The ESB Harmony Blue Note HB1.6C is a set of two 165 mm coaxial speakers designed to bring balanced audio to your vehicle. These coaxial units feature a paper diffuser paired with a rubber surround, which helps maintain structural integrity while delivering a natural sound. An integrated silk dome tweeter and a neodymium magnet work together to handle a frequency range from 65 to 18,000 Hz, ensuring that both mid-range tones and higher frequencies remain clear. With a nominal power of 50 W and a peak of 100 W, these 4 Ohm speakers provide a reliable performance with a sensitivity of 88 dB. Their physical design is tailored for straightforward installation, requiring a mounting diameter of 144 mm and a depth of 58 mm. This compact build makes them a practical choice for drivers looking to replace factory speakers with a more refined audio setup without needing extensive modifications to the door panels.