Morel Ultimo Titanium 124 (SVC 4 ohm)

12″ subwoofer · 4 Ω

Fs 24 HzQts 0.46Vas 3.64 ft³

Recommended box

For a sedan, one sub, 300 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 volume1.66 ft³ (47 L)
Qtc0.83
Fc43 Hz
F3 (−3 dB, no cabin gain)40 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 8 1/2″
Open sealed box in designer

Ported

Net volume2.83 ft³ (80 L)
Tuning (Fb)30 Hz
Portslot 1 9/16 × 14 5/16″, 19 13/16″ long
Port velocity at 300 W59 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 14 9/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs24 Hz
Qts0.46
Qes0.5
Qms6.53
Vas3.64 ft³
Re≈ 3.4 Ω
Sd73 in²
Xmax≈ 0.39″
Mms134 g calc.
BL11.7 T·m calc.
EBP48 — suits sealed calc.
Sensitivity, 1 W / 1 m86.5 dB calc.

General

Size12″
Voice coils4 Ω
RMS power—

Mounting dimensions

Ø≈ 12 5/16″cutout ≈ Ø11 1/8″mounting depth ≈ 5 7/8″magnet Ø≈ 7 3/16″
Cutout diameter≈ 11 1/8″
Mounting depth≈ 5 7/8″

“≈” 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