Pros: Loud, pretty easy to drive, Out of this world Bass, Comfy
Cons: Too much Bass, Sibilant/Harsh treble, Flimsy
The sennheiser cx300 was my first headphone of Sennheiser and my first earbud/headphone above 30 Dollars. The construction of the earbud itself is very great and the design too, small, classic, lightweight. The cable is pretty flimsy in the jack i had 2 pair of cx300, and both goes this way.
In terms of sound, these deliver a outstanding, in your face bass. I have some issues with that because the mids are sucked out. The highs are harsh and sibilant, i experience a little pain with those.
If the cable were not flimsy, i was paid $50 or $45 for this earbud, but both are gone in about two months..