Gladen RS-X 12 Slim (SVC 4 ohm)

12″ subwoofer · 4 Ω

Fs 35 HzQts 0.57Vas 2.53 ft³Xmax 0.28″

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 volume1.73 ft³ (49 L)
Qtc0.89
Fc55 Hz
F3 (−3 dB, no cabin gain)48 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 8 3/4″
Open sealed box in designer

Ported

Net volume2.93 ft³ (83 L)
Tuning (Fb)38 Hz
Portslot 1 3/4 × 14 5/16″, 11 7/8″ long
Port velocity at 300 W61 ft/s
F3 (−3 dB, no cabin gain)34 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 14 1/2″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35 Hz
Qts0.57
Qes0.62
Qms7.02
Vas2.53 ft³
Re2.88 Ω
Sd76.1 in²
Xmax0.28″
Vd21 in³ calc.
Mms99 g calc.
BL10 T·m calc.
EBP56 — sealed or ported calc.
Sensitivity, 1 W / 1 m89 dB calc.

General

Size12″
Voice coils4 Ω
RMS power—

Mounting dimensions

Ø12 3/8″cutout Ø10 9/16″mounting depth 4 3/4″magnet Ø≈ 6 7/8″
Cutout diameter10 9/16″
Mounting depth4 3/4″
Overall diameter12 3/8″

“≈” 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