Sony XS-GSW121D
12″ subwoofer · dual 4 Ω · 520 W RMS
Fs 32 HzQts 0.63Vas 1.80 ft³Xmax 0.35″
The published specs don’t add up:
- Re 0.73 Ω doesn't look like a 4 Ω coil — check the spec sheet.
Recommended box
For a sedan, one sub, 520 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 | 1.80 ft³ (51 L) |
|---|---|
| Qtc | 0.89 |
| Fc | 45 Hz |
| F3 (−3 dB, no cabin gain) | 40 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 9 1/16″ |
Ported
| Net volume | 3.04 ft³ (86 L) |
|---|---|
| Tuning (Fb) | 32 Hz |
| Port | slot 2 3/16 × 14 5/16″, 22 1/16″ long |
| Port velocity at 520 W | 64 ft/s |
| F3 (−3 dB, no cabin gain) | 28 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 16″ |
Thiele/Small parameters
| Fs | 32 Hz |
|---|---|
| Qts | 0.63 |
| Qes | 0.68 |
| Qms | 8.1 |
| Vas | 1.80 ft³ |
| Re (one coil) | 0.73 Ω |
| Sd | 78.5 in² |
| Xmax | 0.35″ |
| Vd | 27.5 in³ calc. |
| Mms | 176 g calc. |
| BL | 6.2 T·m calc. |
| EBP | 47 — suits sealed calc. |
| Sensitivity, 1 W / 1 m | 85.9 dB calc. |
General
| Size | 12″ |
|---|---|
| Voice coils | dual 4 Ω |
| RMS power | 520 W |
Mounting dimensions
| Cutout diameter | 11 1/16″ |
|---|---|
| Mounting depth | 5 9/16″ |
| Overall diameter | 12 3/4″ |
“≈” 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 Sony 12″ models
- Sony XS-GTR120L 12″ · 4 Ω
- Sony XS-GTR121L 12″ · 4 Ω
- Sony XS-W122ES 12″ · 2 Ω
- Sony XS-W124ES 12″ · 4 Ω