RE Audio SRX12 D4

12″ subwoofer · dual 4 Ω · 300 W RMS

Fs 23.6 HzQts 0.38Vas 3.00 ft³Xmax 0.71″

Recommended box

For a sedan, one sub, 300 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 volume0.88 ft³ (25 L)
Qtc0.79
Fc50 Hz
F3 (−3 dB, no cabin gain)48 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 11 15/16″
Open sealed box in designer

Ported

Net volume2.79 ft³ (79 L)
Tuning (Fb)27 Hz
Portslot 1 9/16 × 14 5/16″, 25 3/4″ long
Port velocity at 300 W59 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 14 7/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs23.6 Hz
Qts0.38
Qes0.41
Qms4.99
Vas3.00 ft³
Re (one coil)3.6 Ω
Sd74.4 in²
Xmax0.71″
Vd52.7 in³ calc.
Mms175 g calc.
BL15.1 T·m calc.
EBP58 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.4 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power300 W

Mounting dimensions

Ø12 13/16″cutout Ø11″mounting depth 6 1/2″magnet Ø≈ 7 1/8″
Cutout diameter11″
Mounting depth6 1/2″
Overall diameter12 13/16″

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