Gladen RS-X 6.5 (SVC 4 ohm)

6.5″ subwoofer · 4 Ω · 250 W RMS

Fs 54.9 HzQts 0.62Vas 0.14 ft³

Recommended box

For a sedan, one sub, 250 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 volume0.21 ft³ (6 L)
Qtc0.80
Fc70 Hz
F3 (−3 dB, no cabin gain)66 Hz
Example box (outside)9 1/16″ × 9 1/16″ × 8 3/16″
Open sealed box in designer

Ported

Net volume0.53 ft³ (15 L)
Tuning (Fb)46 Hz
Portround port Ø2 1/2″, 10 1/16″ long
Port velocity at 250 W157 ft/s
F3 (−3 dB, no cabin gain)39 Hz
Example box (outside)15 3/4″ × 15 3/4″ × 6 5/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs54.9 Hz
Qts0.62
Qes0.7
Qms5.59
Vas0.14 ft³
Re3.3 Ω
Sd22.2 in²
Xmax≈ 0.39″
Mms63 g calc.
BL10.1 T·m calc.
EBP78 — sealed or ported calc.
Sensitivity, 1 W / 1 m81.6 dB calc.

General

Size6.5″
Voice coils4 Ω
RMS power250 W

Mounting dimensions

Ø7 1/16″cutout Ø6″mounting depth 3 7/8″magnet Ø4 3/4″
Cutout diameter6″
Mounting depth3 7/8″
Overall diameter7 1/16″
Magnet diameter4 3/4″

“≈” 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 6.5″ models