For a sedan, one sub, 1,000 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
37.7 Hz
Qts
0.81
Qes
0.905
Qms
7.29
Vas
0.79 ft³
Re (one coil)
≈ 0.85 Ω
Sd
70.8 in²
Xmax
0.91″
Vd
64.1 in³ calc.
Mms
235 g calc.
BL
7.2 T·m calc.
EBP
42 — suits sealed calc.
Sensitivity, 1 W / 1 m
83.2 dB calc.
General
Size
12″
Voice coils
dual 1 Ω
RMS power
1,000 W
Mounting dimensions
Cutout diameter
11″
Mounting depth
6 3/4″
Overall diameter
12 1/2″
“≈” 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.