The Binary DynaQuattro is technically a 3DD iem with 1 passive diaphragm. And it sounds amazing, well balance, bass is punchy less boomy but can go deep and rumble when need to, mids and treble are just perfectly balance! Its has the natural tonality of a DD and the speed and technicalities of a well implemented BA drivers.. they put one hell of a crossover to tame the 3 DD, no bleeds, all frequency sound cohesive and crisp, sharp and even agile. Sound stage has depth but not too wide. 👍👍
