Proline X Micro Series 12" Sealed Enclosure - Fits Arc Audio SW12

Proline X Micro Series 12" Sealed Enclosure Cut, layered, and tuned for the Arc Audio SW12 shallow-mount subwoofer CNC Stack-Fab Down-Fire Primary Three Net Volumes Fits Arc Audio SW12 Bare or Loaded 0.65 to 1.0cu ft net range 0.8cu ft optimum 26 x 14.75in shared footprint 2.4"SW12 mounting depth Built Around the Arc Audio SW12 This is not a generic 12-inch box with a label on it. Every layer is cut to the Arc Audio SW12's published sealed targets, with the baffle bored to the SW12's 11-inch cutout and 8/32 threaded inserts set on the back face for tool-clean machine-screw mounting. The SW12 is a 2.4-inch shallow-mount driver built for deep, controlled bass in tight spaces, and this enclosure is the matched airspace it was designed to live in. The SW12 carries Arc Audio's published Thiele-Small data: Fs of 33 Hz, Qts of 0.616, Vas of 33.73 liters, and an EBP of 45.9, which places it firmly in sealed-enclosure territory. We ran the alignment math on that data and built the box to land it where it belongs. The larger Vas means the SW12 wants more airspace than the SW10 to reach the same Qtc, which is why these boxes run deeper. One Footprint, Three Net Volumes All three sizes share the same 26 by 14.75 inch face. Only the depth changes, so the box keeps the same mounting footprint whether you want the tightest response or the most extension. The volume you select is true net internal airspace, measured after the layered walls, bracing, and driver are accounted for. It is not a gross number with the losses hidden. Minimum | 0.65 cu ft net 26 x 14.75 x 5.25 in. The lowest-profile build with a warm, slightly boosted character. The right call when depth clearance is the hard limit. Optimum | 0.8 cu ft net 26 x 14.75 x 6.75 in. Arc Audio's recommended sealed volume. The balanced alignment, with controlled low end and clean transient response. Maximum | 1.0 cu ft net 26 x 14.75 x 8.25 in. The lowest Qtc of the three for the flattest response and deepest extension, when you have the room to give it. Down-Fire First, Front-Fire When You Need It This box is designed primarily to fire down. A separate 4-foot kit is included so you can lift the enclosure off the floor when you mount it down-fire, which sets the gap the cone loads against, couples the bass into the chassis, and protects the driver face. Install the feet when you run it down-fire, leave them off when you do not. It also works front-fire as a secondary orientation if your space calls for it, so the same box covers both installs. The SW12 helps here because its N42UH neodymium motor sits outside the sealed air volume. In a down-fire box that motor lives in the open cavity between the baffle and the floor rather than crammed inside a hot, sealed pocket, so it gets free airflow on every excursion. It also means the net airspace stays true, since the motor is not stealing volume from inside the chamber. We do not mill a magnet-relief pocket the way we do on rear-motor drivers, because there is no rear motor to relieve. The chamber is clean, sealed, and built only for the cone. True net, not marketing net. Internal volume is calculated by summing each CNC-cut layer's opening. Dowel reinforcement runs between layers purely as tension hardware and does not reduce the airspace you paid for. Proline X Stack-Fab Construction Every Micro Series enclosure is cut on our ShopSabre routers from Langboard Elite 3/4-inch MDF, a dense 48.5 lb/ft³ board with a 200 psi internal bond and 410,000 psi MOE. Instead of butt joints or dado cuts, the box is stack-fabricated: each layer is a precision-cut ring, and the stacked layers do the joining themselves. The result is a continuous, void-free wall with no seam to flex or leak. Radiused, Not Boxy All four corners are radiused 3 inches viewed top-down. Cleaner airflow inside, and a finished look that does not telegraph a slab-sided box under the carpet. Pre-Wired Terminal Cup Proline X ABS and carbon-fiber composite cup with stainless hardware and copper ring terminals, pre-wired internally with 12-gauge OFC. No CCA anywhere in the build. Damped and Finished Polyfill is pre-installed in every sealed build to smooth the in-box response, and the shell is wrapped in plush black carpet. Built in Tullahoma, Tennessee. Enclosure Only or Loaded Order the enclosure bare and drop in your own Arc Audio SW12, or order it loaded and we mount the driver, dress the wiring, and ship it ready to bolt in. Loaded builds are available in both the SW12 D2 and SW12 D4 coil configurations, selectable by variant. Either way the box is the same precision-cut shell, cut to the size you select, and the 4-foot down-fire kit is included so you are ready to run it either orientation out of the box. Sealed Enclosure Performance: Pre-Calculated Using Arc Audio's published Thiele-Small parameters for the SW12 in the D4 parallel configuration, here are the predicted Qtc, system resonance (Fc), and F3 rolloff across the three sizes this enclosure is offered in. Arc Audio recommends 0.8 cubic feet as the optimum sealed volume. These are calculated with the same formulas as the Audio Intensity Sealed Box Calculator. Arc Audio SW12 D4 (Parallel) | Qts 0.616 | Fs 33 Hz | Vas 33.73 L Enclosure Size Qtc Fc F3 Minimum | 0.65 cu ftTightest profile, warm and slightly boosted 1.037 55.5 Hz 43.0 Hz Optimum | 0.80 cu ft ★Arc Audio recommended sealed volume 0.972 52.1 Hz 41.5 Hz Maximum | 1.00 cu ftFlattest response, deepest extension 0.912 48.8 Hz 40.2 Hz Arc Audio SW12 Frequency Response | Sealed -12dB -9dB -6dB -3dB 0dB 3dB -3dB 20Hz 30Hz 50Hz 100Hz 200Hz 300Hz 0.65 cu ft (Qtc 1.037) 0.80 cu ft (Qtc 0.972) ★ Recommended 1.00 cu ft (Qtc 0.912) -3dB reference Note on impedance: These alignments are calculated from Arc Audio's published T/S for the SW12 in the D4 parallel set. The D2 variant carries slightly different Qts and Vas figures and will land marginally different sealed alignments, though all three sizes stay in the same character range. Run your own numbers in the Sealed Box Calculator. Cut for the Driver, Not the Catalog Select your size and configuration above. Every Proline X Micro Series enclosure ships with free shipping to the lower 48 and a 2-year warranty, built one at a time in Tullahoma, Tennessee.