Pioneer TS-A30S4

12″ subwoofer · 4 Ω · 400 W RMS

Fs 32.1 HzQts 0.70Vas 1.98 ft³Xmax 0.33″

Recommended box

For a sedan, one sub, 400 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 volume1.73 ft³ (49 L)
Qtc1.02
Fc47 Hz
F3 (−3 dB, no cabin gain)38 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 8 3/4″
Open sealed box in designer

Ported

Net volume2.93 ft³ (83 L)
Tuning (Fb)34 Hz
Portslot 1 3/4 × 14 5/16″, 15 7/8″ long
Port velocity at 400 W65 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 14 13/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32.1 Hz
Qts0.70
Qes0.792
Qms6
Vas1.98 ft³
Re≈ 3.4 Ω
Sd≈ 76 in²
Xmax0.33″
EBP41 — suits sealed calc.
Sensitivity, 1 W / 1 m85.7 dB calc.

General

Size12″
Voice coils4 Ω
RMS power400 W

Mounting dimensions

Ø≈ 12 1/4″cutout Ø11 1/16″mounting depth 5 3/8″magnet Ø≈ 7 3/16″
Cutout diameter11 1/16″
Mounting depth5 3/8″

Only Qts is published — Qms assumed to be 6 and Qes calculated (barely affects box design).

“≈” 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 12″ models