For a sedan, one sub, 600 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
29.1 Hz
Qts
0.72
Qes
0.9
Qms
3.6
Vas
0.88 ft³
Re (one coil)
3.2 Ω
Sd
53.7 in²
Xmax
0.31″
Vd
16.9 in³ calc.
Mms
203 g calc.
BL
11.5 T·m calc.
EBP
32 — suits sealed calc.
Sensitivity, 1 W / 1 m
80.4 dB calc.
General
Size
10″
Voice coils
dual 4 Ω
RMS power
600 W
Mounting dimensions
Cutout diameter
9 1/8″
Mounting depth
3 1/8″
Overall diameter
10 3/8″
“≈” 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.