Focal SUB 10 (SVC 4 ohm)

10″ subwoofer · 4 Ω · 250 W RMS

Fs 21 HzQts 0.53Vas 1.59 ft³

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 volume1.09 ft³ (31 L)
Qtc0.82
Fc33 Hz
F3 (−3 dB, no cabin gain)30 Hz
Example box (outside)12 5/8″ × 12 5/8″ × 17 7/16″
Open sealed box in designer

Ported

Net volume1.87 ft³ (53 L)
Tuning (Fb)25 Hz
Portslot 1 9/16 × 14 5/16″, 47 5/8″ long
Port velocity at 250 W42 ft/s
F3 (−3 dB, no cabin gain)22 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 12 5/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs21 Hz
Qts0.53
Qes0.569
Qms6.88
Vas1.59 ft³
Re3.3 Ω
Sd48.7 in²
Xmax≈ 0.39″
Mms178 g calc.
BL11.7 T·m calc.
EBP37 — suits sealed calc.
Sensitivity, 1 W / 1 m80.7 dB calc.

General

Size10″
Voice coils4 Ω
RMS power250 W

Mounting dimensions

Ø10 11/16″cutout Ø9 5/16″mounting depth 4 3/8″magnet Ø≈ 6 1/16″
Cutout diameter9 5/16″
Mounting depth4 3/8″
Overall diameter10 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 Focal 10″ models