The ESB 3.28 is a pair of high-frequency silk dome tweeters from the 3000 series, designed to bring clarity and precision to quality car audio component systems. These 28 mm speakers feature a Torcon® soft dome and a high-loss damping suspension, which work together to deliver a smooth response across a frequency range from 900 Hz up to 25 KHz. Inside, a copper-coated aluminum wire voice coil with aluminum support is paired with a powerful N42 neodymium magnet. To ensure stability and longevity, the units utilize an SVS ventilation design that prevents air compression and optimizes cooling, while iron-fluid oil damping further refines the sound. With a nominal impedance of 4 Ohm and power handling of 90 Watt, these tweeters reach a sensitivity of 91 dB, making them an effective choice for listeners who want detailed highs without overloading their amplifier.