Below are excerpts from the review:
“At the end of the day, ddHiFi Surface is all about music, smoothness, fluidity and no harshness, no grain, and no abrasive parts, it has enough resolution and can reveal details well enough to be considered a high-end model, but it is the farthest thing from an analytical sounding IEM as it can be, so I would totally recommend the Surface if you wanted to experience bass and vocals, with zero fatigue and with a recessed, rolled-off and smooth treble.”
From：Audiophile Heaven
