Match PP 72W-D
6.5″ subwoofer · dual 2 Ω · 100 W RMS
Fs 53 HzQts 0.36Vas 0.28 ft³Xmax 0.20″
Recommended box
For a sedan, one sub, 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 | 0.18 ft³ (5 L) |
|---|---|
| Qtc | 0.59 |
| Fc | 85 Hz |
| F3 (−3 dB, no cabin gain) | 111 Hz |
| Example box (outside) | 8 1/4″ × 8 1/4″ × 8 9/16″ |
Ported
| Net volume | 0.39 ft³ (11 L) |
|---|---|
| Tuning (Fb) | 49 Hz |
| Port | slot 1 15/16 × 14 5/16″, 76 7/16″ long |
| Port velocity at 100 W | 15 ft/s |
| F3 (−3 dB, no cabin gain) | 47 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 8 13/16″ |
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 | 53 Hz |
|---|---|
| Qts | 0.36 |
| Qes | 0.41 |
| Qms | 3.3 |
| Vas | 0.28 ft³ |
| Re (one coil) | 1.6 Ω |
| Sd | 19.4 in² |
| Xmax | 0.20″ |
| Vd | 3.8 in³ calc. |
| Mms | 25 g calc. |
| BL | 5.7 T·m calc. |
| EBP | 129 — suits ported calc. |
| Sensitivity, 1 W / 1 m | 86.6 dB calc. |
General
| Size | 6.5″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | 100 W |
Mounting dimensions
| Cutout diameter | 5 1/4″ |
|---|---|
| Mounting depth | 3 1/8″ |
| Overall diameter | 6 1/4″ |
“≈” 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.