Gladen RS-X 12 (SVC 4 ohm)

12″ subwoofer · 4 Ω · 500 W RMS

Fs 31.4 HzQts 0.45Vas 2.24 ft³

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 volume1.02 ft³ (29 L)
Qtc0.80
Fc56 Hz
F3 (−3 dB, no cabin gain)54 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 13 7/16″
Open sealed box in designer

Ported

Net volume3.07 ft³ (87 L)
Tuning (Fb)31 Hz
Portslot 2 3/16 × 14 5/16″, 23 1/2″ long
Port velocity at 500 W64 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

Fs31.4 Hz
Qts0.45
Qes0.49
Qms4.92
Vas2.24 ft³
Re3.71 Ω
Sd79.7 in²
Xmax≈ 0.39″
Mms151 g calc.
BL15 T·m calc.
EBP64 — sealed or ported calc.
Sensitivity, 1 W / 1 m88 dB calc.

General

Size12″
Voice coils4 Ω
RMS power500 W

Mounting dimensions

Ø12 1/2″cutout Ø11 3/16″mounting depth 5 13/16″magnet Ø7 5/16″
Cutout diameter11 3/16″
Mounting depth5 13/16″
Overall diameter12 1/2″
Magnet diameter7 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