Spyder Nitro 12 350W S4

12″ subwoofer · 4 Ω · 350 W RMS

Fs 38 HzQts 0.82Vas 1.06 ft³

Recommended box

For a sedan, one sub, 350 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)
Qtc1.04
Fc48 Hz
F3 (−3 dB, no cabin gain)39 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)33 Hz
Portslot 1 15/16 × 14 5/16″, 19 1/4″ long
Port velocity at 350 W63 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 3/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs38 Hz
Qts0.82
Qes0.88
Qms11.3
Vas1.06 ft³
Re3.6 Ω
Sd≈ 76 in²
Xmax≈ 0.39″
EBP43 — suits sealed calc.
Sensitivity, 1 W / 1 m84.7 dB calc.

General

Size12″
Voice coils4 Ω
RMS power350 W

Mounting dimensions

Ø11 15/16″cutout Ø10 11/16″mounting depth 5 5/16″magnet Ø5 9/16″
Cutout diameter10 11/16″
Mounting depth5 5/16″
Overall diameter11 15/16″
Magnet diameter5 9/16″

“≈” 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 12″ models