For a sedan, one sub, 375 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
38.6 Hz
Qts
0.69
Qes
0.757
Qms
7.69
Vas
0.79 ft³
Re
3.68 Ω
Sd
56.8 in²
Xmax
0.51″
Vd
29.1 in³ calc.
Mms
144 g calc.
BL
13 T·m calc.
EBP
51 — sealed or ported calc.
Sensitivity, 1 W / 1 m
84.3 dB calc.
General
Size
10″
Voice coils
4 Ω
RMS power
375 W
Mounting dimensions
Cutout diameter
9 3/16″
Mounting depth
4 1/4″
Overall diameter
10 5/8″
Magnet diameter
5 9/16″
“≈” 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.