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
40.9 Hz
Qts
0.61
Qes
0.67
Qms
7
Vas
1.76 ft³
Re (one coil)
≈ 1.7 Ω
Sd
≈ 124 in²
Xmax
0.79″
EBP
61 — sealed or ported calc.
Sensitivity, 1 W / 1 m
89.1 dB calc.
General
Size
15″
Voice coils
dual 2 Ω
RMS power
2,000 W
Mounting dimensions
Cutout diameter
14 1/4″
Mounting depth
8 9/16″
“≈” 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.