DL Audio Piranha 12

12″ subwoofer · dual 2 Ω · 250 W RMS

Fs 37.1 HzQts 0.72Vas 1.31 ft³

Recommended box

For a sedan, one sub, 250 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)
Qtc0.95
Fc49 Hz
F3 (−3 dB, no cabin gain)41 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 9/16 × 14 5/16″, 15″ long
Port velocity at 250 W63 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 14 5/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs37.1 Hz
Qts0.72
Qes0.818
Qms6
Vas1.31 ft³
Re (one coil)≈ 1.7 Ω
Sd≈ 76 in²
Xmax≈ 0.39″
EBP45 — suits sealed calc.
Sensitivity, 1 W / 1 m85.7 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power250 W

Mounting dimensions

Ø12 3/8″cutout Ø11″mounting depth 5 1/16″magnet Ø≈ 7 3/16″
Cutout diameter11″
Mounting depth5 1/16″
Overall diameter12 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 DL Audio 12″ models