For a sedan, one sub, 800 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
37.8 Hz
Qts
0.48
Qes
0.506
Qms
10.65
Vas
0.54 ft³
Re (one coil)
3.61 Ω
Sd
53.7 in²
Xmax
0.78″
Vd
41.6 in³ calc.
Mms
198 g calc.
BL
18.3 T·m calc.
EBP
75 — sealed or ported calc.
Sensitivity, 1 W / 1 m
84.1 dB calc.
General
Size
10″
Voice coils
dual 4 Ω
RMS power
800 W
Mounting dimensions
Cutout diameter
9 3/16″
Mounting depth
6 3/8″
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.