Resilient Sounds RS 12 D4
12″ subwoofer · dual 4 Ω · 500 W RMS
Fs 27.1 HzQts 0.38Vas 2.08 ft³Xmax 0.67″
Recommended box
For a sedan, one sub, 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 | 0.71 ft³ (20 L) |
|---|---|
| Qtc | 0.76 |
| Fc | 54 Hz |
| F3 (−3 dB, no cabin gain) | 53 Hz |
| Example box (outside) | 14 3/16″ × 14 3/16″ × 10 1/16″ |
Ported
| Net volume | 2.01 ft³ (57 L) |
|---|---|
| Tuning (Fb) | 30 Hz |
| Port | slot 1 3/4 × 14 5/16″, 33 5/16″ long |
| Port velocity at 500 W | 61 ft/s |
| F3 (−3 dB, no cabin gain) | 29 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 12 9/16″ |
Thiele/Small parameters
| Fs | 27.1 Hz |
|---|---|
| Qts | 0.38 |
| Qes | 0.42 |
| Qms | 4.56 |
| Vas | 2.08 ft³ |
| Re (one coil) | 3.8 Ω |
| Sd | 78.7 in² |
| Xmax | 0.67″ |
| Vd | 52.7 in³ calc. |
| Mms | 214 g calc. |
| BL | 18.2 T·m calc. |
| EBP | 65 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 86.5 dB calc. |
General
| Size | 12″ |
|---|---|
| Voice coils | dual 4 Ω |
| RMS power | 500 W |
Mounting dimensions
| Cutout diameter | 11 1/8″ |
|---|---|
| Mounting depth | 6″ |
Cone area (Sd) calculated from Fs, Vas and Mms: 78.7 in².
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 Resilient Sounds 12″ models
- Resilient Sounds Gold 12 D4 12″ · dual 4 Ω
- Resilient Sounds Onyx 12 D1 12″ · dual 1 Ω
- Resilient Sounds Platinum 12 D1 12″ · dual 1 Ω
- Resilient Sounds RS 12 V2 D4 12″ · dual 4 Ω