Hifonics ZRX8D2
8″ subwoofer · dual 2 Ω · 600 W RMS
Fs 40.4 HzQts 0.43Vas 0.22 ft³Xmax 0.49″
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 | 0.28 ft³ (8 L) |
|---|---|
| Qtc | 0.57 |
| Fc | 54 Hz |
| F3 (−3 dB, no cabin gain) | 71 Hz |
| Example box (outside) | 10 1/4″ × 10 1/4″ × 8 1/2″ |
Ported
| Net volume | 0.60 ft³ (17 L) |
|---|---|
| Tuning (Fb) | 30 Hz |
| Port | slot 1 15/16 × 14 5/16″, 135 3/16″ long |
| Port velocity at 600 W | 37 ft/s |
| F3 (−3 dB, no cabin gain) | 28 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 13 13/16″ |
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 | 40.4 Hz |
|---|---|
| Qts | 0.43 |
| Qes | 0.47 |
| Qms | 5.26 |
| Vas | 0.22 ft³ |
| Re (one coil) | 2 Ω |
| Sd | 31.6 in² |
| Xmax | 0.49″ |
| Vd | 15.6 in³ calc. |
| Mms | 150 g calc. |
| BL | 12.7 T·m calc. |
| EBP | 86 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 81.3 dB calc. |
General
| Size | 8″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | 600 W |
Mounting dimensions
| Cutout diameter | 7 1/4″ |
|---|---|
| Mounting depth | 5 11/16″ |
| Overall diameter | 8 11/16″ |
“≈” 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 Hifonics 8″ models
- Hifonics ZST8D2 8″ · dual 2 Ω
- Hifonics ZST8D4 8″ · dual 4 Ω
- Hifonics ZXS8D2 8″ · dual 2 Ω