A qualidade do som é ótima, como em todos os fones da Razer. Other than that, a nice shoe for the price, but not as light and comfy or flexible as my Go Walk 4s. Great shoes, waterproof, comfortable, but the material easily disintegrated in the sense that the rubber at the front in just one 12 hour shift has already began to not really rip but wear out. oops, thats a different product review. So my previous pair wore out, and I spent a long time searching for whatever current model they have that has wide bands with padding. The amplitude is not uncomfortably loud when turned up (dial on the lead wire), and the dial is easy to grab and adjust. But linking them together change a lot sound wise and Im happy with my choice so far. The ER2 is a bit sibilant compared to hd600, though itself is definitely not. Plus they have good support. Wont buy this brand again.