Car speaker JVC CS-J420X round 2-way 10 cm woofer, 2.5 cm neodymium tweeter, 210 W peak, 21 W rated, 4 Ω impedance

The JVC CS-J420X is a round 10 cm (4") 2-way coaxial car speaker designed to upgrade in-car audio. It has a peak power of 210 W and a rated power of 21 W, a 10 cm woofer with a ferrite magnet and a mounting depth of 4.31 cm, making it suitable for many standard vehicle speaker openings while remaining compact and lightweight at 230 g.

Advantages

The CS-J420X provides clear two-way sound reproduction from a compact 10 cm driver, with a ferrite magnet that contributes to reliable low-frequency performance. Its 210 W peak handling allows compatibility with a range of aftermarket head units and small amplifiers, while the 90 dB maximum sound pressure level ensures audible output in typical car environments. The shallow mounting depth and low weight simplify installation in tight factory speaker locations.

Suitable for

• Replacing or upgrading factory 10 cm (4") car speakers
• Compact car doors, dashboards, or rear parcel shelves with limited mounting depth
• Systems driven by standard head units or small external amplifiers

Key specifications

• Model: JVC CS-J420X
• Type: Round 2-way coaxial car speaker
• Diameter: 10 cm (4")
• Peak power: 210 W
• Rated (RMS) power: 21 W
• Maximum sound pressure level: 90 dB
• Woofer magnet: Ferrite
• Mounting depth: 4.31 cm
• Weight: 230 g
• MPN: CS-J420X
• EAN: 4975769413797

How to use

Disconnect the vehicle battery before beginning installation. Remove the existing speaker grille and speaker, check mounting hole compatibility, and place the CS-J420X into the factory opening. Secure the speaker with the original screws or supplied hardware, connect the speaker wires observing correct polarity, and reassemble the door panel or grille. After installation, test playback at low volume and gradually increase to confirm correct operation and polarity.

Recommendations

For optimal performance, match the speaker to a head unit or amplifier that supplies appropriate power near the rated 21 W RMS. Ensure proper polarity when wiring and avoid overdriving the speaker beyond its peak power to prevent damage.