Grado SR225e, Audio Technica M50x, Beyerdynamic DT770Pro(80ohm) & DT880 SE(250ohm), Aiwa ARC-1, Hifiman HE-4xx, Bose Soundsport Free, 1More Quad Driver, Dunu DN-2KJ, TFZ Exclusive 5, cmoyBB 2.03, EarStudio ES100, Little Dot Mk II (stock tubes for now - still burning in)