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October 27 to November 2, 2026
American Bass XMAXXX Monster 12" Single Bundle (Baltic Birch)
Many in-stock orders ship within 1-2 business days, but timing varies by item. Custom, built-to-order, oversized, special-order, and supplier-direct products may need extra processing time. Free shipping applies to qualifying orders over $99 within the contiguous US. Freight items may require delivery coordination; any shipping exceptions are shown before checkout. Approved returns may be subject to a restocking fee.
Most products are covered by the manufacturer's warranty against defects. Damage from over-powering or improper installation isn't covered — we'll help coordinate any valid claim.
Tell us your vehicle, subwoofers and electrical setup and our team will help you match the right gear. Reach out before you buy.
How this package ships
- Two separate deliveries. Your subwoofer ships from JS Ultimate Sounds and usually arrives first.
- Separate tracking numbers. You will get one for each delivery, so a tracking link showing only part of your order is normal.
- The enclosure is built to order by Basshead Supply and ships direct from them in about 2 to 3 weeks.
- The subwoofer is not pre-installed. You mount it in the enclosure once both have arrived.
- The enclosure arrives finished in a gray stain, ready to install.
What is included
- (1) American Bass Xmaxxx Monster 12" Car Subwoofer 3000 Watts RMS Dual Voice Coil 1 Ohm or 2 Ohm
- (1) American Bass XMAXXX Monster 12" Single Ported Subwoofer Enclosure, Baltic Birch
Priced 10% below buying the subwoofer and enclosure separately.
Choose your impedance below.
American Bass Xmaxxx Monster 12" Car Subwoofer 3000 Watts RMS Dual Voice Coil 1 Ohm or 2 Ohm
- 3000W RMS / 6000W Max — competition-grade output from a 12
- Dual 1Ω or dual 2Ω — XMAXXX-1211 and XMAXXX-1222 for your amp
- 3.5" hi-temp 4-layer voice coil — built to swallow serious power
- 20mm Xmax + 321 oz magnet — monster excursion and motor force
- Models XMAXXX-1211 / XMAXXX-1222 — a true SPL-ready 12
American Bass Xmaxxx Monster 12" Car Subwoofer — 3000W RMS Dual Voice Coil (XMAXXX-1211 / XMAXXX-1222)
This Listing Includes:
- (1) American Bass Xmaxxx Monster 12" Subwoofer
The American Bass Xmaxxx Monster 12" is built for people who chase numbers on the mic. With 3000 watts RMS, a 3.5-inch coil, and a full 20mm of Xmax, the XMAXXX-1211 and XMAXXX-1222 throw air like a much bigger sub. Build it into a tuned ported box and the Xmaxxx Monster earns its name.
Features
- Carbon-fiber reinforced non-pressed paper cone for extreme excursion
- Over-sized fat foam surround for long, controlled travel
- Hi-temp 4-layer voice coil wire for brutal power handling
- Blue powder-coated heavy-duty metal basket
- Matching blue surround stitching for a clean, aggressive look
Specifications
| RMS Power | 3000W |
| Max Power | 6000W |
| Impedance | Dual 1Ω (XMAXXX-1211) or Dual 2Ω (XMAXXX-1222) |
| Sensitivity | 84.7 dB (XMAXXX-1211) / 85.9 dB (XMAXXX-1222) |
| Voice Coil Diameter | 3.5" |
| Magnet Weight | 321 oz |
| Basket / Frame | Blue powder-coated heavy-duty metal |
| Cone Material | Carbon-fiber reinforced non-pressed paper |
| Surround | Over-sized fat foam |
| Mounting Depth | 9.17" |
| Cutout Diameter | 11.4" |
| Fs | 31.9 Hz (XMAXXX-1211) / 30.7 Hz (XMAXXX-1222) |
| Qts | 0.381 (XMAXXX-1211) / 0.364 (XMAXXX-1222) |
| Qes | 0.415 (XMAXXX-1211) / 0.39 (XMAXXX-1222) |
| Qms | 4.562 (XMAXXX-1211) / 5.344 (XMAXXX-1222) |
| Vas | 24.263 L (XMAXXX-1211) / 21.508 L (XMAXXX-1222) |
| Xmax | 20 mm |
| BL | 23.33 (XMAXXX-1211) / 26.05 (XMAXXX-1222) |
| Mms | 313.335 g (XMAXXX-1211) / 381.192 g (XMAXXX-1222) |
American Bass XMAXXX Monster 12" Single Ported Subwoofer Enclosure
- Net Volume - 2.5 cu ft
- Tuning - 32.0 Hz
- Port Area - 36.4 sq in
- Sub Cutout - 11.125"
- Construction - 1" (24mm) plywood construction
This Listing Includes: (1) Basshead Supply ported enclosure for the American Bass XMAXXX Monster 12" subwoofer
This enclosure is custom built specifically for the American Bass XMAXXX Monster 12" subwoofer. Basshead Supply's Performance Series enclosures are subwoofer-specific boxes engineered for strong, clean output, built with a refined assembly process that leaves no visible screw holes. Every box is glued with Titebond III and internally braced, then pre-wired with a recessed satin-nickel binding post and OFC 10-gauge wire - built by hand in the USA. Custom built to order by Basshead Supply and shipped directly from them, about 2 to 3 weeks.
Features
- 1" (24mm) plywood construction
- 17 ply birch veneer construction
- Gray stained finish
- Refined assembly - no visible screw holes
- Glued with Titebond III and internally braced
- Pre-wired recessed satin-nickel binding post with OFC 10-gauge wire
- Built by hand in the USA
Specifications
| Net Volume | 2.5 cu ft |
| Tuning | 32.0 Hz |
| Port Area | 36.4 sq in |
| Port Dimensions | 14.0" x 2.6" |
| Sub Cutout | 11.125" |
| Construction | 1" (24mm) plywood construction |
| Finish | Gray stained finish |
| Wiring | Pre-wired metal binding post with 10ga OFC wire |
| Dimensions (HxWxD) | 16.0" x 26.625" x 19.75" |
