Fi Audio Alpha v1 10 S4

10″ subwoofer · 4 Ω · 1,000 W RMS

Fs 56.1 HzQts 0.39Vas 0.20 ft³Xmax 0.67″

Recommended box

For a sedan, one sub, 1,000 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 volume0.42 ft³ (12 L)
Qtc0.47
Fc68 Hz
F3 (−3 dB, no cabin gain)116 Hz
Example box (outside)12 3/16″ × 12 3/16″ × 8 5/8″
Open sealed box in designer

Ported

Net volume0.92 ft³ (26 L)
Tuning (Fb)34 Hz
Portround port Ø3″, 15 1/2″ long
Port velocity at 1,000 W268 ft/s
F3 (−3 dB, no cabin gain)96 Hz
Example box (outside)22 3/16″ × 15 3/4″ × 7 11/16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs56.1 Hz
Qts0.39
Qes0.41
Qms8.04
Vas0.20 ft³
Re3.3 Ω
Sd48 in²
Xmax0.67″
Vd32.1 in³ calc.
Mms190 g calc.
BL23.2 T·m calc.
EBP137 — suits ported calc.
Sensitivity, 1 W / 1 m85.9 dB calc.

General

Size10″
Voice coils4 Ω
RMS power1,000 W

Mounting dimensions

Ø≈ 10 5/16″cutout ≈ Ø9 1/8″mounting depth ≈ 5 1/8″magnet Ø≈ 5 15/16″
Cutout diameter≈ 9 1/8″
Mounting depth≈ 5 1/8″

Cone area (Sd) calculated from Fs, Vas and Mms: 48 in².

“≈” 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 Fi Audio 10″ models