Gladen RS 15 FA Free-Air (SVC 4 ohm)

15″ subwoofer · 4 Ω · 450 W RMS

Fs 27.6 HzQts 0.54Vas 4.76 ft³

Recommended box

For a sedan, one sub, 450 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 volume2.93 ft³ (83 L)
Qtc0.88
Fc45 Hz
F3 (−3 dB, no cabin gain)40 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 12 3/8″
Open sealed box in designer

Ported

Net volume4.98 ft³ (141 L)
Tuning (Fb)32 Hz
Portslot 2 3/16 × 16 5/16″, 13 5/8″ long
Port velocity at 450 W63 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 20 13/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs27.6 Hz
Qts0.54
Qes0.6
Qms5.92
Vas4.76 ft³
Re4 Ω
Sd128.7 in²
Xmax≈ 0.39″
Mms241 g calc.
BL16.7 T·m calc.
EBP46 — suits sealed calc.
Sensitivity, 1 W / 1 m88.7 dB calc.

General

Size15″
Voice coils4 Ω
RMS power450 W

Mounting dimensions

Ø15 7/16″cutout Ø13 15/16″mounting depth 6 15/16″magnet Ø≈ 9 1/16″
Cutout diameter13 15/16″
Mounting depth6 15/16″
Overall diameter15 7/16″

“≈” 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 15″ models