pataburd
Headphoneus Supremus
Three years later and the K501 continue to please. The K701 are a distant memory. And the "Quincy Jones" Q701 didn't make me bat an eye! : )
...The K701 has the best bass of the three,..
The high impedance of the K601 was to help it integrate into a pro studio environment that had historically seen high impedance headphones. I remember that some of the early Sennheiser headphones were 2000 ohms impedance.
The K601 was obviously the fully open AKG design for the pro market, and if some audiophiles wanted them, then fine.