Ground Zero GZRW 6XSPL (2x2 Ohm)
6.5″ subwoofer · dual 2 Ω · 350 W RMS
Fs 49.5 HzQts 0.58Vas 0.08 ft³Xmax 0.43″
Recommended box
For a sedan, one sub, 350 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 | 0.21 ft³ (6 L) |
|---|---|
| Qtc | 0.67 |
| Fc | 58 Hz |
| F3 (−3 dB, no cabin gain) | 63 Hz |
| Example box (outside) | 9 1/16″ × 9 1/16″ × 8 3/16″ |
Ported
| Net volume | 0.42 ft³ (12 L) |
|---|---|
| Tuning (Fb) | 31 Hz |
| Port | slot 1 15/16 × 14 5/16″, 180 3/4″ long |
| Port velocity at 350 W | 25 ft/s |
| F3 (−3 dB, no cabin gain) | 28 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 16 1/8″ |
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 | 49.5 Hz |
|---|---|
| Qts | 0.58 |
| Qes | 0.621 |
| Qms | 7.87 |
| Vas | 0.08 ft³ |
| Re (one coil) | 2.12 Ω |
| Sd | 22.1 in² |
| Xmax | 0.43″ |
| Vd | 9.6 in³ calc. |
| Mms | 134 g calc. |
| BL | 11.9 T·m calc. |
| EBP | 80 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 78.4 dB calc. |
General
| Size | 6.5″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | 350 W |
Mounting dimensions
| Cutout diameter | 5 13/16″ |
|---|---|
| Mounting depth | 3 7/8″ |
| Overall diameter | 6 5/8″ |
Cone area (Sd) calculated from Fs, Vas and Mms: 22.1 in².
“≈” 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
- ground-zero-audio.com/wp-content/uploads/GZRW-6XSPL_OM_AWV2.2.pdf
- ground-zero-audio.com/en/gzrw-6xspl-2/
Other Ground Zero 6.5″ models
- Ground Zero GZHW 16SPL (2x2 Ohm) 6.5″ · dual 2 Ω
- Ground Zero GZIW 165 (4 Ohm) 6.5″ · 4 Ω
- Ground Zero GZIW 165X (4 Ohm) 6.5″ · 4 Ω
- Ground Zero GZIW 165X-II (4 Ohm) 6.5″ · 4 Ω