ARC Audio Flatline FL12D4

12″ subwoofer · dual 4 Ω · 1,000 W RMS

Fs 23.7 HzQts 0.33Vas 2.75 ft³Xmax 0.79″

Recommended box

For a sedan, one sub, 1,000 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 volume0.79 ft³ (22.5 L)
Qtc0.69
Fc50 Hz
F3 (−3 dB, no cabin gain)55 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 11″
Open sealed box in designer

Ported

Net volume1.66 ft³ (47 L)
Tuning (Fb)30 Hz
Portslot 1 15/16 × 14 5/16″, 46 1/16″ long
Port velocity at 1,000 W66 ft/s
F3 (−3 dB, no cabin gain)30 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 12 7/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs23.7 Hz
Qts0.33
Qes0.369
Qms2.8
Vas2.75 ft³
Re (one coil)3.55 Ω
Sd84.5 in²
Xmax0.79″
Vd66.5 in³ calc.
Mms244 g calc.
BL18.7 T·m calc.
EBP64 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.5 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power1,000 W

Mounting dimensions

Ø≈ 12 3/16″cutout Ø11″mounting depth 8 1/2″magnet Ø≈ 7 1/8″
Cutout diameter11″
Mounting depth8 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