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
30.2 Hz
Qts
0.48
Qes
0.61
Qms
2.17
Vas
0.89 ft³
Re
4.06 Ω
Sd
53.7 in²
Xmax
0.47″
Vd
25.4 in³ calc.
Mms
187 g calc.
BL
15.4 T·m calc.
EBP
49 — suits sealed calc.
Sensitivity, 1 W / 1 m
82.6 dB calc.
General
Size
10″
Voice coils
4 Ω
RMS power
450 W
Mounting dimensions
Cutout diameter
9 7/16″
Mounting depth
6 7/8″
Overall diameter
11″
“≈” 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.