Morel Ultimo 124 (SVC 4 ohm)

12″ subwoofer · 4 Ω · 1,000 W RMS

Fs 26 HzQts 0.42Vas 2.61 ft³Xmax 0.49″

Recommended box

For a sedan, one sub, 1,000 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 volume0.99 ft³ (28 L)
Qtc0.80
Fc50 Hz
F3 (−3 dB, no cabin gain)47 Hz
Example box (outside)13 3/4″ × 13 3/4″ × 13 13/16″
Open sealed box in designer

Ported

Net volume2.68 ft³ (76 L)
Tuning (Fb)29 Hz
Portslot 2 9/16 × 14 5/16″, 38 7/16″ long
Port velocity at 1,000 W62 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 16 5/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs26 Hz
Qts0.42
Qes0.56
Qms1.69
Vas2.61 ft³
Re3.5 Ω
Sd69.4 in²
Xmax0.49″
Vd34.2 in³ calc.
Mms144 g calc.
BL12.1 T·m calc.
EBP46 — suits sealed calc.
Sensitivity, 1 W / 1 m85.7 dB calc.

General

Size12″
Voice coils4 Ω
RMS power1,000 W

Mounting dimensions

Ø12″cutout Ø10 11/16″mounting depth 5 13/16″magnet Ø≈ 6 15/16″
Cutout diameter10 11/16″
Mounting depth5 13/16″
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