The ESB 4.100 is a pair of 4-inch midrange speakers from the 4000 series, designed to enhance the vocal and instrumental clarity of a car audio system. These drivers handle a nominal power of 100 watts and can reach transient peaks of 200 watts, operating with a nominal impedance of 4 ohms. They cover a frequency range from 120 Hz to 10 kHz with a sensitivity of 89.2 dB, ensuring a balanced and efficient output for the midrange channel. Construction focuses on durability and precision, featuring a long-fiber, unbleached pulp cone with a special external treatment for stability. The internal assembly uses a high-grade N52 neodymium magnet and a large aluminum copper-clad vented voice coil, all held securely by a die-cast aluminum alloy basket frame. To ensure longevity and smooth movement, the speakers utilize UV-resistant soft nitrile rubber surround suspension and CNC-machined ultra-low carbon alloy steel for the pole piece. These speakers are well-suited for enthusiasts building a custom front stage who need more headroom and air movement than smaller drivers provide. Each pair comes with deluxe protective stainless-steel grilles to keep the cones safe from debris and accidental contact during daily use.