Audiopipe TXX-BD3-8
8″ subwoofer · 4 Ω · 250 W RMS
| Source | web.archive.org · manufacturer data |
|---|---|
| Checked against source | October 2026 |
| Thiele/Small parameters | complete |
| Mounting dimensions | 0 of 4 — missing: cutout, mounting depth, frame outer diameter, magnet diameter; the designer will use an estimate |
Recommended box
For a sedan, one sub, 250 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) | Dry and tight · 0.49 |
|---|---|
| Fc | 57 Hz |
| F3 (−3 dB, no cabin gain) | 95 Hz |
| Example box (outside) | 10 5/8″ × 10 5/8″ × 7 7/8″ |
Ported
deeper, louder| Tuning (Fb) | 41 Hz |
|---|---|
| Port | slot 1 9/16 × 14 5/16″, 33 11/16″ long |
| Port velocity at 250 W | 42 ft/s |
| F3 (−3 dB, no cabin gain) | 36 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 7 13/16″ |
Deeper: 0.60 ft³ (17 L) tuned to 39 Hz, 18 1/8″ × 15 3/4″ × 6 1/2″ 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 | 8″ |
|---|---|
| Voice coils | 4 Ω |
| RMS power | 250 W |
| Fs | 44 Hz |
| Qts | 0.37 |
| Qes | 0.45 |
| Qms | 2.2 |
| Vas | 0.19 ft³ |
| Re | 3.6 Ω |
|---|---|
| Sd | 31.6 in² |
| Xmax | 0.20″ |
| Vd | 6.2 in³ calc. |
| Mms | 140 g calc. |
| BL | 17.6 T·m calc. |
| EBP | 98 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 82.2 dB calc. |
Mounting dimensions
| Cutout diameter | ≈ 7 5/16″ |
|---|---|
| Mounting depth | ≈ 3 15/16″ |
“≈” 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 8″ models
- Audiopipe TS-CAR8 8″ · 4 Ω
- Audiopipe TS-FA800 8″ · dual 4 Ω
Similar 8″ subwoofers from other brands
Close in Fs, Qts and Vas — a box of similar volume will suit them.
- SoundQubed HDX 8 D2 0.28 ft³ sealed · 0.88 ft³ ported
- SoundQubed HDX 8 D4 0.28 ft³ sealed · 0.88 ft³ ported
- URAL Patriot 8 (2+2) 0.28 ft³ sealed · 0.46 ft³ ported
- ESX QE822 (2x2 Ohm) 0.32 ft³ sealed · 0.99 ft³ ported
- ESX QXE8D2 (2x2 Ohm) 0.32 ft³ sealed · 0.99 ft³ ported
- Sundown Audio U-8 D2 0.32 ft³ sealed · 0.67 ft³ ported
FAQ
What box does the Audiopipe TXX-BD3-8 need?
Recommended net volume: 0.28 ft³ sealed, 0.95 ft³ ported tuned to 41 Hz — for one sub in a sedan at 250 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.
What are the Audiopipe TXX-BD3-8 Thiele/Small specs?
Fs 44 Hz, Qts 0.37, Vas 0.19 ft³, Xmax 0.20″, Sd 31.6 in².
How much power does the Audiopipe TXX-BD3-8 handle and how do I wire it?
RMS power rating: 250 W. Wiring for several subs and amp power — in the wiring calculator.