Pride M.25 12 D0.75 (M25.12D07)

12″ subwoofer · dual 0.75 Ω · 2,500 W RMS

Fs 35.5 HzQts 0.39Vas 0.98 ft³Xmax 1.34″
The published specs don’t add up:

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 volume0.88 ft³ (25 L)
Qtc0.57
Fc52 Hz
F3 (−3 dB, no cabin gain)70 Hz
Example box (outside)15 3/8″ × 15 3/8″ × 10 3/16″
Open sealed box in designer

Ported

Net volume1.59 ft³ (45 L)
Tuning (Fb)32 Hz
Portslot 1 15/16 × 14 3/4″, 43 3/16″ long
Port velocity at 2,500 W118 ft/s
F3 (−3 dB, no cabin gain)30 Hz
Example box (outside)31 1/2″ × 16 1/8″ × 11 11/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35.5 Hz
Qts0.39
Qes0.42
Qms5.3
Vas0.98 ft³
Re (one coil)0.75 Ω
Sd82.2 in²
Xmax1.34″
Vd110 in³ calc.
Mms288 g calc.
BL10.7 T·m calc.
EBP85 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.7 dB calc.

General

Size12″
Voice coilsdual 0.75 Ω
RMS power2,500 W

Mounting dimensions

Ø12 13/16″cutout Ø12 1/8″mounting depth 7 3/4″magnet Ø8 11/16″
Cutout diameter12 1/8″
Mounting depth7 3/4″
Overall diameter12 13/16″
Magnet diameter8 11/16″

“≈” 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