It's really surprisingly good, the performance from the 2.5mm balanced is far superior than the single ended. It pairs very well with the Solaris, I originally bought it as a convenient player that I didn't have to use the iematch with for the Solaris (I didn't like how it changed the SQ), expecting it to be significantly worse in terms of SQ to the cube but its not the case. With the SR25 the Solaris sounds more detailed, has better layering (putting this down to the lack of hiss vs the Cube) and has tighter bass. The Cube sounds more analogue, holographic with a bigger soundstage in comparison but the hiss is too much without the iematch. With the Legend X it's a completely different story, the SR25 feels congested and narrow in comparison to the cube and the bass seems to bleed more into the rest of the FR, it sounds like a completely different set of IEM's on the Cube. I guess this is just a testament to how many factors can come into peoples impressions so everything should be taken with a grain of salt.