They passed the ultra-deep bass test. Treble is crisp. The bass doesn't have the *wow* factor, like my VAVA dual-driver bass earbuds, but it is almost as ear-hair vibrating. 😊 I love the construction! That gets an AAA+++ from me! The wires look like they are encased in a fine steel mesh, under the outer silicone layer, which is super-important, as much as I use earbuds - hours daily, every day (I have 2 pairs, because I spend my time at 2 different houses...don't have to worry about forgetting to take my earbuds with me, just leave a pair at each place). The noise cancellation is excellent! Nice zippered carrying case, extra buds of several sizes...you definitely get your money's worth!