Awesome. Previously I had used CX 180 for 1½ years. I can clearly say that CX 275s is way better than CX 180. Bass, treble is too good(Good in the Sense which u can expect for around 2k). The wire is little thin. Though I had faced the issues with CX 180 such as the left ear piece not working etc, Sennheiser replaced it with the an unboxed new piece(as it was under warranty). That's the best part of Sennheiser. U get 2 years of warranty which u never get with other earphones.
Final verdict...

I've been using these earphones for 5 months now, didn't buy these from flipkart though. The sound quality is amazing, decent bass and sennheiser has lived upto its name. They are good for everyday usage, not for heavy bass lovers though. The wire is quite fragile. At this price, a solid built quality is expected. Overall, a wonderful product.

In terms of sound, Sennheiser does deliver the best audio clarity and excellent bass, sounds awesome to people who listen to edm, trap etc.
The bass sounds boosted, however it does produce clear and distictive low/ mid range frequencies and does not distort.
The noise cancellation is terrific
*UPDATE*
I used this product for a year now and i never experienced any problems regarding its build or sound....
Highy recommended.

Awesome headphone, works very well with my htc. Never expected such a sound quality with maximum noise reduction. I feel every pinch of sound let it music, movies, FM. I would definitely recommend to buy this product. Taken care properly this headphone has a lifetime of 2 years.

The earphones are good they have a good bass and frequency distribution, speakers are good though not much functionality offered with the button. The jack dosen't seem very sturdy though.

It's a very good pair of headset having good response to all the frequenies. Bass is good, can be tuned to sound punchy with the help of equalizers. Overall a good earphone pair. Should've had volume control to add icing on the cake.

Very good quality earphones deliver good bass if you use listen songs which are of good quality listen song dheere dheere by honey Singh you will experience a good effect in bass of this song( surround)

Overall audio quality is good, decent look, 2 Years warranty, Brand Name, however other brands also can be considered since the same quality can be found, not recommended for bass lovers at all in my opinion - Sony MDR-XB30EX Extra-Bass & Philips SHS8100 is offering excellent quality in 1.5-2K without mic.

This Earphones are the best in the range

Bass is good but not as as punching as JBL

Mids and low are clear And has great clarity I'm using this for 2 months I recommended this to my friends they were also happy !


I'm kind of JBL Fan but this is really great product

Good bass,treble . Also has clear voice. If the ear piece had a better shape it would be much better. Also bring in more colours.