URAL Patriot 15 (2+2)

15″ subwoofer · dual 2 Ω · 2,000 W RMS

Fs 27.9 HzQts 0.36Vas 2.66 ft³Xmax 1.18″

Recommended box

For a sedan, one sub, 2,000 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 volume1.09 ft³ (31 L)
Qtc0.66
Fc52 Hz
F3 (−3 dB, no cabin gain)59 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 10 1/8″
Open sealed box in designer

Ported

Net volume2.30 ft³ (65 L)
Tuning (Fb)31 Hz
Portslot 2 3/4 × 16 11/16″, 50 1/8″ long
Port velocity at 2,000 W72 ft/s
F3 (−3 dB, no cabin gain)31 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 15 7/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs27.9 Hz
Qts0.36
Qes0.39
Qms4.04
Vas2.66 ft³
Re (one coil)≈ 1.7 Ω
Sd119.9 in²
Xmax1.18″
Vd141.6 in³ calc.
Mms366 g calc.
BL16.7 T·m calc.
EBP72 — sealed or ported calc.
Sensitivity, 1 W / 1 m88.2 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power2,000 W

Mounting dimensions

Ø≈ 15 3/16″cutout ≈ Ø14″mounting depth ≈ 7 1/16″magnet Ø6 11/16″
Cutout diameter≈ 14″
Mounting depth≈ 7 1/16″
Magnet diameter6 11/16″

Cone area (Sd) calculated from Fs, Vas and Mms: 119.9 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