DL Audio Phoenix Bass Machine 12 (2+2)

12″ subwoofer · dual 2 Ω · 1,700 W RMS

Fs 27.3 HzQts 0.55Vas 0.86 ft³

Recommended box

For a sedan, one sub, 1,700 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 volume0.78 ft³ (22 L)
Qtc0.80
Fc40 Hz
F3 (−3 dB, no cabin gain)37 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 10 1/4″
Open sealed box in designer

Ported

Net volume2.33 ft³ (66 L)
Tuning (Fb)25 Hz
Portslot 2 3/16 × 14 5/16″, 52 5/16″ long
Port velocity at 1,700 W100 ft/s
F3 (−3 dB, no cabin gain)22 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs27.3 Hz
Qts0.55
Qes0.606
Qms6
Vas0.86 ft³
Re (one coil)≈ 1.7 Ω
Sd≈ 76 in²
Xmax≈ 0.39″
EBP45 — suits sealed calc.
Sensitivity, 1 W / 1 m81.1 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power1,700 W

Mounting dimensions

Ø12 15/16″cutout Ø11 1/4″mounting depth 7 3/4″magnet Ø≈ 7 5/16″
Cutout diameter11 1/4″
Mounting depth7 3/4″
Overall diameter12 15/16″

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 12″ models