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Black 12-inch car subwoofer with grey polypropylene cone and foam surround in steel basket

KENWOOD

KENWOOD eXcelon KFC-XW1242 12" 4-Ohm Car Subwoofer

SKU CH-3N4R-N6TVY

A 12-inch car subwoofer delivering 1800W peak and 350W RMS power with a polypropylene cone and 6-layer copper voice coil for deep, reliable bass

  • TypeSubwoofer
  • Deep bass down to 38 Hz extends low-end response
  • 350 W RMS handles sustained output without distortion
  • 1 800 W peak power delivers dynamic impact on transients
  • 6-layer copper voice coil with heat dissipation maintains reliability
  • 4 Ω impedance suits a wide range of amplifiers

12-inch 4-Ohm car subwoofer

The Kenwood eXcelon KFC-XW1242 is a 12-inch subwoofer built for car audio systems that need deep, controlled bass. It handles 350 watts RMS and peaks at 1800 watts, making it suitable for listeners who want impactful low frequencies without upgrading their entire electrical system. The 4-ohm impedance works with most mono amplifiers on the market. Its steel basket and ferrite motor provide a solid foundation for daily driving.

Polypropylene cone with foam surround

The durable polypropylene cone resists moisture and temperature changes inside a vehicle door or trunk enclosure. A foam surround allows smooth cone excursion at high output, reducing mechanical fatigue over time. The six-layer copper voice coil improves heat dissipation during long listening sessions, helping the subwoofer maintain performance when driven hard. These materials combine to deliver a frequency response of 38Hz to 300Hz at 82dB sensitivity.

Standard mounting dimensions

Installation follows typical 12-inch subwoofer patterns with a cut-out diameter of 11 inches and a mounting depth of 6-3/16 inches. The steel basket fits most sealed or ported enclosures designed for this size class. Wiring is straightforward thanks to the single 4-ohm voice coil, which presents a simple load to the amplifier. Builders should verify enclosure volume and port tuning match the Thiele/Small parameters for optimal output.

Highlights

  • Deep bass down to 38 Hz extends low-end response
  • 350 W RMS handles sustained output without distortion
  • 1 800 W peak power delivers dynamic impact on transients
  • 6-layer copper voice coil with heat dissipation maintains reliability
  • 4 Ω impedance suits a wide range of amplifiers

Specifications

BrandKENWOOD
TypeSubwoofer

Questions about this item

How often will the foam surround on this KFC-XW1242 need to be replaced?

The foam surround is built for long-term use; with normal care it typically lasts many years before any replacement is considered.

What limits output first during a long listening session with this 350W RMS subwoofer?

The 6-layer copper voice coil and heat-dissipation design manage thermal load, so power compression from heat is the first practical limit.

How hot does the ferrite motor and steel basket get when the subwoofer runs all day?

The advanced heat-dissipation design keeps the motor structure and basket at safe operating temperatures during extended use.

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