For a sedan, one sub, 450 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
30.5 Hz
Qts
0.37
Qes
0.408
Qms
4
Vas
0.96 ft³
Re
2 Ω
Sd
51.2 in²
Xmax
0.41″
Vd
20.7 in³ calc.
Mms
155 g calc.
BL
12.1 T·m calc.
EBP
75 — sealed or ported calc.
Sensitivity, 1 W / 1 m
84.8 dB calc.
General
Size
10″
Voice coils
2 Ω
RMS power
450 W
Mounting dimensions
Cutout diameter
9 1/8″
Mounting depth
6 13/16″
Overall diameter
10 5/8″
“≈” 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.