Massive Audio TKO124

12″ subwoofer · dual 4 Ω · 300 W RMS

Fs 36.1 HzQts 0.53Vas 2.20 ft³Xmax 0.28″

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)
Qtc0.80
Fc55 Hz
F3 (−3 dB, no cabin gain)52 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 8 1/2″
Open sealed box in designer

Ported

Net volume3.04 ft³ (86 L)
Tuning (Fb)36 Hz
Portslot 1 3/4 × 14 5/16″, 13 1/16″ long
Port velocity at 300 W62 ft/s
F3 (−3 dB, no cabin gain)33 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs36.1 Hz
Qts0.53
Qes0.59
Qms4.8
Vas2.20 ft³
Re (one coil)3.2 Ω
Sd78.4 in²
Xmax0.28″
Vd21.6 in³ calc.
Mms113 g calc.
BL11.8 T·m calc.
EBP61 — sealed or ported calc.
Sensitivity, 1 W / 1 m89 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power300 W

Mounting dimensions

Ø12 1/16″cutout Ø10 7/8″mounting depth 5 13/16″magnet Ø≈ 7 1/16″
Cutout diameter10 7/8″
Mounting depth5 13/16″
Overall diameter12 1/16″

“≈” 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