So... I have been spending some quality time with Hiby R6 Pro and the pairing with Solaris is very very good. I’ll be updating my review once I have some more time with it (along with iDSD Micro BL). I’ll also provide a comparison to JVC FW10000
Compared to 1Z, the R6 Pro is quite neutral, with great transparency and clarity which brings additional air and benefits imaging. Soundstage isn’t as grandiose though, the 1Z still has the edge in height and is significantly taller while width and depth is fairly similar. 1Z has more body and weight and is overall thicker.
The R6 Pro provides a lot of headroom pushing a whopping 750mW @32ohm balanced and it shows. It also features a much lower output impedance at 0.28 ohm vs 0.94 ohm balanced for 1Z. Bass is meatier with a tad more mid bass, a snappier attack and sub bass can be downright thunderous on bass heavy genres while not loosing control either. Mids are smoother and more balanced, with a tad more lower mids and less upper mids emphasis compared to 1Z. Highs are a bit less energetic compared to 1Z the lower treble energy looses a little bit (I like 1Z better there) but upper treble have a bit more presence.
All in all, I like the R6 Pro pairing just as much as the 1Z, both highlights different facets of the Solaris.
@twister6 I’d love to get your impressions on the Solaris pairing with Cayin N8 by the way