Focal Flax Evo P 30 FSE (shallow, SVC 4 ohm)

12″ subwoofer · 4 Ω · 300 W RMS

Fs 30 HzQts 1.10Vas 1.48 ft³Xmax 0.43″

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 volume1.80 ft³ (51 L)
Qtc1.49
Fc41 Hz
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 1/16″
Open sealed box in designer

Ported

Net volume3.07 ft³ (87 L)
Tuning (Fb)32 Hz
Portslot 1 9/16 × 14 5/16″, 15 1/4″ long
Port velocity at 300 W59 ft/s
F3 (−3 dB, no cabin gain)25 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 3/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30 Hz
Qts1.10
Qes1.3
Qms7.2
Vas1.48 ft³
Re3.2 Ω
Sd79.1 in²
Xmax0.43″
Vd34.2 in³ calc.
Mms247 g calc.
BL10.7 T·m calc.
EBP23 — suits sealed calc.
Sensitivity, 1 W / 1 m81.4 dB calc.

General

Size12″
Voice coils4 Ω
RMS power300 W

Mounting dimensions

Ø12 3/8″cutout Ø10 7/8″mounting depth 4 5/16″magnet Ø≈ 7 1/16″
Cutout diameter10 7/8″
Mounting depth4 5/16″
Overall diameter12 3/8″

“≈” 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 Focal 12″ models