Focal Performance Sub P 25 DB (DVC 4+4 ohm)

10″ subwoofer · dual 4 Ω · 250 W RMS

Fs 27.5 HzQts 0.43Vas 1.44 ft³Xmax 0.33″

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 volume0.60 ft³ (17 L)
Qtc0.79
Fc51 Hz
F3 (−3 dB, no cabin gain)48 Hz
Example box (outside)12 3/16″ × 12 3/16″ × 11 1/4″
Open sealed box in designer

Ported

Net volume1.94 ft³ (55 L)
Tuning (Fb)28 Hz
Portslot 1 9/16 × 14 5/16″, 35 11/16″ long
Port velocity at 250 W48 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 12 1/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs27.5 Hz
Qts0.43
Qes0.47
Qms5.21
Vas1.44 ft³
Re (one coil)3.4 Ω
Sd53.7 in²
Xmax0.33″
Vd18 in³ calc.
Mms140 g calc.
BL13.2 T·m calc.
EBP58 — sealed or ported calc.
Sensitivity, 1 W / 1 m84.5 dB calc.

General

Size10″
Voice coilsdual 4 Ω
RMS power250 W

Mounting dimensions

Ø10 1/4″cutout ≈ Ø9 3/16″mounting depth 5 1/2″magnet Ø≈ 6″
Cutout diameter≈ 9 3/16″
Mounting depth5 1/2″
Overall diameter10 1/4″

Judging by its value, the published Re is for both coils in parallel — converted to per coil.

“≈” 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 10″ models