Morel Ultimo SC 124 (SVC 4 ohm)

12″ subwoofer · 4 Ω · 600 W RMS

Fs 28 HzQts 0.41Vas 2.13 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 volume0.74 ft³ (21 L)
Qtc0.80
Fc55 Hz
F3 (−3 dB, no cabin gain)53 Hz
Example box (outside)13 3/8″ × 13 3/8″ × 11 5/8″
Open sealed box in designer

Ported

Net volume2.40 ft³ (68 L)
Tuning (Fb)30 Hz
Portslot 1 15/16 × 14 5/16″, 30 1/2″ 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 1/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs28 Hz
Qts0.41
Qes0.5
Qms2.14
Vas2.13 ft³
Re3 Ω
Sd69.4 in²
Xmax0.37″
Vd26 in³ calc.
Mms152 g calc.
BL12.7 T·m calc.
EBP56 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.2 dB calc.

General

Size12″
Voice coils4 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