Spyder Nitro 8 500W S4

8″ subwoofer · 4 Ω · 500 W RMS

Fs 38 HzQts 0.64Vas 0.42 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 volume0.78 ft³ (22 L)
Qtc0.80
Fc47 Hz
F3 (−3 dB, no cabin gain)44 Hz
Example box (outside)10 1/4″ × 10 1/4″ × 19 7/16″
Open sealed box in designer

Ported

Net volume1.31 ft³ (37 L)
Tuning (Fb)30 Hz
Port2 round ports Ø2 1/2″, 20 13/16″ long
Port velocity at 500 W143 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 7 7/16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs38 Hz
Qts0.64
Qes0.67
Qms16.9
Vas0.42 ft³
Re3.6 Ω
Sd≈ 33.3 in²
Xmax≈ 0.39″
EBP57 — sealed or ported calc.
Sensitivity, 1 W / 1 m81.9 dB calc.

General

Size8″
Voice coils4 Ω
RMS power500 W

Mounting dimensions

Ø8 1/16″cutout Ø7 1/8″mounting depth 4 3/16″magnet Ø≈ 4 5/8″
Cutout diameter7 1/8″
Mounting depth4 3/16″
Overall diameter8 1/16″

“≈” 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 Spyder 8″ models