ACV SW PRO122D
12″ subwoofer · dual 2 Ω · 500 W RMS
Fs 28 HzQts 0.40Vas 1.73 ft³Xmax 0.75″
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 | 0.64 ft³ (18 L) |
|---|---|
| Qtc | 0.78 |
| Fc | 54 Hz |
| F3 (−3 dB, no cabin gain) | 53 Hz |
| Example box (outside) | 14 9/16″ × 14 9/16″ × 8 13/16″ |
Ported
| Net volume | 1.94 ft³ (55 L) |
|---|---|
| Tuning (Fb) | 30 Hz |
| Port | slot 1 3/4 × 14 5/16″, 34 11/16″ long |
| Port velocity at 500 W | 61 ft/s |
| F3 (−3 dB, no cabin gain) | 28 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 12 3/8″ |
Thiele/Small parameters
| Fs | 28 Hz |
|---|---|
| Qts | 0.40 |
| Qes | 0.44 |
| Qms | 5 |
| Vas | 1.73 ft³ |
| Re (one coil) | 1.9 Ω |
| Sd | 70.3 in² |
| Xmax | 0.75″ |
| Vd | 52.6 in³ calc. |
| Mms | 192 g calc. |
| BL | 12.1 T·m calc. |
| EBP | 64 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 85.9 dB calc. |
General
| Size | 12″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | 500 W |
Mounting dimensions
| Cutout diameter | 11 1/4″ |
|---|---|
| Mounting depth | 6 1/8″ |
| Overall diameter | 12 7/16″ |
Cone area (Sd) calculated from Fs, Vas and Mms: 70.3 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.