Just recieved the NFB-6 yesterday, I left it burning in at home, hopefully I'll get the balanced cable before new year and I'll give new impressions.
It's sounding okay out of the headphone jack but there's something missing, it sounds a little be veiled and trebles seem a bit brittle. The amp isn't very dynamic, though they give my LCD-2 a lot of juice. Hopefully I'll change my view with burn in and using the balanced output.
¿Is there a diference in power between normal jack and balanced output?
Yes, give it a week of heavy use.