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
23.5 Hz
Qts
0.51
Qes
0.562
Qms
5.06
Vas
1.76 ft³
Re
4.19 Ω
Sd
51.2 in²
Xmax
0.33″
Vd
17.1 in³ calc.
Mms
142 g calc.
BL
12.5 T·m calc.
EBP
42 — suits sealed calc.
Sensitivity, 1 W / 1 m
82.6 dB calc.
General
Size
10″
Voice coils
4 Ω
RMS power
200 W
Mounting dimensions
Cutout diameter
≈ 9 1/8″
Mounting depth
≈ 5 1/8″
“≈” 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.