Phoenix Gold SL12D4 (slim, DVC 4 ohm)

12″ subwoofer · dual 4 Ω · 300 W RMS

Fs 32.9 HzQts 0.67Vas 1.88 ft³Xmax 0.49″

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 volume1.87 ft³ (53 L)
Qtc0.95
Fc47 Hz
F3 (−3 dB, no cabin gain)39 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 3/8″
Open sealed box in designer

Ported

Net volume3.18 ft³ (90 L)
Tuning (Fb)33 Hz
Portslot 1 3/4 × 14 5/16″, 15 7/16″ long
Port velocity at 300 W60 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 3/4″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32.9 Hz
Qts0.67
Qes0.79
Qms4.4
Vas1.88 ft³
Re (one coil)3.1 Ω
Sd82.2 in²
Xmax0.49″
Vd40.4 in³ calc.
Mms175 g calc.
BL11.9 T·m calc.
EBP42 — suits sealed calc.
Sensitivity, 1 W / 1 m85.8 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power300 W

Mounting dimensions

Ø≈ 12 3/16″cutout Ø11″mounting depth 4 1/16″magnet Ø≈ 7 3/16″
Cutout diameter11″
Mounting depth4 1/16″

“≈” 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 Phoenix Gold 12″ models