Cadence S2W12D4
12″ subwoofer · dual 4 Ω · 600 W RMS
Fs 26.9 HzQts 0.51Vas 1.06 ft³Xmax 0.63″
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 | 0.74 ft³ (21 L) |
|---|---|
| Qtc | 0.80 |
| Fc | 42 Hz |
| F3 (−3 dB, no cabin gain) | 40 Hz |
| Example box (outside) | 14 3/16″ × 14 3/16″ × 10 7/16″ |
Ported
| Net volume | 2.37 ft³ (67 L) |
|---|---|
| Tuning (Fb) | 25 Hz |
| Port | slot 1 15/16 × 14 5/16″, 46 5/8″ long |
| Port velocity at 600 W | 65 ft/s |
| F3 (−3 dB, no cabin gain) | 22 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 15 5/16″ |
Thiele/Small parameters
| Fs | 26.9 Hz |
|---|---|
| Qts | 0.51 |
| Qes | 0.563 |
| Qms | 6 |
| Vas | 1.06 ft³ |
| Re (one coil) | ≈ 3.4 Ω |
| Sd | ≈ 76 in² |
| Xmax | 0.63″ |
| EBP | 48 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 82.2 dB calc. |
General
| Size | 12″ |
|---|---|
| Voice coils | dual 4 Ω |
| RMS power | 600 W |
Mounting dimensions
| Cutout diameter | ≈ 11 1/8″ |
|---|---|
| Mounting depth | 6 1/2″ |
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.