What volume level to use as a line-out (with Fiio E11)?
I just bought a Beyerdynamic DT990 headphones (250 Ohms version) and a Fiio E11 amplifier. I bought the latter thinking that my X7 won't be able to power the DT990 un-amped. Wrong. It turns out the player works beautifully even without the amp - it's loud enough at 37/40 and sounds great. At 40/40 it's too loud. When I connect the E11 the sound seems a bit fuller, but the difference is not one of night and day. I wonder if others see a more significant difference? Has anyone managed to figure out the optimal volume level for use as an alternative to a line-out?