New hybrid constructions evolutionary sound signature The all-new hybrid construction of 13mm beryllium diaphragm dynamic driver and quad-Knowles custom balanced armature drivers with two high-mid and two ultra-high. With the DUNU’s professional and experienced tuning techniques over the hybrid headphones DK-3001 Pro is able to present all the details from the music and deliver high-level sound performance bringing the classic hybrid IEMs to the next level. Beryllium diaphragm dynamic driver-powerful bass response Newly developed 13mm beryllium diaphragm dynamic driver adopted the beryllium coated technology utilizing its lightweight advantage and the high elasticity and rigidity acoustics character bringing out the powerful and responsive bass to its max level and delivering a well-defined mid-low frequency range. Two independent Knowles balanced armature driver-two independent Knowles BA driver for high-mid frequency Two independent Knowles BA drivers for high-mid frequency layers of details in vocals to ignite every bit of expressions from the artists. Two Knowles ultra-high balanced armature driver-impressive ultra-high presentation Two Knowles ultra-high balanced armature drivers deliver superior performance in ultra-high frequency allowing you to enjoy the transparent and natural sound of the music. New dimensions stainless steel housing - Ergonomic design superior comfort Precision machined S316 stainless steel housing combining with scientific design it effectively eliminates harmonic resonance to enhance sound cohesiveness as well as to achieve a clean and crystal-clear sound experience. Ergonomic-design-focused and data-driven research has been made to obtain the most comfortable wearing experience for the front housing shell and muzzle tilt angle. Double refined high purity OCC copper cable-ensure audio quality with lossless sound transmission DK-3001Pro OCC copper cable is embraced with the double refining techniques extracting the high purity single crystal again to achieve higher and purer copper wire. It greatly ensures the audio experience by reducing transmission loss. DUNU patented quick switching connectors Patented quick switching ...