DL Audio Phoenix Sport 15 (1+1)

15″ subwoofer · dual 1 Ω · 2,500 W RMS

Fs 24.5 HzQts 0.39Vas 2.58 ft³

Recommended box

For a sedan, one sub, 2,500 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 volume1.27 ft³ (36 L)
Qtc0.68
Fc43 Hz
F3 (−3 dB, no cabin gain)47 Hz
Example box (outside)16 15/16″ × 16 15/16″ × 11 13/16″
Open sealed box in designer

Ported

Net volume2.58 ft³ (73 L)
Tuning (Fb)27 Hz
Portslot 2 3/8 × 16 5/16″, 49 5/8″ long
Port velocity at 2,500 W97 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs24.5 Hz
Qts0.39
Qes0.415
Qms6
Vas2.58 ft³
Re (one coil)≈ 0.85 Ω
Sd≈ 124 in²
Xmax≈ 0.39″
EBP59 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.1 dB calc.

General

Size15″
Voice coilsdual 1 Ω
RMS power2,500 W

Mounting dimensions

Ø15 5/8″cutout Ø13 3/4″mounting depth 9 7/16″magnet Ø≈ 8 15/16″
Cutout diameter13 3/4″
Mounting depth9 7/16″
Overall diameter15 5/8″

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 DL Audio 15″ models