These earphones maybe only be single driver units but they are so refined and very articulate. I have only been using them a short time but they have impressed me and only fall short compared to their more expensive stablemates the Westone W20 in the...Read more deeper bass regions. The mid range detail and clarity is excellent and beats most others I have heard in this price range. There is also an expansive soundstage and ambience I have found hard to come by in all but the more expensive phones. In summary these are high on detail and clarity. If you are looking for boom and tizzy’s look elsewhere.