SeeAudio Yume 2BA 1DD Earbuds Hybrid Drive Unit Earphone HIFI Monitor IEMSeeAudio Yume with Liquid Silicone Diaphragm DD Unit The SeeAudio Yume is equipped with a 9. 2mm dynamic driver unit which features a new Liquid Silicone Diaphragm material. Liquid Silica gel is extremely insensitive to temperature changes, thus this allows a consistent output with extremely low distortion. The DD unit handles the lower end and provides a rich, textured lower end with a powerful deep response. It complements the other frequencies