Massive Audio ECO12S4

12″ subwoofer · 4 Ω · 250 W RMS

Fs 37.5 HzQts 0.88Vas 2.37 ft³Xmax 0.28″

Recommended box

For a sedan, one sub, 250 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 volume1.80 ft³ (51 L)
Qtc1.34
Fc57 Hz
F3 (−3 dB, no cabin gain)42 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 1/16″
Open sealed box in designer

Ported

Net volume3.04 ft³ (86 L)
Tuning (Fb)43 Hz
Portslot 1 9/16 × 14 5/16″, 6 13/16″ long
Port velocity at 250 W60 ft/s
F3 (−3 dB, no cabin gain)36 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 14 1/2″
Open ported box in designer
2030405060801001502007278849096102HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs37.5 Hz
Qts0.88
Qes1.04
Qms5.79
Vas2.37 ft³
Re3.2 Ω
Sd78.4 in²
Xmax0.28″
Vd21.6 in³ calc.
Mms97 g calc.
BL8.4 T·m calc.
EBP36 — suits sealed calc.
Sensitivity, 1 W / 1 m87.3 dB calc.

General

Size12″
Voice coils4 Ω
RMS power250 W

Mounting dimensions

Ø12 1/16″cutout Ø10 7/8″mounting depth 5 9/16″magnet Ø≈ 7 1/16″
Cutout diameter10 7/8″
Mounting depth5 9/16″
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