URAL Pobeda 15 (2+2)

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

Fs 31.6 HzQts 0.40Vas 3.51 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 volume1.24 ft³ (35 L)
Qtc0.79
Fc62 Hz
F3 (−3 dB, no cabin gain)60 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 11 1/16″
Open sealed box in designer

Ported

Net volume3.92 ft³ (111 L)
Tuning (Fb)33 Hz
Portslot 3 3/8 × 16 11/16″, 28 13/16″ long
Port velocity at 1,200 W63 ft/s
F3 (−3 dB, no cabin gain)31 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 19 3/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs31.6 Hz
Qts0.40
Qes0.46
Qms3.37
Vas3.51 ft³
Re (one coil)≈ 1.7 Ω
Sd135.8 in²
Xmax0.98″
Vd133.7 in³ calc.
Mms278 g calc.
BL14.3 T·m calc.
EBP69 — sealed or ported calc.
Sensitivity, 1 W / 1 m90.3 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power1,200 W

Mounting dimensions

Ø15 9/16″cutout Ø14 1/16″mounting depth 7″magnet Ø≈ 9 1/8″
Cutout diameter14 1/16″
Mounting depth7″
Overall diameter15 9/16″

Cone area (Sd) calculated from Fs, Vas and Mms: 135.8 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 15″ models