Below are excerpts from the review:
“The ddHiFi Surface offers a warm-balanced, musically pleasant presentation with a focus on coherence and musicality rather than conveying details.
Its overall tuning leans towards a smooth U-shape, minus the elevated treble. It features a sub-bass-focused low-end, a clean and slightly reserved midrange, and a polite upper region with a solid ear-gain region. It’s not as airy as some of the units from Moondrop, such as the Blessing 3 or the Variations, when it comes to the upper treble region, but it does not feel claustrophobic either.
I found the tuning quite safe and believe it’ll work well for most audiophiles. It doesn’t go out of its way to wow you at first listen, yet it builds appreciation over time thanks to its musicality and coherence.”
From:Headfonia