BOSS Audio P129DC

12″ subwoofer · dual 4 Ω · 1,300 W RMS

Fs 28 HzQts 0.37Vas 2.44 ft³Xmax 0.47″

Recommended box

For a sedan, one sub, 1,300 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 volume0.71 ft³ (20 L)
Qtc0.78
Fc59 Hz
F3 (−3 dB, no cabin gain)58 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 10 1/16″
Open sealed box in designer

Ported

Net volume2.12 ft³ (60 L)
Tuning (Fb)32 Hz
Portslot 2 3/4 × 14 5/16″, 43 7/16″ long
Port velocity at 1,300 W63 ft/s
F3 (−3 dB, no cabin gain)31 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15 1/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs28 Hz
Qts0.37
Qes0.44
Qms2.31
Vas2.44 ft³
Re (one coil)≈ 3.4 Ω
Sd≈ 76 in²
Xmax0.47″
EBP64 — sealed or ported calc.
Sensitivity, 1 W / 1 m87.4 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power1,300 W

Mounting dimensions

Ø12 1/2″cutout Ø11 1/8″mounting depth 5 9/16″magnet Ø≈ 7 1/4″
Cutout diameter11 1/8″
Mounting depth5 9/16″
Overall diameter12 1/2″

“≈” 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 BOSS Audio 12″ models