FiiO M15S Desktop Music Player $999 Review

https://www.enjoythemusic.com/magazine/equipment/0823/FiiO_M15S_Desktop_Portable_Hi_Res_Audio_Lossless_Music_Player_Review.htm

Performance was so good with the expanse that I had no qualms stepping over to the HiFiMAN HE6se which is my hardest-to-drive headphone. Queuing up Speakers Corner Quartet’s “Further Out Than The Edge” (24-bit/44.1kHz – Qobuz), again I was able to get excellent dynamics out of lower than expected gain settings, this time “medium gain”, but I quickly moved up to “ultra high gain” which put loud at about 107 out of 120 with this electronica / jazz / hip-hop quartet, easily scaling the amp’ed up bass and percussion. Once again the result was wonderfully musical despite the HE6se’s heavy lean into the top end. Even with the USB power disconnected, I was able to get acceptable power levels out of the M15S though it did indeed perform better plugged in.