The ESB 4.6C is a pair of 2-way coaxial speakers from the 4000 series, designed to bring balanced audio to your vehicle. These 165 mm drivers handle a nominal power of 100W and can reach transient peaks of 200W, working efficiently with amplifiers ranging from 40 to 180W RMS. They cover a frequency range from 55 Hz up to 22 KHz, ensuring you hear everything from deep bass notes to crisp high frequencies. Construction focuses on durability and sonic clarity, featuring a woofer cone made of long-fiber, unbleached pulp with a specialized external treatment. The high frequencies are handled by a high-modulus silk dome tweeter that incorporates high-loss damping material to keep the sound smooth. Supporting these components is a sturdy die-cast aluminum alloy basket and a Y35 ferrite magnet motor, while the aluminum copper-clad vented voice coil helps manage heat during extended use. To ensure longevity and stability, the speakers use a UV-resistant soft nitrile rubber surround and a pole piece made from CNC-machined, cold-forged ultra-low carbon alloy steel. This combination of materials makes them a reliable choice for anyone looking to upgrade their car's sound system with hardware that maintains its performance over time.