Audiopipe TXX-APC-12
12″ subwoofer · dual 4 Ω · 800 W RMS
| Source | cdn.shopify.com, audiopipe.com · 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, 800 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 | 54 Hz |
| F3 (−3 dB, no cabin gain) | 51 Hz |
| Example box (outside) | 14 3/16″ × 14 3/16″ × 10 7/16″ |
Ported
deeper, louder| Tuning (Fb) | 34 Hz |
|---|---|
| Port | slot 1 3/4 × 14 5/16″, 40 3/4″ long |
| Port velocity at 800 W | 62 ft/s |
| F3 (−3 dB, no cabin gain) | 31 Hz |
| Example box (outside) | 22 5/16″ × 15 3/4″ × 14 3/16″ |
Deeper: 2.19 ft³ (62 L) tuned to 30 Hz, 31 1/2″ × 15 3/4″ × 14 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 | 12″ |
|---|---|
| Voice coils | dual 4 Ω |
| RMS power | 800 W |
| Fs | 37 Hz |
| Qts | 0.54 |
| Qes | 0.68 |
| Qms | 2.7 |
| Vas | 0.85 ft³ |
| Re (one coil) | 3.6 Ω |
|---|---|
| Sd | 82.2 in² |
| Xmax | 0.24″ |
| Vd | 19.4 in³ calc. |
| Mms | 307 g calc. |
| BL | 19.4 T·m calc. |
| EBP | 54 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 84.5 dB calc. |
Mounting dimensions
| Cutout diameter | 10 13/16″ |
|---|---|
| Mounting depth | 7″ |
| Overall diameter | 12 13/16″ |
“≈” 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
- cdn.shopify.com/s/files/1/0051/8478/2371/files/TXX-APC_manual.pdf?v=1691594746
- audiopipe.com/pages/manuals
Other Audiopipe 12″ models
- Audiopipe TS-FA1200 12″ · dual 4 Ω
- Audiopipe TXX-BD1-12 12″ · dual 4 Ω
- Audiopipe TXX-BD2-12 12″ · dual 4 Ω
- Audiopipe TXX-BD3-12 12″ · dual 4 Ω
- Audiopipe TXX-BD3-12D2 12″ · dual 2 Ω
- Audiopipe TXX-BD4-12 12″ · dual 4 Ω
- Audiopipe TXX-BDC4-12 12″ · dual 4 Ω
Similar 12″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- Magnum MHW 12-22DCLE 0.92 ft³ sealed · 1.24 ft³ ported
- Swat EXE-P12D1 0.83 ft³ sealed · 1.20 ft³ ported
- MTX Audio T9512-44 0.92 ft³ sealed · 1.31 ft³ ported
- Massive Audio KILOX124 0.92 ft³ sealed · 1.27 ft³ ported
- Quantum Audio QW5000/12D4 0.74 ft³ sealed · 1.31 ft³ ported
- American Bass HD-1222 0.85 ft³ sealed · 2.51 ft³ ported
FAQ
What box does the Audiopipe TXX-APC-12 need?
Recommended net volume: 0.74 ft³ sealed, 1.31 ft³ ported tuned to 34 Hz — for one sub in a sedan at 800 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Audiopipe TXX-APC-12 Thiele/Small specs?
Fs 37 Hz, Qts 0.54, Vas 0.85 ft³, Xmax 0.24″, Sd 82.2 in².
What is the Audiopipe TXX-APC-12 mounting depth?
Mounting depth is 7″, cutout diameter 10 13/16″. The inside depth of the box must exceed the mounting depth by at least 1″.
How much power does the Audiopipe TXX-APC-12 handle and how do I wire it?
RMS power rating: 800 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.