Hifonics ZXT15D2

15″ subwoofer · dual 2 Ω · 3,500 W RMS

Fs 35 HzQts 0.61Vas 1.59 ft³Xmax 0.91″

Recommended box

For a sedan, one sub, 3,500 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 volume2.15 ft³ (61 L)
Qtc0.80
Fc46 Hz
F3 (−3 dB, no cabin gain)43 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 17 5/16″
Open sealed box in designer

Ported

Net volume4.70 ft³ (133 L)
Tuning (Fb)28 Hz
Portslot 5 7/8 × 16 11/16″, 63 3/8″ long
Port velocity at 3,500 W66 ft/s
F3 (−3 dB, no cabin gain)24 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 31 5/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35 Hz
Qts0.61
Qes0.73
Qms3.57
Vas1.59 ft³
Re (one coil)2 Ω
Sd120.9 in²
Xmax0.91″
Vd109.5 in³ calc.
Mms396 g calc.
BL15.4 T·m calc.
EBP48 — suits sealed calc.
Sensitivity, 1 W / 1 m86.2 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power3,500 W

Mounting dimensions

Ø15 7/16″cutout Ø14 1/8″mounting depth 9 7/8″magnet Ø≈ 9 3/16″
Cutout diameter14 1/8″
Mounting depth9 7/8″
Overall diameter15 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.

Data sources

Other Hifonics 15″ models