Uncompromising audio superiority the dk4001 hybrid configuration of a dynamic and balanced armature driver has been carefully engineered with premium precision machined parts to account for the bass control and to ensure an excellent listening experience'. '.strtoupper('h')i res 5 driver hybrid earphone the construction of high performance 13mm beryllium diaphragm dynamic driver and 4 knowles high extreme frequency balanced armature drivers generate precise performance at all frequency'. '.strtoupper('z')irconium alloy housing precision machined zirconium alloy housing effectively suppresses harmonics to achieve remarkable acoustic performance'. '.strtoupper('t')he housing widely reduces the weight while increasing the durability by being 3 time stronger than the stainless steel'. '.strtoupper('i')t also features wear resistance and anti corrosion enhancement'. '.strtoupper('i')ntroducing a.c.i.s'. '.strtoupper('w')ith the high performance beryllium driver and the patented a.c.i.s'. '.strtoupper('s')ystem, a spiral designed pathway to improve bass controls, the all new dunu dk4001 is able to deliver impactful bass with depth in bass extension and promote the music engagement'. '.strtoupper('e')mbracing the challenges to create all kinds of possibilities has always been dunus goal'. '.strtoupper('f')urutech occ silver mixed cable the dk4001 features high purity furutech occ silver mixed cable'. '.strtoupper('t')he configuration of quality cable and additional occ wrapped shielding layer delivers cleaner and higher fidelity sound by minimizing the distortion and blocking out the electromagnetic interference'. '.strtoupper('d')unu quick switching connectors patented quick switching connectors, 4 connectors in total 3.5mm stereo, 2.5mm balanced, 4.4mm balanced and 3.5mm pro attached'. '.strtoupper('e')ach are easily changeable with the autolock feature, which provides audiophiles with the convenience of switching from one device to another'. '.strtoupper('c')atch hold mmcx connector patented mmcx connector utilizes the hollow cylinder design to lock the earphones and effectively improve the connectivity'. '.strtoupper('t')ogether with the standard mmcx jack, it ensures wide compatibility and increases the service life'. '.strtoupper('e')rgonomic driven design effectively using the lightweight characteristics of zirconium alloy and ergonomic friendly design, the dk4001 is designed for superior comfort and wearing experience, so you can enjoy your favourite music in every moment'. '.strtoupper('h')andmade leather bag art of handmade fine leather, the standard soft touch carrying bag gives you all the needed space for your favourite dk4001'. '.strtoupper('s')pecially designed spinfit eartips dk4001 equipped with the spinfit cp145 eartips'. '.strtoupper('i')t is designed for multi drivers earphones'. '.strtoupper('o')ptimizing the comfortability and allowing the sound to transfer to your ear more smoothly than ever'. '.strtoupper('a')ccessories, all you need and more dunu delivers audio quality and exceptional experience'. '.strtoupper('t')he standard accessories that come with dk4001 include quick switching connectors, leather bag, spinfit cp145, dunu steel plaque, airline adapter and cleaning brush etc'. '.strtoupper('m')aking sure to fulfil all demands from audiophiles.