Pride BB.3 12 D2

12″ subwoofer · dual 2 Ω · 1,250 W RMS

Fs 28 HzQts 0.28Vas 1.13 ft³Xmax 0.91″
The published specs don’t add up:

Recommended box

For a sedan, one sub, 1,250 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 volume0.67 ft³ (19 L)
Qtc0.46
Fc46 Hz
F3 (−3 dB, no cabin gain)83 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 9 11/16″
Open sealed box in designer

Ported

Net volume1.41 ft³ (40 L)
Tuning (Fb)26 Hz
Port2 round ports Ø2 1/2″, 26 1/16″ long
Port velocity at 1,250 W204 ft/s
F3 (−3 dB, no cabin gain)65 Hz
Example box (outside)30″ × 15 3/4″ × 8 11/16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs28 Hz
Qts0.28
Qes0.318
Qms2.32
Vas1.13 ft³
Re (one coil)1.8 Ω
Sd74.4 in²
Xmax0.91″
Vd67.4 in³ calc.
Mms330 g calc.
BL18.1 T·m calc.
EBP88 — sealed or ported calc.
Sensitivity, 1 W / 1 m85.4 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power1,250 W

Mounting dimensions

Ø≈ 12 3/16″cutout Ø11″mounting depth 6 1/8″magnet Ø≈ 7 3/16″
Cutout diameter11″
Mounting depth6 1/8″

Qes and Qms are not on the spec sheet — calculated from Qts, motor strength BL and Re.

“≈” 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 Pride 12″ models