Orion HCCA154 (HCCA 15" DVC 4ohm)

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

Fs 30 HzQts 0.54Vas 2.82 ft³Xmax 1.19″
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 volume2.30 ft³ (65 L)
Qtc0.80
Fc45 Hz
F3 (−3 dB, no cabin gain)42 Hz
Example box (outside)18 1/8″ × 18 1/8″ × 16 3/4″
Open sealed box in designer

Ported

Net volume5.79 ft³ (164 L)
Tuning (Fb)27 Hz
Portslot 5 1/8 × 17 1/2″, 48 13/16″ long
Port velocity at 2,500 W64 ft/s
F3 (−3 dB, no cabin gain)24 Hz
Example box (outside)31 1/2″ × 18 7/8″ × 30 3/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30 Hz
Qts0.54
Qes0.61
Qms4.38
Vas2.82 ft³
Re (one coil)3.65 Ω
Sd149.1 in²
Xmax1.19″
Vd177.3 in³ calc.
Mms461 g calc.
BL22.8 T·m calc.
EBP49 — suits sealed calc.
Sensitivity, 1 W / 1 m87.5 dB calc.

General

Size15″
Voice coilsdual 4 Ω
RMS power2,500 W

Mounting dimensions

Ø≈ 16 1/4″cutout Ø15 1/16″mounting depth 11 9/16″magnet Ø≈ 9 13/16″
Cutout diameter15 1/16″
Mounting depth11 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 Orion 15″ models