Massive Audio KILOX122

12″ subwoofer · dual 2 Ω · 1,000 W RMS

Fs 37.2 HzQts 0.50Vas 0.78 ft³Xmax 0.55″

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 volume0.71 ft³ (20 L)
Qtc0.72
Fc54 Hz
F3 (−3 dB, no cabin gain)55 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 10 1/16″
Open sealed box in designer

Ported

Net volume1.59 ft³ (45 L)
Tuning (Fb)32 Hz
Portslot 1 15/16 × 14 5/16″, 41 15/16″ long
Port velocity at 1,000 W75 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 11 3/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs37.2 Hz
Qts0.50
Qes0.55
Qms5.11
Vas0.78 ft³
Re (one coil)1.8 Ω
Sd79.1 in²
Xmax0.55″
Vd43.6 in³ calc.
Mms304 g calc.
BL15.2 T·m calc.
EBP68 — sealed or ported calc.
Sensitivity, 1 W / 1 m85.2 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power1,000 W

Mounting dimensions

Ø12 11/16″cutout Ø11 1/8″mounting depth 6 3/4″magnet Ø≈ 7 1/4″
Cutout diameter11 1/8″
Mounting depth6 3/4″
Overall diameter12 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 Massive Audio 12″ models