We decided to use a dynamic driver that was precisely tuned for our requirements, giving a smooth and rich presence to the middle frequencies. Middle frequencies are not easy to define well. They contain the most versatile information in music and if well tuned, make you feel being right in the middle of your music. Our dynamic driver is featured with a ‰Û_High-precision Acoustic Levelling Chamber‰ÛÏ (HALC), finely tuning the sound of our dynamic driver to highest accuracy. Development of this high precision component was a demanding challenge and is exclusively featured in Vision Ears ELYSIUM.