Audiopipe TXX-BD2-15
15″ subwoofer · dual 4 Ω · 900 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 |
- Fs, Vas and Sd don't match the moving mass of 326 g (they give 536 g) — one of the spec sheet values is probably wrong.
Recommended box
For a sedan, one sub, 900 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 | 39 Hz |
| F3 (−3 dB, no cabin gain) | 37 Hz |
| Example box (outside) | 16 15/16″ × 16 15/16″ × 14 1/8″ |
Ported
deeper, louder| Tuning (Fb) | 30 Hz |
|---|---|
| Port | slot 2 3/8 × 16 5/16″, 35 3/8″ long |
| Port velocity at 900 W | 62 ft/s |
| F3 (−3 dB, no cabin gain) | 27 Hz |
| Example box (outside) | 31 1/2″ × 17 11/16″ × 15 7/16″ |
Deeper: 5.12 ft³ (145 L) tuned to 25 Hz, 31 1/2″ × 17 11/16″ × 24 5/8″ 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 | 15″ |
|---|---|
| Voice coils | dual 4 Ω |
| RMS power | 900 W |
| Fs | 22 Hz |
| Qts | 0.45 |
| Qes | 0.49 |
| Qms | 5.1 |
| Vas | 3.53 ft³ |
| Re (one coil) | 3.6 Ω |
|---|---|
| Sd | 131.8 in² |
| Xmax | 0.26″ |
| Vd | 33.7 in³ calc. |
| Mms | 536 g calc. |
| BL | 23.3 T·m calc. |
| EBP | 45 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 85.4 dB calc. |
Mounting dimensions
| Cutout diameter | 13 13/16″ |
|---|---|
| Mounting depth | 8 1/4″ |
| Overall diameter | 15 11/16″ |
“≈” 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 15″ models
- Audiopipe TS-AR15 15″ · 4 Ω
- Audiopipe TS-PP3-15-D4 15″ · dual 4 Ω
- Audiopipe TXX-APC-15 15″ · dual 4 Ω
- Audiopipe TXX-BD1-15 15″ · dual 4 Ω
- Audiopipe TXX-BD3-15 15″ · dual 4 Ω
- Audiopipe TXX-BD3-15D2 15″ · dual 2 Ω
- Audiopipe TXX-BD4-15 15″ · dual 4 Ω
Similar 15″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Alpine SWR-1542D (Type-R) 1.66 ft³ sealed · 2.83 ft³ ported
- Alpine SWR-1522D (Type-R) 1.25 ft³ sealed · 2.83 ft³ ported
- RE Audio XX15 D2 v2 1.77 ft³ sealed · 2.86 ft³ ported
- RE Audio XX15 D4 v2 1.77 ft³ sealed · 2.86 ft³ ported
- Diamond H152 1.34 ft³ sealed · 2.93 ft³ ported
- URAL Decibel 15 (1+1) 1.91 ft³ sealed · 3.18 ft³ ported
FAQ
What box does the Audiopipe TXX-BD2-15 need?
Recommended net volume: 1.59 ft³ sealed, 2.83 ft³ ported tuned to 30 Hz — for one sub in a sedan at 900 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Audiopipe TXX-BD2-15 Thiele/Small specs?
Fs 22 Hz, Qts 0.45, Vas 3.53 ft³, Xmax 0.26″, Sd 131.8 in².
What is the Audiopipe TXX-BD2-15 mounting depth?
Mounting depth is 8 1/4″, cutout diameter 13 13/16″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Audiopipe TXX-BD2-15 handle and how do I wire it?
RMS power rating: 900 W. Dual 4 Ω voice coils: series gives 8 Ω, parallel gives 2 Ω at the amp. Wiring for several subs and amp power — in the wiring calculator.