Morel Ultimo SC 122 (SVC 2 ohm)

12″ subwoofer · 2 Ω · 600 W RMS

Fs 27.5 HzQts 0.46Vas 2.43 ft³Xmax 0.37″

Recommended box

For a sedan, one sub, 600 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 volume1.20 ft³ (34 L)
Qtc0.80
Fc48 Hz
F3 (−3 dB, no cabin gain)46 Hz
Example box (outside)13 3/8″ × 13 3/8″ × 17 3/16″
Open sealed box in designer

Ported

Net volume2.68 ft³ (76 L)
Tuning (Fb)30 Hz
Portslot 1 15/16 × 14 5/16″, 26 13/16″ long
Port velocity at 600 W63 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 14 7/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs27.5 Hz
Qts0.46
Qes0.59
Qms2.05
Vas2.43 ft³
Re1.3 Ω
Sd69.4 in²
Xmax0.37″
Vd26 in³ calc.
Mms138 g calc.
BL7.3 T·m calc.
EBP47 — suits sealed calc.
Sensitivity, 1 W / 1 m85.9 dB calc.

General

Size12″
Voice coils2 Ω
RMS power600 W

Mounting dimensions

Ø12″cutout Ø10 3/8″mounting depth 6″magnet Ø≈ 6 3/4″
Cutout diameter10 3/8″
Mounting depth6″
Overall diameter12″

“≈” 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 Morel 12″ models