These are amazing headphones for any basshead who desires a nice clean sound. Though the balance is a little bit wonky, the clarity is all registers is amazing. The sound isolation is decent. I use these in school hallways and can't hear anything or anyone if the volume is at 50%. The bass is super powerful but to the point that it makes the mids and treble pale. 

These are a Massive improvement on the 100aps, first of all the bass is so much more punchy and rich. Secondly, the mids are much more clean than the former model and the treble is a bit tinny but the punchy bass makes up for that. 

When I got these headphones I was expecting something more than the ex-10lps, but what I got wasn't really that. The treble is very crashy, sometimes to the point which it isn't pleasant to your ears. The mids are alright, only sometimes will they be distorted by the other registers. The bass is lacking, despite the box saying that it has "Rich Bass".  One of the things that I do like about these buds are the fact that they have a very in your face type of sound, this is the only thing that I noticed is better than the 10s, my 10s have a very recessed sound, meaning that it's not a engaging as the 50s. Another plus with these headphones is the fact that when working out they don't fall out due to their design.