FiiO FX17 (1ダイナミック + 4バランスドアーマチュア + 8エレクトロスタティックドライバー) フラッグシップインイヤーモニター

The layered separation across the three driver types is incredible—the Sonion electrostatics add an airiness I've never heard before. That lithium-magnesium diaphragm gives the bass such tight, controlled punch.

Switching from my usual single-driver IEMs, the separation between the dynamic bass and the electrostatic treble is astonishingly clear. The lithium-magnesium diaphragm gives the low end a punch I’ve never felt before from a hybrid setup.

The five-way crossover really makes each driver work together seamlessly—the treble from those Sonion electrostats is incredibly airy without ever getting harsh. Bass hits clean and tight thanks to that lithium-magnesium diaphragm.