Sennheiser CX 275 S Universal Mobile Headset

First of all,i purchased these headphones exactly on november 10th of 2015,that is a little bit more than a year and they still sound exactly as the first day.I thought the wire was too thin and weak,but surprisingly the wire lasted a whole year,i will purchase these again today because there's a noise on one side but besides that,they work fine.i completely recommend this to buy.Update:Has been more than a year since I bought these headphones,it's going to be my third pair and again they last a whole year.I am getting new ones today because again one side stopped working,the first ones I got them on november 2016 and the second ones I got them on november 2017 hopefully this ones will last until January 2019. Great sound and very durable.

The earbuds themselves are great! High quality like most of sennheiser's products. Sound quality is great and crisp. If you compare them to the cx 300 II they feel a lot lighter, but also a little more flimsy in that regard. So far they have survived a lot so that isnt too much of a worry. Also if you like heavy bass you might want to try the cx 300 ii, the cx 275 focuses much more on a balanced crisp sound.They are also fairly comfortable and i can keep them in for a long time. They also do come with different sized buds so you can pick the one that fits best.The reason though these earbuds lost some points is the carrying case they came with. If you are a frequent sennheiser buyer, you know how nice the cases are. They are a very nice faux leather with lining. The last pair of sennheisers i had came with a verry nice one that snapped shut, but this one sucks. It has those annoying little draw strings to keep it shut. It womt stay shut unless you tie the strings together, not to mention the knots keep coming undone. I hate those little knots too they use, its like the one knot you have to spend twelve million years mastering to get it right too. After one month i could probally work in a factory making these little cases since i had to retie them one billion times. At the very least it protects the earbuds, but still Really a big set back if you ask me.

If you want beautiful sounds that takes advantage of your entertainment packed smartphone look no further. If you have a Galaxy series android with voice control or equivalent. These are perfect. The don't have a volume button. So use your voice with the built in microphone for that. The button controls calls, music player, and video player without issue. The sound is clear, powerful, and very pleasing leaving nothing to be desired. I hear sounds I didn't know existed in the music I listen to. The price is more than fair. The are much more at senheiser's website so take advantage of amazon's rock bottom prices & deals. 2 year warranty. I lost my galaxy note 2's original headphones and they are always sold out. These have comparable sound quality and a leather pouch for storing.

