URAL AS-W12SW Grand2 (2+2)

12″ subwoofer · dual 2 Ω · 700 W RMS

Fs 30.7 HzQts 0.48Vas 2.05 ft³Xmax 0.79″

Recommended box

For a sedan, one sub, 700 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 volume1.13 ft³ (32 L)
Qtc0.80
Fc52 Hz
F3 (−3 dB, no cabin gain)49 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 13 3/4″
Open sealed box in designer

Ported

Net volume2.93 ft³ (83 L)
Tuning (Fb)30 Hz
Portslot 2 9/16 × 14 5/16″, 32 3/16″ long
Port velocity at 700 W63 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 16 15/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30.7 Hz
Qts0.48
Qes0.5
Qms10.04
Vas2.05 ft³
Re (one coil)2.4 Ω
Sd≈ 76 in²
Xmax0.79″
EBP61 — sealed or ported calc.
Sensitivity, 1 W / 1 m87.3 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power700 W

Mounting dimensions

Ø≈ 12 3/8″cutout Ø11 1/4″mounting depth 6 3/16″magnet Ø≈ 7 5/16″
Cutout diameter11 1/4″
Mounting depth6 3/16″

Judging by its value, the published Re is for both coils in series — converted to per coil.

“≈” 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 URAL 12″ models