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
29.6 Hz
Qts
0.34
Qes
0.366
Qms
4.05
Vas
1.94 ft³
Re (one coil)
≈ 0.85 Ω
Sd
127.7 in²
Xmax
0.83″
Vd
105.6 in³ calc.
Mms
505 g calc.
BL
14.8 T·m calc.
EBP
81 — sealed or ported calc.
Sensitivity, 1 W / 1 m
87.9 dB calc.
General
Size
15″
Voice coils
dual 1 Ω
RMS power
2,000 W
Mounting dimensions
Cutout diameter
13 7/8″
Mounting depth
9 3/8″
“≈” 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.