Phoenix Gold Z12D4 (Z series, DVC 4 ohm)

12″ subwoofer · dual 4 Ω · 400 W RMS

Fs 29.1 HzQts 0.56Vas 2.57 ft³Xmax 0.79″

Recommended box

For a sedan, one sub, 400 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 volume1.80 ft³ (51 L)
Qtc0.88
Fc45 Hz
F3 (−3 dB, no cabin gain)40 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 1/16″
Open sealed box in designer

Ported

Net volume3.07 ft³ (87 L)
Tuning (Fb)32 Hz
Portslot 1 3/4 × 14 5/16″, 17 7/16″ long
Port velocity at 400 W65 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 1/2″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs29.1 Hz
Qts0.56
Qes0.627
Qms5.48
Vas2.57 ft³
Re (one coil)3.6 Ω
Sd79.1 in²
Xmax0.79″
Vd62.2 in³ calc.
Mms151 g calc.
BL12.6 T·m calc.
EBP46 — suits sealed calc.
Sensitivity, 1 W / 1 m86.6 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power400 W

Mounting dimensions

Ø12 1/2″cutout Ø11 5/16″mounting depth 6 1/4″magnet Ø≈ 7 3/8″
Cutout diameter11 5/16″
Mounting depth6 1/4″
Overall diameter12 1/2″

“≈” 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