I have paired it the most with my Sony XBA N3, like I said. The Walkman and Cayin make them sing. With the M11, I'm more surrounded with sibilance and over sharpness. As if the balanced armature gets overdriven. It is a hybrid with a BA acting as a twitter, mind you. I have some other portable headphones, Sennheiser Momentum M2, Sony 100AP or something, and one iem SE215, but this one is too low ebd to count. All of them quite dark, but haven't give them any playtime, since my XBA are my new babies, I even bought a balanced cable just to get the full experience. In the end, I basically got the M11 because of the XBA N3. I wanted to drive them from higher end sources as all I hear from people going balanced with them is praise, pure praise.