URAL TT 12 (2+2)

12″ subwoofer · dual 2 Ω · 500 W RMS

Fs 32.2 HzQts 0.63Vas 1.20 ft³Xmax 0.79″

Recommended box

For a sedan, one sub, 500 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 volume1.59 ft³ (45 L)
Qtc0.83
Fc43 Hz
F3 (−3 dB, no cabin gain)39 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 19 7/16″
Open sealed box in designer

Ported

Net volume2.68 ft³ (76 L)
Tuning (Fb)29 Hz
Portslot 1 15/16 × 14 5/16″, 29″ long
Port velocity at 500 W63 ft/s
F3 (−3 dB, no cabin gain)25 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 1/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32.2 Hz
Qts0.63
Qes0.77
Qms3.45
Vas1.20 ft³
Re (one coil)≈ 1.7 Ω
Sd69 in²
Xmax0.79″
Vd54.3 in³ calc.
Mms202 g calc.
BL9.5 T·m calc.
EBP42 — suits sealed calc.
Sensitivity, 1 W / 1 m83.7 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power500 W

Mounting dimensions

Ø12 5/16″cutout Ø11″mounting depth 5 7/8″magnet Ø6 1/8″
Cutout diameter11″
Mounting depth5 7/8″
Overall diameter12 5/16″
Magnet diameter6 1/8″

Cone area (Sd) calculated from Fs, Vas and Mms: 69 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