For a sedan, one sub, 200 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
31.3 Hz
Qts
0.37
Qes
0.4
Qms
5.51
Vas
2.25 ft³
Re
3.2 Ω
Sd
56.7 in²
Xmax
≈ 0.39″
Mms
77 g calc.
BL
11 T·m calc.
EBP
78 — sealed or ported calc.
Sensitivity, 1 W / 1 m
88.9 dB calc.
General
Size
10″
Voice coils
4 Ω
RMS power
200 W
Mounting dimensions
Cutout diameter
9 5/16″
Mounting depth
4 7/16″
Overall diameter
10 5/16″
“≈” 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.