Have a pair black Sennheiser Eco phones and quite impressed, but music a little sharp, so bought these '400's'. Very impressive, you certainly feel that not only are you at the recording, but almost in the microphone ! Certainly the best I have used.
Minor gripe : Volume control smooth at low settings but all or nothing at top end. But such things are unimportant, nothing can detract from the quality of sound these little beauties produce. Thank you Sennheiser !