Got a Burson Playmate 2 with a Hifiman Arya Stealth.
The Upgrade from a ZXR to the Burson was already a HUGE step. Had at this time only the Beyerdynamics DT 700 Pro X.
Back to Topic!
For my AMP/Setup it makes the sound warmer, smoother!
Soundstage was gettiing bigger with switching the Duals on I/V stage and to put the singles (LP stage) in addtionally it feels like i am getting a bit smaller soundstage, but still got more warmness/smoothness!
These are worth purchasing!