For a sedan, one sub, 350 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 Ported · SPL in dB at 1 W / 1 m, no cabin gain
Thiele/Small parameters
Fs
39.2 Hz
Qts
0.57
Qes
0.61
Qms
9.02
Vas
0.87 ft³
Re
2.22 Ω
Sd
56.8 in²
Xmax
0.51″
Vd
29.1 in³ calc.
Mms
128 g calc.
BL
10.7 T·m calc.
EBP
64 — sealed or ported calc.
Sensitivity, 1 W / 1 m
85.8 dB calc.
General
Size
10″
Voice coils
2 Ω
RMS power
350 W
Mounting dimensions
Cutout diameter
9 3/16″
Mounting depth
4 1/4″
Overall diameter
10 11/16″
Magnet diameter
5 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.