Cadence WB15D4
15″ subwoofer · dual 4 Ω · 1,500 W RMS
Fs 31.9 HzQts 0.46Vas 2.40 ft³Xmax 0.69″
Recommended box
For a sedan, one sub, 1,500 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 | 1.24 ft³ (35 L) |
|---|---|
| Qtc | 0.80 |
| Fc | 55 Hz |
| F3 (−3 dB, no cabin gain) | 52 Hz |
| Example box (outside) | 17 5/16″ × 17 5/16″ × 11 1/16″ |
Ported
| Net volume | 3.99 ft³ (113 L) |
|---|---|
| Tuning (Fb) | 30 Hz |
| Port | slot 3 3/4 × 16 11/16″, 39 15/16″ long |
| Port velocity at 1,500 W | 64 ft/s |
| F3 (−3 dB, no cabin gain) | 27 Hz |
| Example box (outside) | 31 1/2″ × 18 1/8″ × 21 7/16″ |
Thiele/Small parameters
| Fs | 31.9 Hz |
|---|---|
| Qts | 0.46 |
| Qes | 0.504 |
| Qms | 6 |
| Vas | 2.40 ft³ |
| Re (one coil) | ≈ 3.4 Ω |
| Sd | ≈ 124 in² |
| Xmax | 0.69″ |
| EBP | 63 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 88.4 dB calc. |
General
| Size | 15″ |
|---|---|
| Voice coils | dual 4 Ω |
| RMS power | 1,500 W |
Mounting dimensions
| Cutout diameter | ≈ 14″ |
|---|---|
| Mounting depth | 8 9/16″ |
Only Qts is published — Qms assumed to be 6 and Qes calculated (barely affects box design).
“≈” 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 Cadence 15″ models
- Cadence S1W15D2.v2 15″ · dual 2 Ω