Gladen M 12 (SVC 4 ohm)

12″ subwoofer · 4 Ω · 300 W RMS

29.2 HzFs, resonance
0.37Qts
3.96 ft³Vas
300 WRMS

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

smaller, tighter
1.09 ft³ (31 L)
Net volume
Qtc0.80
Fc63 Hz
F3 (−3 dB, no cabin gain)60 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 14 3/16″
Open sealed box in designer

Ported

deeper, louder
2.93 ft³ (83 L)
Net volume
Tuning (Fb)35 Hz
Portslot 1 3/4 × 14 5/16″, 14 3/4″ long
Port velocity at 300 W59 ft/s
F3 (−3 dB, no cabin gain)34 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 14 11/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs29.2 Hz
Qts0.37
Qes0.41
Qms4.32
Vas3.96 ft³
Re3.2 Ω
Sd76 in²
Xmax≈ 0.39″
Mms90 g calc.
BL11.4 T·m calc.
EBP71 — sealed or ported calc.
Sensitivity, 1 W / 1 m90.3 dB calc.

General

Size12″
Voice coils4 Ω
RMS power300 W

Mounting dimensions

Ø12 3/16″cutout Ø10 7/8″mounting depth 5 1/8″magnet Ø≈ 7 1/16″
Cutout diameter10 7/8″
Mounting depth5 1/8″
Overall diameter12 3/16″

“≈” 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