American Bass Xmaxxx Monster 18" Car Subwoofer 4000 Watts RMS Dual Voice Coil 1 Ohm or 2 Ohm
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 in the contiguous US. 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.
Subwoofer Wiring Diagram
Select your configuration to view possible wiring combinations.
Loading wiring diagrams…
Diagrams are on our wiring diagram page.
%0A%0A4.0%22%204-layer%20high-temp%20coil%20%E2%80%94%20handles%20sustained%20...
){kind=link}
- 4000W RMS / 8000W Max — monster output for high-powered 18" builds
- Dual 1Ω or Dual 2Ω — pick the coil for your setup (XMAXXX-1811 / XMAXXX-1822)
- 4.0" 4-layer high-temp coil — handles sustained power with ease
- Triple-stacked high-energy magnet — serious motor force behind every note
- Blue powder-coated basket — oversized fat foam surround and 22.5mm Xmax
American Bass Xmaxxx Monster 18" Car Subwoofer — 4000W RMS Dual Voice Coil (XMAXXX-1811 / XMAXXX-1822)
This Listing Includes:
- (1) American Bass Xmaxxx Monster 18" Subwoofer
The American Bass Xmaxxx Monster 18" is ready to dominate your car audio system. Its blue powder-coated basket and matching blue-stitched surround give the Monster an unmistakable look, while a 4.0" four-layer high-temp voice coil, triple-stacked high-energy magnets, and a carbon-fiber-reinforced cone deliver the true power this sub is famous for. Grab XMAXXX-1811 for dual 1-ohm or XMAXXX-1822 for dual 2-ohm and build the meanest system on the block. Authorized American Bass dealer at JS Ultimate Sounds. Free shipping on orders $99+.
Features
- 4.0" hi-temp 4-layer voice coil
- Triple-stacked high-energy magnet motor
- Blue powder-coated heavy-duty basket
- Carbon-fiber-reinforced non-pressed paper cone with oversized fat foam surround
- Dual voice coil design with 22.5mm Xmax
Specifications
| RMS Power | 4000W |
| Max Power | 8000W |
| Impedance | Dual 1Ω (1811) / Dual 2Ω (1822) |
| Sensitivity | 86.5 dB (1Ω) / 87.2 dB (2Ω) |
| Voice Coil | 4.0", 4-layer high-temp |
| Magnet | Triple-stacked high-energy |
| Basket | Powder-coated heavy-duty steel |
| Mounting Depth | 11.5" |
| Cutout Diameter | 16.8" |
| Xmax | 22.5mm |
| Fs | 31.76 Hz (1Ω) / 32.5 Hz (2Ω) |
| Qts | 0.53 (1Ω) / 0.43 (2Ω) |
| Qes | 0.59 (1Ω) / 0.47 (2Ω) |
| Qms | 5.55 (1Ω) / 6.17 (2Ω) |
| Vas | 53.57 L (1Ω) / 46.98 L (2Ω) |
| BL | 23.95 (1Ω) / 38.12 (2Ω) |
| Mms | 855 g (1Ω) / 929 g (2Ω) |
