RE Audio SCX12 D4 v2

12″ subwoofer · dual 4 Ω · 450 W RMS

Fs 24.6 HzQts 0.55Vas 1.86 ft³

Recommended box

For a sedan, one sub, 450 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 volume1.66 ft³ (47 L)
Qtc0.80
Fc36 Hz
F3 (−3 dB, no cabin gain)34 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 20 3/16″
Open sealed box in designer

Ported

Net volume2.93 ft³ (83 L)
Tuning (Fb)25 Hz
Portslot 1 3/4 × 14 5/16″, 32 7/8″ long
Port velocity at 450 W64 ft/s
F3 (−3 dB, no cabin gain)22 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 16 3/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs24.6 Hz
Qts0.55
Qes0.611
Qms5.49
Vas1.86 ft³
Re (one coil)3.54 Ω
Sd76.1 in²
Xmax≈ 0.39″
Mms271 g calc.
BL15.6 T·m calc.
EBP40 — suits sealed calc.
Sensitivity, 1 W / 1 m83.1 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power450 W

Mounting dimensions

Ø12 1/2″cutout Ø11 3/16″mounting depth 6 1/8″magnet Ø≈ 7 1/4″
Cutout diameter11 3/16″
Mounting depth6 1/8″
Overall diameter12 1/2″

Judging by its value, the published Re is for both coils in parallel — 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 RE Audio 12″ models