Worst Subwoofer Brands to Avoid in 2026: Expert Guide
The worst subwoofer brands to avoid in 2026, why they fail (peak-watt inflation, weak voice coil...
Read Article →
Proline X
Arc Audio X2 12" Subwoofer + Matching Proline X Enclosure | Bundle, Box 50% Off
SKU: BNDL-X2-12-D4-Grey
$ 308.99
$ 388.99
Save
$ 80.00
🚚
Free shipping, anywhere in the lower 48
A subwoofer plus a wood enclosure is real freight, and it adds up fast, especially coast to coast. We cover all of it, every bundle, every state. The price you see is the price at your door, with nothing added at checkout.
Arc Audio X2 12" Subwoofer + Matching Proline X Enclosure | Bundle, Box 50% Off
Free Insured Shipping
On orders over $99
Full Warranty
Authorized Dealer
Lifetime Support
Real Installers
The Bundle
The Arc Audio X2 12 subwoofer and its matching Proline X enclosure, sold as one unit. Through the July event the enclosure is 50 percent off, so you get the box at half price and the whole system ships as a single part number. One add to cart, one delivery, one box to unpack.
Pick your voice coil above, D2 or D4. The enclosure is the Proline X Performance Wedge P12-WS III, a single 12 inch sealed wedge cut and built in house in Tullahoma, Tennessee, pre-wired with 12 gauge OFC and polyfilled, ready to drop in and wire up.
In The Box
▸One Arc Audio X2 12 subwoofer (D2 or D4)
▸One Proline X P12-WS III sealed enclosure, pre-wired and polyfilled
▸2 year enclosure warranty
Arc Audio X2V2 12 Subwoofer
The X2V2 12 is where the X2V2 platform starts to fill a cabin without asking much from the amplifier. 250 watts RMS, 15mm of one-way Xmax, and sensitivity reaching 85.95 dB mean a mid-range mono amp delivers real output. A 514 square centimeter cone moves serious air, and the full thermal system, copper-coated aluminum coil on a Kapton former, eight-vent stamped basket, T-Yoke vent, and double-stacked magnets, lets it take its rated power continuously, not just on a bench.
Pick your coil by your amplifier. D2 wires to 1 or 4 ohms for 1-ohm monoblocks, D4 wires to 2 or 8 ohms. The large-diameter rubber surround and woven tinsel leads are built to keep this driver working for years.
Key Specs
RMS power250 W
Peak power500 W
Voice coilDual 2 or Dual 4 ohm, 2 in
Xmax15 mm one-way
Sensitivity85.95 dB (D2)
Mounting depth6.75 in
Cutout11.11 in
Recommended sealed volume0.9 to 1.55 cu ft (optimal 1.15)
Proline X Performance Wedge P12-WS III
A single 12 inch sealed wedge at 1.25 cubic feet net. The angled back tapers to match the recline of a rear seat, reclaiming 3 to 5 inches of upper trunk space versus a rectangular box of the same volume. CNC cut and hand-assembled in Tullahoma.
Dimensions & Fitment
Net internal volume1.25 cu ft, sealed
External W x H x D16 x 14.5 x 14.5 in (tapers to 9.25 in deep at top)
Subwoofer cutoutUp to 11.13 in
Max mounting depth8.5 in
Panel stock3/4 in Langboard Elite MDF
The X2V2 12 fits with room to spare: its 11.11 in cutout and 6.75 in depth both sit inside the box's limits, and after the driver's 0.07 cu ft displacement the net lands near 1.18 cu ft, right in Arc's 0.9 to 1.55 range by the 1.15 optimal.
How It Is Built
▸Langboard Elite MDF, 3/4 inch panels, 48.5 lb/ft³ density and 200 psi internal bond
▸CNC cut on our ShopSabre industrial routers in Tullahoma
▸V-groove and dado joinery. The angled panels mechanically interlock before glue, so the wedge's angled joints stay airtight under bass pressure cycling
▸Single baffle with a recessed terminal cup, protected from cargo contact
▸Hand-assembled and inspected in Tennessee, no overseas manufacturing
Ready To Install
WiringPre-wired, 12 gauge OFC
Terminal cupABS / carbon fiber, copper ring terminals
FinishDark Gray Trunkliner (Plush Black available)
Warranty2 year
Why This Works
Sealed is the right call for the X2 12. A sealed box trades maximum output for control, so transients stay tight and the low end reads accurate instead of boomy. That fits the X2's character and the kind of build it goes into.
The P12-WS III gives you that sealed volume without guesswork. Instead of estimating box size or cutting your own, you get a Proline X enclosure built to the sealed target for a 12 inch driver, in a wedge that actually fits a trunk wall or behind a seat.
Because it ships pre-wired and polyfilled from our shop, it is a drop-in. Mount the sub, land your leads, done.
The Bottom Line
This is a fixed bundle, so the box is locked to the sub. There is no wrong enclosure to order by mistake. The correct sealed box for the driver, built in house, at half price.
Bundle FAQs
How does the bundle discount work?
The Proline X P12-WS III enclosure is 50 percent off when you buy it with the X2V2 12 in this bundle. The sub stays at its regular 229 dollars, the enclosure drops from 159.99 to 79.99, so the bundle is 308.99 instead of the 388.99 combo retail. You save 80 dollars, in one add to cart.
Can I buy the enclosure separately at the bundle price?
No. The 50 percent enclosure price only exists inside this bundle. On its own the P12-WS III is 159.99. Buying the sub and box together as the bundle is the only way to get the box at half price.
What ships with the bundle?
One Arc Audio X2V2 12 subwoofer in the voice coil you select, and one Proline X P12-WS III sealed wedge enclosure, pre-wired with 12 gauge OFC and polyfilled. Both ship together as a single unit from Tullahoma, Tennessee.
Should I choose the D2 or D4 voice coil?
Choose by your amplifier. The dual 2 ohm (D2) wires to 1 ohm or 4 ohms, which suits 1-ohm monoblocks. The dual 4 ohm (D4) wires to 2 ohms or 8 ohms. Both cost the same in the bundle. If you are unsure, tell us your amp and we will point you to the right one.
Is the enclosure the right size for the X2V2 12?
Arc Audio recommends a sealed enclosure of 0.9 to 1.55 cubic feet for the X2V2 12, with 1.15 cubic feet as optimal. The P12-WS III is the Proline X sealed wedge we pair with this driver, cut and built in house in Tullahoma.
What warranty comes with the bundle?
The Arc Audio X2V2 12 carries Arc Audio's 1-year warranty through authorized dealers, and Audio Intensity is one. The Proline X enclosure carries a 2-year warranty. You also get lifetime install support from real installers.
