Overall difference between the KH-K1000 and the D2000:
KH-K1000 are much warmer, have MUCH more bass, have better PRAT and a more natural presentation. Very engaging.
Less detailed and a bit hollow sometimes.
D2000 are more detailed, more refined, but also less engaging. Strident, almost sibilant highs sometimes. Much lighter in overall presentation.
I also promised to compare the Kenwood to the JVC DX1000.
I basically used the same music as I did in the D2000 comparison.
My conclusions are simple:
Bass is equally strong and good on both phones.
The Kenwood soundsignature is much warmer overall.
Soundstage in the DX1000 is larger.
Imaging and separation of the DX1000 is better.
The DX1000 walk all over the Kenwood in regard to refinement and detail.