Orion CO104D (Cobalt 10" DVC 4ohm, older Cobalt)

10″ subwoofer · dual 4 Ω · 400 W RMS

Fs 40.5 HzQts 0.62Vas 0.97 ft³Xmax 0.41″

Recommended box

For a sedan, one sub, 400 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 volume1.27 ft³ (36 L)
Qtc0.82
Fc54 Hz
F3 (−3 dB, no cabin gain)49 Hz
Example box (outside)12 3/16″ × 12 3/16″ × 21 1/4″
Open sealed box in designer

Ported

Net volume2.19 ft³ (62 L)
Tuning (Fb)35 Hz
Portslot 1 3/4 × 14 5/16″, 21 1/8″ long
Port velocity at 400 W65 ft/s
F3 (−3 dB, no cabin gain)30 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 12 1/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs40.5 Hz
Qts0.62
Qes0.67
Qms8.4
Vas0.97 ft³
Re (one coil)3.6 Ω
Sd56.3 in²
Xmax0.41″
Vd22.8 in³ calc.
Mms105 g calc.
BL12 T·m calc.
EBP60 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.4 dB calc.

General

Size10″
Voice coilsdual 4 Ω
RMS power400 W

Mounting dimensions

Ø10 1/4″cutout Ø9 1/8″mounting depth 5 1/4″magnet Ø≈ 5 15/16″
Cutout diameter9 1/8″
Mounting depth5 1/4″
Overall diameter10 1/4″

“≈” 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 10″ models