Sound Rhyme PRADO 4 EST+12 Balanced Armature Hybrid Flagship IEM Resin shell, handmade 4-way crossover , 4 tubes Driver: 4 EST + 12 Balanced Armature 4 Sonion EST for ultra- high frequency 4 Knowles 31736 for high frequency 4 Sonion 28u for middle frequency 4 Sonion 38aj for low frequency...