


American Bass HD 8" Car Subwoofer 400 Watts RMS Dual Voice Coil 2 Ohm or 4 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.
- 400W RMS / 800W Max — big output from a compact 8-inch frame
- Dual 2Ω or dual 4Ω — pick the model that matches your amp
- 2.5" high-temp copper voice coil — serious power handling for its size
- 135 oz ferrite magnet — heavy motor for an 8 that hits hard
- Models HD-822 / HD-844 — the answer for tight, hard-hitting bass in small spaces
American Bass HD 8" Car Subwoofer — 400W RMS Dual Voice Coil (HD-822 / HD-844)
This Listing Includes:
- (1) American Bass HD 8" Subwoofer
When space is tight but you still want to feel it, the American Bass HD 8" delivers. This little HD sub stuffs a 2.5-inch coil and a 135 oz magnet behind a heavy-duty basket, so the HD-822 and HD-844 hit far harder than an 8 has any right to. Build it into a small ported or sealed box and surprise everyone who hears it. Authorized American Bass dealer at JS Ultimate Sounds. Free shipping on orders $99+.
Features
- Heavy-duty blue powder-finish stamped basket
- Paper cone with high-roll foam surround for clean excursion
- 2.5" high-temperature copper voice coil
- 135 oz high-grade ferrite (ceramic) magnet
- Available in dual 2Ω (HD-822) or dual 4Ω (HD-844)
Specifications
| RMS Power | 400W |
| Max Power | 800W |
| Impedance | Dual 2Ω (HD-822) or Dual 4Ω (HD-844) |
| Sensitivity | 82.2 dB (HD-822) / 81.3 dB (HD-844) |
| Voice Coil Diameter | 2.5" |
| Magnet Weight | 135 oz |
| Basket / Frame | Heavy-duty stamped, blue powder finish |
| Cone Material | Paper |
| Surround | High-roll foam |
| Mounting Depth | 6.3" |
| Cutout Diameter | 7.2" |
| Fs | 49.84 Hz (HD-822) |
| Qts | 0.377 (HD-822) / 0.472 (HD-844) |
| Qes | 0.419 (HD-822) / 0.532 (HD-844) |
| Qms | 3.68 (HD-822) / 4.2 (HD-844) |
| Vas | 3.68 L (HD-822) / 3.41 L (HD-844) |
| Xmax | 0.6 mm |
| BL | 9.1 (HD-822) |
| Mms | 110.2 g (HD-822) / 111.2 g (HD-844) |

