Massive Audio BOA121

12″ subwoofer · dual 1 Ω · 6,000 W RMS

Fs 39 HzQts 0.57Vas 0.42 ft³Xmax 0.98″

Recommended box

For a sedan, one sub, 6,000 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 volume0.94 ft³ (26.5 L)
Qtc0.69
Fc47 Hz
F3 (−3 dB, no cabin gain)50 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 12 1/2″
Open sealed box in designer

Ported

Net volume1.34 ft³ (38 L)
Tuning (Fb)29 Hz
Port2 round ports Ø2 1/2″, 21 3/4″ long
Port velocity at 6,000 W493 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)19 3/8″ × 15 3/4″ × 12 3/8″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs39 Hz
Qts0.57
Qes0.62
Qms7.08
Vas0.42 ft³
Re (one coil)0.9 Ω
Sd69.8 in²
Xmax0.98″
Vd68.7 in³ calc.
Mms405 g calc.
BL12 T·m calc.
EBP63 — sealed or ported calc.
Sensitivity, 1 W / 1 m82.5 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power6,000 W

Mounting dimensions

Ø12 1/2″cutout Ø11″mounting depth 10″magnet Ø≈ 7 3/16″
Cutout diameter11″
Mounting depth10″
Overall diameter12 1/2″

“≈” 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