Audiobahn AW1805X
18″ subwoofer · 1,200 W RMS
| Source | web.archive.org · manufacturer data |
|---|---|
| Checked against source | October 2026 |
| Thiele/Small parameters | not in the spec sheet: Sd — typical value for the size used |
| Mounting dimensions | 3 of 4 — missing: magnet diameter; the designer will use an estimate |
Recommended box
For a sedan, one sub, 1,200 W. It’s the same math as the designer’s step-by-step mode, where you can fit the box to your space, vehicle and amp and get plans, a cut sheet and DXF.
Sealed
smaller, tighter| Bass character (Qtc) | Tight and punchy · 0.80 |
|---|---|
| Fc | 43 Hz |
| F3 (−3 dB, no cabin gain) | 41 Hz |
| Example box (outside) | 20 1/16″ × 20 1/16″ × 11 9/16″ |
Ported
deeper, louder| Tuning (Fb) | 30 Hz |
|---|---|
| Port | slot 2 3/4 × 19 7/16″, 33 1/2″ long |
| Port velocity at 1,200 W | 63 ft/s |
| F3 (−3 dB, no cabin gain) | 27 Hz |
| Example box (outside) | 31 1/2″ × 20 7/8″ × 17 13/16″ |
Deeper: 5.69 ft³ (161 L) tuned to 25 Hz, 31 1/2″ × 20 7/8″ × 23 15/16″ outside — a bigger box with flatter deep bass. Open in the calculator
Projects with this subwoofer
Boxes that users designed and published: plans, cut sheet and response graph.
Thiele/Small parameters
| Size | 18″ |
|---|---|
| Voice coils | — |
| RMS power | 1,200 W |
| Fs | 21.9 Hz |
| Qts | 0.41 |
| Qes | 0.44 |
| Qms | 5.4 |
| Vas | 5.01 ft³ |
|---|---|
| Re | 3.15 Ω |
| Sd | ≈ 180.6 in² |
| Xmax | 0.98″ |
| EBP | 50 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 87.3 dB calc. |
Mounting dimensions
| Cutout diameter | 16 3/4″ |
|---|---|
| Mounting depth | 7 3/4″ |
| Overall diameter | 18 1/2″ |
“≈” means the value isn’t in the spec sheet and a typical value for the size is used; “calc.” means it’s calculated from the published parameters. Check the manufacturer’s spec sheet before you build.
Data sources
Other Audiobahn 18″ models
- Audiobahn AW1805Q 18″ · dual 2 Ω
- Audiobahn AWT18X 18″
Similar 18″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- SoundQubed HDX418 D1 2.47 ft³ sealed · 4.63 ft³ ported
- Fi Audio SP4 18v2+ D1 2.38 ft³ sealed · 5.54 ft³ ported
- Kicker SoloX 18" 4-Ohm DVC (S18X D4) 2.12 ft³ sealed · 4.48 ft³ ported
- Fi Audio SP4 18v2+ D2 2.38 ft³ sealed · 5.54 ft³ ported
- Sundown Audio Zv6-18 D2 2.79 ft³ sealed · 6.99 ft³ ported
- Treo SSX18.22 2.93 ft³ sealed · 4.73 ft³ ported
FAQ
What box does the Audiobahn AW1805X need?
Recommended net volume: 1.77 ft³ sealed, 4.03 ft³ ported tuned to 30 Hz — for one sub in a sedan at 1,200 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Audiobahn AW1805X Thiele/Small specs?
Fs 21.9 Hz, Qts 0.41, Vas 5.01 ft³, Xmax 0.98″.
What is the Audiobahn AW1805X mounting depth?
Mounting depth is 7 3/4″, cutout diameter 16 3/4″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Audiobahn AW1805X handle and how do I wire it?
RMS power rating: 1,200 W. Wiring for several subs and amp power — in the wiring calculator.