For a sedan, one sub, 700 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
41 Hz
Qts
0.50
Qes
0.536
Qms
8.66
Vas
0.51 ft³
Re (one coil)
3.29 Ω
Sd
53.7 in²
Xmax
0.80″
Vd
42.7 in³ calc.
Mms
178 g calc.
BL
16.8 T·m calc.
EBP
76 — sealed or ported calc.
Sensitivity, 1 W / 1 m
84.7 dB calc.
General
Size
10″
Voice coils
dual 4 Ω
RMS power
700 W
Mounting dimensions
Cutout diameter
9 3/16″
Mounting depth
6 3/8″
Overall diameter
10 11/16″
Magnet diameter
7 1/4″
“≈” 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.