Professional Series Ported 15" Enclosure Ampere Audio AA-2.75 15 · Single 15" Ported enclosure

Sealed, the AA-2.75 15 builds well: our wedge holds 3.27 cubic feet at Qtc 0.66 to 0.76 with half power at 43 to 50 Hz. Vented, the same driver reaches 31.8 Hz. The port runs 18.1 m/s in the channel and 12.5 at the mouth at 1200 W, 1.2 times Ampere's rating, and the cone peaks at 8.2 of its 19 mm. Passband ripple is 0.9 dB and the in-car spread from 25 to 60 Hz 2.5 dB. 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.

The AA-2.75 15 also builds in the Performance Optimized ported wedge, the smaller and cheaper box. The Professional cabinet is the step up for it: a 2.25 inch three-layer baffle with the woofer flush in the outer layer, and a slot port gated at 1200 W. It carries a 2 year warranty, against 1 year on the Performance Optimized lines.

Ampere Audio does not publish the mounting hole locations for the AA-2.75 15, so we cannot install the threaded inserts before it ships. The threaded insert kit comes in the box instead: inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, an allen key and woofer gasket tape. You set the inserts when you mount the woofer, and this box ships with one kit.

Yes, at 27 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 Ampere Audio AA-2.75 15 at 43 percent of its usable travel at 1200 W.

Not one we can show you. We do not build a sealed enclosure for the Ampere Audio AA-2.75 15 and Ampere 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 27 Hz subsonic filter takes over; around 34.0 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, 2.75 inches wide and 45.4 square inches. It runs 8.00 inches to the back wall and turns once along it for 17.49 inches; the fold costs about 1.5 Hz and the port is cut for it. The channel runs at 18.1 metres per second at 1200 W, 36 percent of its turbulence limit, and the mouth edges carry a 1/2 inch roundover so the air leaves the face at 12.5 metres per second against the 17 metres per second threshold where a slot starts to chuff.

67 lb, 36.00" W x 18.00" H x 14.50" D external. Every Professional cabinet is priced the same way, by its size: this one is 5.44 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 Ampere Audio AA-2.75 15 specifically: the 14.010 inch cutout, the 9.000 inch mounting depth allowance and the 2.50 cubic foot alignment all come from Ampere Audio's published parameters. It fits both coil versions (D2 and D4), and the cabinet was checked against both. Bring your own driver.