Sennheiser CX 275 S Universal Mobile Headset
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- Universal compatibility with virtually any smartphone on the market featuring a 3.5 mm headphone jack, including Android, Windows Mobile, RIM (Blackberry) and iOS devices
- Signature Sennheiser sound delivered by high powered dynamic drivers for great bass-driven stereo sound
- Ear adaptors in different sizes deliver excellent fit and comfort while providing ambient noise attenuation
- Integrated mic and smart remote for easy management of calls and music tracks
- 2 year global warranty
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This item Sennheiser CX 275 S Universal Mobile Headset
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|Sold By||Ann Arbor||WE GO GLOBAL||BEKIWO||HPP Enterprises||alwayz-on-sale||Amazon.com|
|Item Dimensions||1.4 x 3 x 6.7 in||1 x 2 x 2 in||1.4 x 7.1 x 2.8 in||1.12 x 2.5 x 5.8 in||1 x 1.9 x 6.9 in||3 x 1 x 1 in|
Introducing Sennheiser’s first universal mobile music and communication headset: the CX 275s. Compatible with Android, Windows, RIM and iOS devices, this in ear canal headset offers excellent compatibility with virtually all major mobile smartphone brands using a 3.5 mm headphone jack. With the CX 275s you get legendary Sennheiser audio performance on the go, regardless of which smart phone you have. Different sized silicon ear tip adaptors provide an excellent fit and deliver ambient noise attenuation. Full control is achieved using the in-line remote with microphone for easy management of calls and music track selection. The CX 275s is the answer to complete entertainment enjoyment while keeping you fully connected on the move!
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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 decent, but midrange is vaguely unsatisfying. High end is detailed, 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'm not sure I'd go jogging in the park with them, mainly because I can't jog. But the cords do seem like they'd have problems if they get snagged. But good think I can't jog, so these are *perfect*.