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12-inch black subwoofer with rolled rubber surround and IMPP cone

Pioneer

Pioneer TS-A30S4 12" 400W RMS 4-ohm Car Subwoofer

SKU CH-9CW9-C5ACM

A 12-inch component subwoofer delivering 400 W RMS through a single 4-ohm voice coil for deep bass down to 22 Hz

  • TypeComponent Subwoofer
  • 12-inch IMPP composite cone delivers deep, punchy bass down to 22 Hz
  • 400 W RMS power handling sustains high-output low-end without distortion
  • Single 4-ohm copper voice coil ensures efficient amplifier matching and reliable performance
  • Rolled rubber surround with polycotton spider resists heat and fatigue for long-lasting durability
  • 87 dB sensitivity produces strong output even with moderate amplifier power

12-inch 400W RMS component subwoofer

The Pioneer TS-A30S4 is a 12-inch component subwoofer built for car audio systems that need deep, punchy bass. It handles 400W RMS and 1400W max power through a single 4-ohm voice coil with copper wiring. The IMPP composite cone and rolled rubber surround keep distortion low even at high volume. It suits daily drivers and high-energy listening alike.

Thermals and power in normal use

The ferrite magnet structure and aluminum voice-coil bobbin dissipate heat efficiently during extended play. The elastic polymer surround and polycotton spider maintain mechanical control, reducing compression at high output. With 87 dB sensitivity, the subwoofer reaches strong levels without demanding excessive amplifier current. The 4-ohm load is easy for most mono amplifiers to drive cleanly.

Upgrade path and when it matters

This subwoofer replaces a factory woofer or a lower-power aftermarket unit when you want authoritative low-frequency output down to 22 Hz. The jump is worth it if your enclosure can provide 1.25 cubic feet sealed or 1.5 cubic feet vented with a 3-inch port. Builders who need a dual voice-coil configuration or a shallower mounting depth than 152 mm should look elsewhere.

Highlights

  • 12-inch IMPP composite cone delivers deep, punchy bass down to 22 Hz
  • 400 W RMS power handling sustains high-output low-end without distortion
  • Single 4-ohm copper voice coil ensures efficient amplifier matching and reliable performance
  • Rolled rubber surround with polycotton spider resists heat and fatigue for long-lasting durability
  • 87 dB sensitivity produces strong output even with moderate amplifier power

Specifications

BrandPioneer
TypeComponent Subwoofer

Questions about this item

How do I mount the TS-A30S4 and what clearance mistake should I avoid?

The subwoofer needs a 152 mm mounting depth; allow at least that much clear space behind the baffle so the magnet and vented pole piece do not hit the enclosure wall.

Which parts of the TS-A30S4 are most likely to need replacement after extended use?

The rolled rubber surround and polycotton spider can fatigue over time; the voice coil former may also require re-coning if driven beyond the 400 W RMS rating.

What is the first limit I will hit when running the TS-A30S4 hard for long periods?

Thermal compression on the 46 oz ferrite magnet and aluminum voice coil bobbin will raise coil resistance, reducing output before the 400 W RMS mechanical limit is reached.

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