Our 9.2mm for the lows and 6mm dynamic drivers for the mids are equipped with a Liquid Silicone Rubber (LSR) surround. This technique of making the surround allows the driver to perform with a very low THD (Total Hormonic Distortion). The Al-Mg Alloy diaphragm of these drivers are light but stiff, which makes the performance surprisingly fast, very deep and precise. A Super Strong Rare Earth N52 Neodymium Magnet, allow the driver to perform better in more demanding situations, with less distortion at any operating level. In addition, we have added to our 6mm driver a double N52 Neodymium Magnet, to decrease even more the THD and increase the SPL without increasing the size of the driver.