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
37.8 Hz
Qts
0.61
Qes
0.663
Qms
8.06
Vas
0.78 ft³
Re
2.05 Ω
Sd
56.8 in²
Xmax
0.51″
Vd
29.1 in³ calc.
Mms
154 g calc.
BL
10.6 T·m calc.
EBP
57 — sealed or ported calc.
Sensitivity, 1 W / 1 m
84.5 dB calc.
General
Size
10″
Voice coils
2 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.