The CX300 II is a pair of in-ear headphones which produce a fun sound signature. Bass is tight and punchy, mids are smooth and warm and the highs have fairly good detail to them.
Microphonics can be annoying though, so these may not be the best headphones to use if you do a lot of running or walking while listening to your music.
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Pro Fun sounding with deep and punchy bass, smooth and full mids as well as good detail from the highs
The bass is the highlight of the sound signature. It goes deep and has very good punch too, yet at the same time stays fairly controlled. The mids are present and quite smooth, though not too forward.
The highs do not stand out as amazing, though the level of detail is fairly good.
Overall, a very good sounding pair of in-ear headphones which bass lovers will find to be quite enjoyable.
Pro Cable feels reliable
The headphone cable feels high quality and does not seem like it would break easily. They are also fairly flexible so they should not be too prone to tangles. The strain relief on the connection points of the cable to the earpiece keeps it from detaching easily when yanked.
Pro Fit and isolation can be customized
The CX 300 II come with 3 sets of ear tips in small, medium and large sizes. These are easily interchangeable so you will have some options when it comes to fitting these headphones.
Con Microphonics can be distracting
If you wear these in-ears while walking around, the movement of the cable can be clearly heard in the earpiece (called microphonics), which can be quite distracting.
Con No in-line controls or mic
You will have to pull out your phone when answering calls or changing music tracks when using these in-ears.