Pride M.25 15 D0.75 (M25.15D07)

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

Fs 31.4 HzQts 0.44Vas 2.53 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 volume1.25 ft³ (35.5 L)
Qtc0.76
Fc55 Hz
F3 (−3 dB, no cabin gain)54 Hz
Example box (outside)17 11/16″ × 17 11/16″ × 10 3/4″
Open sealed box in designer

Ported

Net volume3.60 ft³ (102 L)
Tuning (Fb)31 Hz
Portslot 4 1/2 × 17 1/16″, 52 1/2″ long
Port velocity at 2,500 W63 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 18 1/2″ × 22 7/8″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs31.4 Hz
Qts0.44
Qes0.48
Qms5.25
Vas2.53 ft³
Re (one coil)0.75 Ω
Sd131 in²
Xmax1.34″
Vd175.3 in³ calc.
Mms362 g calc.
BL10.6 T·m calc.
EBP65 — sealed or ported calc.
Sensitivity, 1 W / 1 m88.7 dB calc.

General

Size15″
Voice coilsdual 0.75 Ω
RMS power2,500 W

Mounting dimensions

Ø15 5/8″cutout Ø14 9/16″mounting depth 8 1/4″magnet Ø8 11/16″
Cutout diameter14 9/16″
Mounting depth8 1/4″
Overall diameter15 5/8″
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 15″ models