URAL Pobeda 12 (2+2)

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

Fs 35.2 HzQts 0.42Vas 0.91 ft³Xmax 0.98″

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 volume0.71 ft³ (20 L)
Qtc0.64
Fc53 Hz
F3 (−3 dB, no cabin gain)62 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 10 1/16″
Open sealed box in designer

Ported

Net volume1.45 ft³ (41 L)
Tuning (Fb)32 Hz
Portslot 1 3/4 × 14 5/16″, 41 5/8″ long
Port velocity at 1,200 W86 ft/s
F3 (−3 dB, no cabin gain)30 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 10 7/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35.2 Hz
Qts0.42
Qes0.47
Qms4.2
Vas0.91 ft³
Re (one coil)≈ 1.7 Ω
Sd75.8 in²
Xmax0.98″
Vd74.6 in³ calc.
Mms269 g calc.
BL14.7 T·m calc.
EBP75 — sealed or ported calc.
Sensitivity, 1 W / 1 m85.8 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power1,200 W

Mounting dimensions

Ø12 7/16″cutout Ø11 1/8″mounting depth 5 11/16″magnet Ø≈ 7 3/16″
Cutout diameter11 1/8″
Mounting depth5 11/16″
Overall diameter12 7/16″

Cone area (Sd) calculated from Fs, Vas and Mms: 75.8 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

Other URAL 12″ models