Audio System H15 EVO

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

Fs 34 HzQts 0.62Vas 1.83 ft³Xmax 0.87″
The published specs don’t add up:

Recommended box

For a sedan, one sub, 2,500 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 volume2.72 ft³ (77 L)
Qtc0.80
Fc44 Hz
F3 (−3 dB, no cabin gain)41 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 21 3/16″
Open sealed box in designer

Ported

Net volume5.01 ft³ (142 L)
Tuning (Fb)28 Hz
Portslot 5 5/16 × 16 11/16″, 52 9/16″ long
Port velocity at 2,500 W65 ft/s
F3 (−3 dB, no cabin gain)24 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 29 3/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs34 Hz
Qts0.62
Qes0.699
Qms5.38
Vas1.83 ft³
Re (one coil)1.9 Ω
Sd129.4 in²
Xmax0.87″
Vd112.1 in³ calc.
Mms417 g calc.
BL15.6 T·m calc.
EBP49 — suits sealed calc.
Sensitivity, 1 W / 1 m86.7 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power2,500 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 Audio System 15″ models