Originally Posted by tourmaline
The interlinks didn't have the transparancy i want, so i will go for a higher model, but they made hd650 sound, faster, more natural and complete under control.
p.s.: I also tried improvising a "0 ohm" situation by connecting my headphones to the speaker output of the amp (no worries: I knew what I was doing ) and with the 650 I heard an improved bass control and subtly reduced (bass) presence, but just a small difference overall, nothing dramatic. For the rest, the balance was identical and the overall sound from the amp's headphone jack just as detailed and pleasing. The treble sounded the same.