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
26.5 Hz
Qts
0.78
Qes
0.86
Qms
8.8
Vas
1.03 ft³
Re (one coil)
1.9 Ω
Sd
48.4 in²
Xmax
0.45″
Vd
21.9 in³ calc.
Mms
170 g calc.
BL
7.9 T·m calc.
EBP
31 — suits sealed calc.
Sensitivity, 1 W / 1 m
80 dB calc.
General
Size
10″
Voice coils
dual 2 Ω
RMS power
300 W
Mounting dimensions
Cutout diameter
9 1/8″
Mounting depth
5 13/16″
Overall diameter
10 9/16″
Magnet diameter
5 11/16″
“≈” 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.