Gladen RS 12 (SVC 4 ohm)

12″ subwoofer · 4 Ω · 400 W RMS

Fs 26.3 HzQts 0.40Vas 3.73 ft³

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 volume1.24 ft³ (35 L)
Qtc0.80
Fc53 Hz
F3 (−3 dB, no cabin gain)50 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 15 11/16″
Open sealed box in designer

Ported

Net volume2.93 ft³ (83 L)
Tuning (Fb)32 Hz
Portslot 1 3/4 × 14 5/16″, 18 7/16″ long
Port velocity at 400 W65 ft/s
F3 (−3 dB, no cabin gain)31 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs26.3 Hz
Qts0.40
Qes0.43
Qms6.03
Vas3.73 ft³
Re3.2 Ω
Sd76 in²
Xmax≈ 0.39″
Mms118 g calc.
BL12 T·m calc.
EBP61 — sealed or ported calc.
Sensitivity, 1 W / 1 m88.5 dB calc.

General

Size12″
Voice coils4 Ω
RMS power400 W

Mounting dimensions

Ø12 1/2″cutout Ø11 1/8″mounting depth 6″magnet Ø5 7/8″
Cutout diameter11 1/8″
Mounting depth6″
Overall diameter12 1/2″
Magnet diameter5 7/8″

“≈” 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