Audiobahn AW1251SE
12″ subwoofer · 500 W RMS
| Source | web.archive.org · manufacturer data |
|---|---|
| Checked against source | October 2026 |
| Thiele/Small parameters | complete |
| Mounting dimensions | 3 of 4 — missing: magnet diameter; the designer will use an estimate |
Recommended box
For a sedan, one sub, 500 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) | Boomy, with a bump · 1.15 |
|---|---|
| Fc | 57 Hz |
| F3 (−3 dB, no cabin gain) | 44 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 9 3/16″ |
Ported
deeper, louder| Tuning (Fb) | 34 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 22 15/16″ long |
| Port velocity at 500 W | 52 ft/s |
| F3 (−3 dB, no cabin gain) | 38 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 11 1/4″ |
Deeper: 3.11 ft³ (88 L) tuned to 41 Hz, 31 1/2″ × 15 3/4″ × 15 5/16″ 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 | 12″ |
|---|---|
| Voice coils | — |
| RMS power | 500 W |
| Fs | 37.4 Hz |
| Qts | 0.75 |
| Qes | 0.88 |
| Qms | 5.28 |
| Vas | 2.44 ft³ |
| Re | 3.5 Ω |
|---|---|
| Sd | 80.6 in² |
| Xmax | 0.28″ |
| Vd | 22.2 in³ calc. |
| Mms | 101 g calc. |
| BL | 9.7 T·m calc. |
| EBP | 43 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 88.1 dB calc. |
Mounting dimensions
| Cutout diameter | 10 7/8″ |
|---|---|
| Mounting depth | 5 1/4″ |
| Overall diameter | 12 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 12″ models
- Audiobahn ALUM12 12″
- Audiobahn ALUM12N 12″ · dual 6 Ω
- Audiobahn ALUM12Q 12″ · dual 6 Ω
- Audiobahn ALUM12X 12″
- Audiobahn AW120Q 12″
- Audiobahn AW120SVC 12″
- Audiobahn AW120T 12″ · 4 Ω
- Audiobahn AW120XS 12″
- Audiobahn AW121T 12″ · 4 Ω
- Audiobahn AW122N 12″ · 4 Ω
- Audiobahn AW122T 12″
- Audiobahn AW1200 12″
Similar 12″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- JBL Selenium 12SW26A 4+4 1.80 ft³ sealed · 2.05 ft³ ported
- Rockville W12T4S2 1.94 ft³ sealed · 1.73 ft³ ported
- MTX Audio TN12-02 1.91 ft³ sealed · 2.01 ft³ ported
- Massive Audio ECO12S4 1.80 ft³ sealed · 1.91 ft³ ported
- Planet Audio AC12D 1.73 ft³ sealed · 1.70 ft³ ported
- Kicx STC-300 1.73 ft³ sealed · 2.19 ft³ ported
FAQ
What box does the Audiobahn AW1251SE need?
Recommended net volume: 1.84 ft³ sealed, 1.94 ft³ ported tuned to 34 Hz — for one sub in a sedan at 500 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Audiobahn AW1251SE Thiele/Small specs?
Fs 37.4 Hz, Qts 0.75, Vas 2.44 ft³, Xmax 0.28″, Sd 80.6 in².
What is the Audiobahn AW1251SE mounting depth?
Mounting depth is 5 1/4″, cutout diameter 10 7/8″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Audiobahn AW1251SE handle and how do I wire it?
RMS power rating: 500 W. Wiring for several subs and amp power — in the wiring calculator.