I've listened extensively to the D1 through top of the line Sim electronics with Analysis Plus Oval 9 cabling and it is quite good. It disappears, vocals are great and it is dynamic within its physical bounds.
The D2 I've also listened to extensively and they are well worth the extra money. More relaxed than the D1 as it does not work as hard for dynamics or lower range. Vocals were more open, percussion less compressed.
Sometimes the D1 was simply overwhelmed with dynamics in a larger room. For nearfield listening the D1 is probably not stressed.
The D2 I've also listened to extensively and they are well worth the extra money. More relaxed than the D1 as it does not work as hard for dynamics or lower range. Vocals were more open, percussion less compressed.
Sometimes the D1 was simply overwhelmed with dynamics in a larger room. For nearfield listening the D1 is probably not stressed.