These are indeed very fine resolving headphones. Think Magneplanar Tympani speakers! Then you'll understand.    Quote:

NOPE! Bass is NOT weak. Just realistic. Very similar to the much vaunted Yamaha HP-1's of the same vintage. These both were AKG killers in their day, and darn respectable now for Opera and Classical music. I own them both and STAX Lamda Pros as well as a few odd AKG pro. monitor phones...

Soime here may be interested in these. Just found them rummaging about resouces and links in the diy audio forums/amplifier/tube/valves: online tube learning for newbies. I bought some and thoght to spread the word they are avail. Anyway, have a look.  ...