For a sedan, one sub, 300 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
32 Hz
Qts
0.41
Qes
0.45
Qms
5.09
Vas
0.88 ft³
Re
2 Ω
Sd
51.6 in²
Xmax
0.31″
Vd
16.3 in³ calc.
Mms
155 g calc.
BL
11.8 T·m calc.
EBP
71 — sealed or ported calc.
Sensitivity, 1 W / 1 m
84.6 dB calc.
General
Size
10″
Voice coils
2 Ω
RMS power
300 W
Mounting dimensions
Cutout diameter
9 1/8″
Mounting depth
4 15/16″
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.