Cadence S1W15D2.v2

15″ subwoofer · dual 2 Ω · 500 W RMS

Fs 28.4 HzQts 0.40Vas 2.76 ft³Xmax 0.72″

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 volume1.13 ft³ (32 L)
Qtc0.74
Fc53 Hz
F3 (−3 dB, no cabin gain)53 Hz
Example box (outside)16 15/16″ × 16 15/16″ × 10 13/16″
Open sealed box in designer

Ported

Net volume3.00 ft³ (85 L)
Tuning (Fb)30 Hz
Portslot 1 15/16 × 16 5/16″, 27 1/16″ long
Port velocity at 500 W60 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 14 7/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs28.4 Hz
Qts0.40
Qes0.429
Qms6
Vas2.76 ft³
Re (one coil)≈ 1.7 Ω
Sd≈ 124 in²
Xmax0.72″
EBP66 — sealed or ported calc.
Sensitivity, 1 W / 1 m88.2 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power500 W

Mounting dimensions

Ø≈ 15 1/16″cutout Ø13 7/8″mounting depth 8 3/8″magnet Ø≈ 9″
Cutout diameter13 7/8″
Mounting depth8 3/8″

Only Qts is published — Qms assumed to be 6 and Qes calculated (barely affects box design).

“≈” 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 Cadence 15″ models