The Penta Hybrid technology enables us to deliver harmonized sound frequencies without overlay of phase issues. For sound from the drivers to reach your eardrums it has to pass from through the housing/nozzle/ear tip assembly. The seamless functioning of 5 drivers is enabled by the very specific and precise length of each sound tube which basically determines the air volume in front of each driver in particular.Our design eliminates imperfections that you can find in regular plastic Tube and Dampener systems, which are commonly used in multi-driver assembly. Ergonomics at its best. Pure comfort.The feeling of airiness and seamless fit.The comfier the IEM, the better the listening experience, this is a fact. Serious audiophiles will spend hours on end engaged in their music.We have designed the RAI In-Ear Monitors to deliver comfort and prolonged listening sessions allowing for a truly immersive experience for you and your music.Attention to detail to an extreme: round, soft edges designed to embrace the natural curves of one’s ear and to fit perfectly.The Rai Penta works effortlessly with any device due to its low impedance and high sensitivity but to truly enjoy the potential of its painstakingly tuned driver array, we recommend a high-resolution source. The response is super high resolution and is above any certificate or standard.A balanced sound signature with impeccable micro-detailing provides unrivaled realism all across the wide frequency range, from 4Hz to 45 kHz.The highest purity Silver-plated Copper wires terminated in finely crafted metal plug shells ensure that cable assembly will stay strong and reliable for a long time. There are 4 wires. Each wire consists of 20 litz strands. MMCX plugs are top quality and plug termination is rhodium plated for best connectivity and durability.