Audiopipe TXX-BDC4-6
6.5″ subwoofer · dual 4 Ω · 250 W RMS
Fs 60 HzQts 0.49Vas 0.11 ft³Xmax 0.17″
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
| Net volume | 0.18 ft³ (5 L) |
|---|---|
| Qtc | 0.62 |
| Fc | 76 Hz |
| F3 (−3 dB, no cabin gain) | 91 Hz |
| Example box (outside) | 9 1/16″ × 9 1/16″ × 7 3/16″ |
Ported
| Net volume | 0.42 ft³ (12 L) |
|---|---|
| Tuning (Fb) | 40 Hz |
| Port | slot 1 15/16 × 14 5/16″, 106 13/16″ long |
| Port velocity at 250 W | 22 ft/s |
| F3 (−3 dB, no cabin gain) | 36 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 11 1/16″ |
The volume and tuning are the recommendation, but the port doesn’t fit this example box. Size the box and port in the designer.
Open ported box in designerThiele/Small parameters
| Fs | 60 Hz |
|---|---|
| Qts | 0.49 |
| Qes | 0.63 |
| Qms | 2.2 |
| Vas | 0.11 ft³ |
| Re (one coil) | 3.6 Ω |
| Sd | 21.2 in² |
| Xmax | 0.17″ |
| Vd | 3.6 in³ calc. |
| Mms | 62 g calc. |
| BL | 11.6 T·m calc. |
| EBP | 95 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 82.1 dB calc. |
General
| Size | 6.5″ |
|---|---|
| Voice coils | dual 4 Ω |
| RMS power | 250 W |
Mounting dimensions
| Cutout diameter | 6″ |
|---|---|
| Mounting depth | 4 3/4″ |
| Overall diameter | 7 1/16″ |
“≈” 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.