Short product description:
JVC CS-J420X is a round 2-way car speaker with a 10 cm woofer and 2.5 cm neodymium tweeter. Rated power is 21 W with 210 W peak, impedance 4 Ω and frequency range 45–22,000 Hz. Woofer uses a ferrite magnet (74 g magnet weight for the tweeter), mounting depth 4.31 cm and sound pressure up to 90 dB. No amplifier or subwoofer included. Do not open housing.