Edit May 2018. Has it been 3 years already? Well these buds are still going strong, the cables are in good shape. My opinion of the sound quality has shifted a bit for the worse however. The clarity and detail is just not there. In comparison to a truly great set of buds they sound muddy. I go back and forth between these and a set of Etymotic HF2 of a similar age, about 3-4 years ago. I actually love the Etymotic sound as the clarity is simply amazing. They are audiophile quality with one exception and that is bass is pretty weak. But otherwise they are just revelatory and I would listen to them exclusively except the rubber on the wires is just disintegrating for no apparent reason. I have to patch them with Goop glue to cover the bare wires. They are a hilarious mess now. I have no faith in Ety cables and can't bring myself to buy any more only for the cables to fall apart after 2 years. At any rate, as for these Sennheisers, if you are coming from stock cheap earbuds that came with your phone, these are pretty good. If you want really great sound and listen to buds all day long (in my case some days), well, I'm still looking for the best buds that are worth the investment.Lightly edited original review:These are the best sub-$50 buds with mic I have tried and are an easy recommendation. The frequency response I would place on the neutral, accurate side, with strong bass going quite deeply but having a definite bass boost that is bad or good depending on how you want to use them. (See below.) The high end is smooth and inoffensive, not spectacular or super crisp but not strident. The midrange is fairly balanced though a bit muddy. I would not say these are high end audiophile buds, they lack the detail and musicality of the better ones for sure, however for everyday working phones with mic, hard to beat, and much better than the stock dreadful Samsung buds or the cheap $7 Panasonics so many people rave about (have two pair of those). The cords are extremely quiet with about the least 'microphonics' noise I have encountered. Durability of the rubber has been excellent. Volume is very good, my phone drives these plenty loud. The mic sounds good on phone calls and video recordings.The noise isolation is decent but not great, assuming you can a decent seal with the 3 different sized rubber covers. I was able to get a good comfy seal with the larger set. Sealing with this type of single wall flexy rubber is never going to get you great ear-plug type noise isolation, but aftermarket expanding foam or custom molded silicone tip covers can do better. Also note that an airtight seal is not the same as a guarantee of good noise isolation. The best noise isolation in my experience comes from the three-flange silicone rubber tips you can get on Etymotic buds. But they are not very comfortable. Next would be expanding foam. Next is custom fitted ear molds. Finally, these typical single wall silicon flange things.Also note that bass response on ANY earbud goes way up when you have an airtight seal in your ears. On the CX275S with a good seal the bass is probably at least 20% too much for me. Most people will probably be happy with that because 'bass boost' seems to sell. Probably very intentional on Sennheiser's part in that a lot of reviewers will complain about any perceived lack of bass and it will be the kiss of death in the marketplace, fair or not. BUT I am pragmatic about it - in noisy environments extra bass is helpful because outside low frequencies tend to get through your ear seal. Also you can leave the buds unsealed a little bit in order to allow some ambient sounds to come through, which can be useful and much safer like when you are out road running or walking, and still get some bass, so the bass overemphasis is again an advantage in those circumstances. If you want a sealed earphone with flat frequency response, you will have to use an EQ on these.I have by no means tried every earbud out there, but I have used high end in-ear phones for about 25 years. I started with the cream of the crop - Etymotic ER4S, which I still have and are pretty much a reference standard for accuracy, flat frequency response, and smooth musicality. They are pretty astonishing with audiophile material, and given a very tight ear seal the bass reaches down deep and accurate, but the problem with such high end audiophile buds is that the output is quite weak. If you have a headphone amp, great, but on a smart phone, on 100% volume the sound is just too weak for any but the quietest environments. I also have a pair of Etymotic HF3 phones with mic which were $150, which developed a buzz in one driver after a year. The HF3s are not the equal of the ER4s but they are far better with a smartphone because the volume is higher. The HF3 frequency response doesn't have the annoying bass bump that most cheaper buds have. You can seal the phones in your ear and not have to adjust the EQ. I would place the CX275S as not on par sound wise with the HF3 but at less than 1/3 the price, they are far more affordable especially if you use them hard, damage cords, lose them, etc. Well, not buying any more expensive Ety's especially when they break. I have used on ear Sennheisers HD series for years and thought I would try their buds and that was a good call.In snooty audiophile terms: Clarity is only decent, but midrange is vaguely unsatisfying. High end is smooth, not particularly sweet or buttery smooth but not offensively strident. The midbass is a bit boomy which is my biggest gripe and probably the only reason they are not as good as the HF3s. The boominess did seem to get better after breaking in for 30hrs or so. Or maybe I just got used to it. Aforementioned overemphasis in deep bass, correctable with EQ. The soundstage is a bit close and indistinct, but this is true of most in-ears. Basically if you are in a quiet listening environment and being critical with FLACs you would want better cans. But out and about, in a noisy environment, working out, on an airplane, with a phone with not much amplifier power, listening to Spotify streams and mp3s etc. these are satisfying and likely won't completely offend your golden ears. If you loose them or the cord breaks or a driver starts buzzing, well, you can pick up another pair for what I paid ($42). Good deal.

I used to use a pair of easy-in, easy-out earbuds for everyday wear, and another pair with the expandable foam tips for wear while running. These have replaced both of them! The fit is very good for me, they stay in while running and are easy to pull out and then put back in (to have a conversation or whatever). There's no volume control, just pause and skip-ahead controls. Have used them a few times for phone calls and nobody on the other end seems to notice I'm using anything odd - what they hear sounds normal through the built in mic. One odd thing - on my Motorola Droid 4, when the phone "sleeps" the controls on the headphones don't work. I have to use the clock's nighttime setting where the phone stays on in a dimmed mode for the controls on the headphones to keep working. Probably a phone specific issue. These are my second pair of Sennheiser headphones and I think my next pair will be from them again - well built and great sound!