Recessed mids, booming bass. Treble seemed okay. Not sure how efficient they are, because I needed to turn up the volume just to hear the vocals properly, but then everything else was too loud. The sound also seemed distant, where I wasn't getting a good stereo effect in my head, instead I felt like I was listening to two speakers in my ears. Tried the different tips, but that didn't help with any of the problems. Also, fresh out of the box the L connector was slightly flaky in the jack. These would be fine for the dollar store, otherwise pass.