Pioneer TS-A25S4

10″ subwoofer · 4 Ω · 350 W RMS

Fs 39.2 HzQts 0.72Vas 0.80 ft³Xmax 0.34″

Recommended box

For a sedan, one sub, 350 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 volume1.20 ft³ (34 L)
Qtc0.93
Fc51 Hz
F3 (−3 dB, no cabin gain)43 Hz
Example box (outside)12 3/16″ × 12 3/16″ × 20 3/16″
Open sealed box in designer

Ported

Net volume2.05 ft³ (58 L)
Tuning (Fb)33 Hz
Portslot 1 9/16 × 14 5/16″, 23 1/8″ long
Port velocity at 350 W64 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 11 1/2″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs39.2 Hz
Qts0.72
Qes0.81
Qms6.5
Vas0.80 ft³
Re3.5 Ω
Sd53 in²
Xmax0.34″
Vd18.2 in³ calc.
Mms121 g calc.
BL11.3 T·m calc.
EBP48 — suits sealed calc.
Sensitivity, 1 W / 1 m84.3 dB calc.

General

Size10″
Voice coils4 Ω
RMS power350 W

Mounting dimensions

Ø≈ 10 3/16″cutout Ø9″mounting depth 5″magnet Ø≈ 5 7/8″
Cutout diameter9″
Mounting depth5″

“≈” 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 Pioneer 10″ models