Memphis Car Audio MJP1222 (MOJO Pro 12" DVC 2ohm)

12″ subwoofer · dual 2 Ω · 750 W RMS

30.8 HzFs, resonance
0.55Qts
1.47 ft³Vas
0.51″Xmax
750 WRMS

Recommended box

For a sedan, one sub, 750 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

smaller, tighter
1.27 ft³ (36 L)
Net volume
Qtc0.80
Fc45 Hz
F3 (−3 dB, no cabin gain)43 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 15 3/16″
Open sealed box in designer

Ported

deeper, louder
3.18 ft³ (90 L)
Net volume
Tuning (Fb)27 Hz
Portslot 2 9/16 × 14 5/16″, 37 5/16″ long
Port velocity at 750 W65 ft/s
F3 (−3 dB, no cabin gain)24 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 18 1/2″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30.8 Hz
Qts0.55
Qes0.594
Qms6.69
Vas1.47 ft³
Re (one coil)2 Ω
Sd82.3 in²
Xmax0.51″
Vd42.1 in³ calc.
Mms256 g calc.
BL12.9 T·m calc.
EBP52 — sealed or ported calc.
Sensitivity, 1 W / 1 m85.1 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power750 W

Mounting dimensions

Ø12 15/16″cutout Ø11 5/16″mounting depth 6 1/4″magnet Ø6 11/16″
Cutout diameter11 5/16″
Mounting depth6 1/4″
Overall diameter12 15/16″
Magnet diameter6 11/16″

“≈” 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 Memphis Car Audio 12″ models