Audiopipe TXX-BDC4-12
12″ subwoofer · dual 4 Ω · 1,100 W RMS
Fs 33 HzQts 0.35Vas 1.34 ft³Xmax 0.33″
The published specs don’t add up:
- Fs, Vas and Sd don't match the moving mass of 346 g (they give 244 g) — one of the spec sheet values is probably wrong.
Recommended box
For a sedan, one sub, 1,100 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
| Net volume | 0.74 ft³ (21 L) |
|---|---|
| Qtc | 0.59 |
| Fc | 55 Hz |
| F3 (−3 dB, no cabin gain) | 71 Hz |
| Example box (outside) | 14 3/16″ × 14 3/16″ × 10 7/16″ |
Ported
| Net volume | 1.59 ft³ (45 L) |
|---|---|
| Tuning (Fb) | 33 Hz |
| Port | slot 2 3/16 × 14 5/16″, 43 5/16″ long |
| Port velocity at 1,100 W | 70 ft/s |
| F3 (−3 dB, no cabin gain) | 32 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 12 1/8″ |
Thiele/Small parameters
| Fs | 33 Hz |
|---|---|
| Qts | 0.35 |
| Qes | 0.42 |
| Qms | 2.2 |
| Vas | 1.34 ft³ |
| Re (one coil) | 3.6 Ω |
| Sd | 82.2 in² |
| Xmax | 0.33″ |
| Vd | 27.5 in³ calc. |
| Mms | 244 g calc. |
| BL | 20.8 T·m calc. |
| EBP | 79 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 87.1 dB calc. |
General
| Size | 12″ |
|---|---|
| Voice coils | dual 4 Ω |
| RMS power | 1,100 W |
Mounting dimensions
| Cutout diameter | 10 13/16″ |
|---|---|
| Mounting depth | 7 7/8″ |
| Overall diameter | 12 7/16″ |
“≈” 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 Audiopipe 12″ models
- Audiopipe TS-FA1200 12″ · dual 4 Ω