Hifonics CX15D2

15″ subwoofer · dual 2 Ω · 4,500 W RMS

Fs 34 HzQts 0.39Vas 2.08 ft³Xmax 0.69″

Recommended box

For a sedan, one sub, 4,500 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

Net volume1.48 ft³ (42 L)
Qtc0.60
Fc53 Hz
F3 (−3 dB, no cabin gain)66 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 12 3/4″
Open sealed box in designer

Ported

Net volume2.51 ft³ (71 L)
Tuning (Fb)34 Hz
Portslot 3 3/4 × 16 11/16″, 51 1/16″ long
Port velocity at 4,500 W92 ft/s
F3 (−3 dB, no cabin gain)32 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 17 7/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs34 Hz
Qts0.39
Qes0.42
Qms5.35
Vas2.08 ft³
Re (one coil)2 Ω
Sd130.8 in²
Xmax0.69″
Vd90.1 in³ calc.
Mms375 g calc.
BL19.5 T·m calc.
EBP81 — sealed or ported calc.
Sensitivity, 1 W / 1 m89.4 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power4,500 W

Mounting dimensions

Ø15 9/16″cutout Ø14 1/8″mounting depth 10 1/4″magnet Ø≈ 9 3/16″
Cutout diameter14 1/8″
Mounting depth10 1/4″
Overall diameter15 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.

Data sources

Other Hifonics 15″ models