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
37 Hz
Qts
0.50
Qes
0.54
Qms
7.61
Vas
0.92 ft³
Re
≈ 1.7 Ω
Sd
54.7 in²
Xmax
0.24″
Vd
12.9 in³ calc.
Mms
126 g calc.
BL
9.6 T·m calc.
EBP
69 — sealed or ported calc.
Sensitivity, 1 W / 1 m
85.9 dB calc.
General
Size
10″
Voice coils
2 Ω
RMS power
300 W
Mounting dimensions
Cutout diameter
9″
Mounting depth
3 3/8″
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.