Spyder Nitro 15 700W D4

15″ subwoofer · dual 4 Ω · 700 W RMS

Fs 25.6 HzQts 0.53Vas 7.13 ft³

Recommended box

For a sedan, one sub, 700 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 volume2.83 ft³ (80 L)
Qtc1.00
Fc48 Hz
F3 (−3 dB, no cabin gain)40 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 12″
Open sealed box in designer

Ported

Net volume4.80 ft³ (136 L)
Tuning (Fb)35 Hz
Portslot 2 9/16 × 16 5/16″, 13 5/8″ long
Port velocity at 700 W64 ft/s
F3 (−3 dB, no cabin gain)32 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 20 3/8″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs25.6 Hz
Qts0.53
Qes0.59
Qms5.55
Vas7.13 ft³
Re (one coil)3.4 Ω
Sd≈ 124 in²
Xmax≈ 0.39″
EBP43 — suits sealed calc.
Sensitivity, 1 W / 1 m89.6 dB calc.

General

Size15″
Voice coilsdual 4 Ω
RMS power700 W

Mounting dimensions

Ø15 1/4″cutout Ø13 3/4″mounting depth 7 7/16″magnet Ø≈ 8 15/16″
Cutout diameter13 3/4″
Mounting depth7 7/16″
Overall diameter15 1/4″

“≈” 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 Spyder 15″ models