and its mouth runs 18.3 metres per second at 1000 W against the 17 metres per second line where a port starts to chuff. That port would stay clean to about 863 W. The slot on this box reaches 65.2 square inches and holds the mouth at 16.1 metres per second at 2400 W. An under-ported box does not fail quietly. Air speed at the mouth rises with power; past the chuff line the flow turns turbulent and the port is audible on every note. The turbulence also chokes the port, so the box behaves as if it were tuned higher than it is, loses output near tuning, and lets the cone travel further below tuning than the design allows. This chassis is a full-size front-firing box on a 2.25 inch baffle built from three 3/4 inch layers with the woofer flush-mounted in the outer layer, a JL Audio logo acrylic, and a port and excursion budget checked at 2400 W. It carries a 2 year warranty, against 1 year on the Performance Optimized lines.

Threaded inserts pressed into the baffle on the published 11.270 inch bolt circle, stainless machine screws included. The inserts are in the baffle when it arrives; the machine screws are in the terminal cup bag.

Yes, at 29 Hz, 24 dB per octave. Below tuning a vented box stops loading the cone and excursion runs away toward DC. With the filter in place this cabinet puts the JL Audio 12W7AE-3 at 36 percent of its usable travel at 2400 W.

Not one we can show you. We do not build a sealed enclosure for the JL Audio 12W7AE-3 and JL Audio publish no sealed volume for it, so the Performance Graphs tab carries no ported-versus-sealed chart: the only sealed box left to plot would be this cabinet stuffed and sealed, which nobody would build, and a comparison against it would tell you nothing you could buy. What a vented box gives up is the region below tuning, where the cone unloads and the 29 Hz subsonic filter takes over; around 36.7 Hz the vent carries the load and cone travel drops to its minimum, which no sealed alignment can do.

It is a vertical slot beside the woofer, the full height of the cavity, 4.50 inches wide and 65.2 square inches. It runs 10.25 inches to the back wall and turns once along it for 8.35 inches; the fold costs about 1.5 Hz and the port is cut for it. The channel runs at 21.1 metres per second at 2400 W, 31 percent of its turbulence limit, and the mouth edges carry a 1/2 inch roundover so the air leaves the face at 16.1 metres per second against the 17 metres per second threshold where a slot starts to chuff.

67 lb, 39.50" W x 16.00" H x 18.50" D external. Every Professional cabinet is priced the same way, by its size: this one is 6.77 cubic feet outside. Delivery to the 48 states is inside the price; it ships as a 67 lb parcel and checkout adds nothing. Do not add polyfill; it ships dry on purpose.

No. This is an enclosure only, cut for the JL Audio 12W7AE-3 specifically: the 10.512 inch cutout, the 9.488 inch mounting depth allowance and the 3.45 cubic foot alignment all come from JL Audio's published parameters. It fits both coil versions; the alignment published here is the Single 3 Ohm. Bring your own driver.