ARC Audio Black 12D4 V2

12″ subwoofer · dual 4 Ω · 500 W RMS

Fs 24.1 HzQts 0.42Vas 3.11 ft³Xmax 0.63″

Recommended box

For a sedan, one sub, 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 volume1.17 ft³ (33 L)
Qtc0.80
Fc46 Hz
F3 (−3 dB, no cabin gain)44 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 14 1/8″
Open sealed box in designer

Ported

Net volume2.93 ft³ (83 L)
Tuning (Fb)28 Hz
Portslot 1 15/16 × 14 5/16″, 28 7/16″ long
Port velocity at 500 W63 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs24.1 Hz
Qts0.42
Qes0.46
Qms4.46
Vas3.11 ft³
Re (one coil)3.95 Ω
Sd76.1 in²
Xmax0.63″
Vd47.9 in³ calc.
Mms169 g calc.
BL14.8 T·m calc.
EBP52 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.3 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power500 W

Mounting dimensions

Ø12 1/2″cutout Ø11 1/4″mounting depth 6 3/4″magnet Ø≈ 7 5/16″
Cutout diameter11 1/4″
Mounting depth6 3/4″
Overall diameter12 1/2″

Judging by its value, the published Re is for both coils in series — converted to per coil.

“≈” 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 ARC Audio 12″ models