PSI Platform 1 15 D2
15″ subwoofer · dual 2 Ω · 600 W RMS
Fs 26 HzQts 0.74Vas 4.04 ft³Xmax 1.10″
Recommended box
For a sedan, one sub, 600 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 | 2.93 ft³ (83 L) |
|---|---|
| Qtc | 1.14 |
| Fc | 40 Hz |
| F3 (−3 dB, no cabin gain) | 31 Hz |
| Example box (outside) | 31 1/2″ × 18 1/8″ × 12 1/8″ |
Ported
| Net volume | 4.98 ft³ (141 L) |
|---|---|
| Tuning (Fb) | 31 Hz |
| Port | slot 2 3/8 × 16 11/16″, 16 13/16″ long |
| Port velocity at 600 W | 62 ft/s |
| F3 (−3 dB, no cabin gain) | 26 Hz |
| Example box (outside) | 31 1/2″ × 18 1/8″ × 20 13/16″ |
Thiele/Small parameters
| Fs | 26 Hz |
|---|---|
| Qts | 0.74 |
| Qes | 0.83 |
| Qms | 6.56 |
| Vas | 4.04 ft³ |
| Re (one coil) | 1.95 Ω |
| Sd | 128.7 in² |
| Xmax | 1.10″ |
| Vd | 141.8 in³ calc. |
| Mms | 320 g calc. |
| BL | 11.1 T·m calc. |
| EBP | 31 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 85.8 dB calc. |
General
| Size | 15″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | 600 W |
Mounting dimensions
| Cutout diameter | 14″ |
|---|---|
| Mounting depth | 7 3/4″ |
| Overall diameter | 15 1/2″ |
Judging by its value, the published Re is for both coils in series — converted to per coil.
“≈” 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 PSI 15″ models
- PSI Bass-line 15 15″ · 3 Ω
- PSI Platform 2 15 D2 15″ · dual 2 Ω