Resilient Sounds RS 8 V2 D4
8″ subwoofer · dual 4 Ω · 500 W RMS
Fs 35.7 HzQts 0.41Vas 0.30 ft³
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 | 0.28 ft³ (8 L) |
|---|---|
| Qtc | 0.59 |
| Fc | 51 Hz |
| F3 (−3 dB, no cabin gain) | 65 Hz |
| Example box (outside) | 10 1/4″ × 10 1/4″ × 8 1/2″ |
Ported
| Net volume | 0.57 ft³ (16 L) |
|---|---|
| Tuning (Fb) | 31 Hz |
| Port | slot 1 15/16 × 14 5/16″, 134 1/2″ long |
| Port velocity at 500 W | 31 ft/s |
| F3 (−3 dB, no cabin gain) | 29 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 13 5/8″ |
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 | 35.7 Hz |
|---|---|
| Qts | 0.41 |
| Qes | 0.488 |
| Qms | 2.67 |
| Vas | 0.30 ft³ |
| Re (one coil) | 4 Ω |
| Sd | 30 in² |
| Xmax | ≈ 0.39″ |
| Mms | 123 g calc. |
| BL | 15.1 T·m calc. |
| EBP | 73 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 81 dB calc. |
General
| Size | 8″ |
|---|---|
| Voice coils | dual 4 Ω |
| RMS power | 500 W |
Mounting dimensions
| Cutout diameter | 7 1/4″ |
|---|---|
| Mounting depth | 5″ |
Cone area (Sd) calculated from Fs, Vas and Mms: 30 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 8″ models
- Resilient Sounds Gold 8 D2 8″ · dual 2 Ω
- Resilient Sounds Gold 8 D4 8″ · dual 4 Ω