Massive Audio SUMMO124

12″ subwoofer · dual 4 Ω · 1,500 W RMS

Fs 35.3 HzQts 0.39Vas 1.04 ft³Xmax 0.51″

Recommended box

For a sedan, one sub, 1,500 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 volume0.79 ft³ (22.5 L)
Qtc0.60
Fc54 Hz
F3 (−3 dB, no cabin gain)68 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 10 7/16″
Open sealed box in designer

Ported

Net volume1.59 ft³ (45 L)
Tuning (Fb)33 Hz
Portslot 2 3/16 × 14 5/16″, 43 5/16″ long
Port velocity at 1,500 W86 ft/s
F3 (−3 dB, no cabin gain)31 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 12 1/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35.3 Hz
Qts0.39
Qes0.443
Qms3.52
Vas1.04 ft³
Re (one coil)3.4 Ω
Sd82.2 in²
Xmax0.51″
Vd42 in³ calc.
Mms274 g calc.
BL21.6 T·m calc.
EBP80 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.7 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power1,500 W

Mounting dimensions

Ø12 13/16″cutout Ø11 1/4″mounting depth 7 7/8″magnet Ø≈ 7 5/16″
Cutout diameter11 1/4″
Mounting depth7 7/8″
Overall diameter12 13/16″

“≈” 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 Massive Audio 12″ models