Gladen Zero 12 Pro (SVC 4 ohm)

12″ subwoofer · 4 Ω · 500 W RMS

Fs 27 HzQts 0.38Vas 3.31 ft³Xmax 0.49″

Recommended box

For a sedan, one sub, 500 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 volume0.95 ft³ (27 L)
Qtc0.80
Fc57 Hz
F3 (−3 dB, no cabin gain)55 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 12 11/16″
Open sealed box in designer

Ported

Net volume3.00 ft³ (85 L)
Tuning (Fb)30 Hz
Portslot 2 3/16 × 14 5/16″, 26 1/8″ long
Port velocity at 500 W61 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 16 1/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs27 Hz
Qts0.38
Qes0.4
Qms6.32
Vas3.31 ft³
Re3.7 Ω
Sd79.1 in²
Xmax0.49″
Vd38.9 in³ calc.
Mms137 g calc.
BL14.6 T·m calc.
EBP68 — sealed or ported calc.
Sensitivity, 1 W / 1 m88.6 dB calc.

General

Size12″
Voice coils4 Ω
RMS power500 W

Mounting dimensions

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

“≈” 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 Gladen 12″ models