Power Acoustik GW3-12

12″ subwoofer · dual 2 Ω · 1,200 W RMS

Fs 34.3 HzQts 1.21Vas 2.15 ft³
The published specs don’t add up:

Recommended box

For a sedan, one sub, 1,200 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 volume1.73 ft³ (49 L)
Qtc1.82
Fc51 Hz
F3 (−3 dB, no cabin gain)36 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 19 3/4″
Open sealed box in designer

Ported

Net volume2.93 ft³ (83 L)
Tuning (Fb)42 Hz
Portslot 2 15/16 × 14 5/16″, 16 1/2″ long
Port velocity at 1,200 W65 ft/s
F3 (−3 dB, no cabin gain)34 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 7/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs34.3 Hz
Qts1.21
Qes1.577
Qms5.29
Vas2.15 ft³
Re (one coil)2.14 Ω
Sd≈ 76 in²
Xmax≈ 0.39″
EBP22 — suits sealed calc.
Sensitivity, 1 W / 1 m83.9 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power1,200 W

Mounting dimensions

Ø≈ 12 11/16″cutout Ø11 1/2″mounting depth 6 1/2″magnet Ø≈ 7 1/2″
Cutout diameter11 1/2″
Mounting depth6 1/2″

The spec sheet's Sd of 113.1 in² is the area of a 12″ circle, not the cone's radiating area — not used.

“≈” 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 Power Acoustik 12″ models