Sennheiser CX300B MK II Review

Ultra-lightweight Sennheiser earphones that pack some heavy bass.

Sennhesier cx300B MKii earbuds review

Whereas Sennheiser tends to be associated with high end expensive headphones with wide soundstage, the Sennheiser CX300B Mark II’s are essentially the opposite: budget earphones that pack a lot of bass-y punch. These earphones actually don’t pack as much punch as their predecessors: the CX300 earphones. Those earphones have been on the market for a few years now and have become one of the most popular earphones for sporty activities. This new iteration has a more balanced approach to the bass, as well as improved mids and highs. The result is an incredibly robust pair of earphones that can play pretty much anything you throw at them.

For example, my favorite track to sample with these earbuds is Metallica’s “Enter Sandman”. The earphones did a great job of bringing out the energy of the song as well as the force of Lars Ulrich’s drums. In fact, even if you don’t like this particular song, I encourage you to try it just once with these earphones.


  • Dynamic speaker systems for powerful, bass-driven stereo sound
  • Good attenuation of ambient noise
  • iPhone, iPad, MP3 Compatible? Yes.
  • Asymmetrical cable to avoid tangles.
  • 2-year warranty

Harmonious Genres:

classical, jazz, rock, top 40.

Genres to Avoid:

gaming, movies.

Comfort Factor:

-Like most in-earphones, the CX300Bs come in three sizes to fit most ears. I found the medium ones fit me and created that seal you need to get the best sound.
-the light-weight design meant that you will probably forget that you’re wearing them.

Who Is It For?:

The CX300B Mark IIs are my recommendation for the best earphones on a budget. They also rank #2 on our list for the Best Headphones under $100, narrowly losing out to the Klipsch Image S4s (which are twice the price).
For people looking for some fun, high quality earphones that they can use anytime and anywhere.
Sennheiser CX300B MarkII headphones review