The Noble Ronin is the long awaited successor of Noble's multi-award winning Katana all-balanced-armature in-ear-monitor.  While the Katana had 9 balanced armature drivers, the Ronin features 4 Sonion balanced armature drivers for sub-bass and bass frequencies, 4 balanced armature drivers for mid-low and mid-range frequencies, and 4 electrostatic drivers for high and super-high frequencies.  The Ronin has excellent bass response without bloat, sublime mids and resolving but not fatiguing highs that bring out nuanced details in music that will lead you to listen to all of your favorite music tracks again and again.