For a sedan, one sub, 2,000 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
43.1 Hz
Qts
0.39
Qes
0.428
Qms
4.44
Vas
1.07 ft³
Re (one coil)
1.8 Ω
Sd
124.6 in²
Xmax
0.69″
Vd
85.9 in³ calc.
Mms
414 g calc.
BL
21.7 T·m calc.
EBP
101 — suits ported calc.
Sensitivity, 1 W / 1 m
89.5 dB calc.
General
Size
15″
Voice coils
dual 2 Ω
RMS power
2,000 W
Mounting dimensions
Cutout diameter
13 7/8″
Mounting depth
8 7/8″
Overall diameter
15 7/16″
“≈” 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.