At the very outset, let me state that I have tried a lot of variety of earphones, from over the ear to intra canal to circumaural...being a hobbyist music connoisseur as well as a composer. Sennheiser is a name to be reckoned with, and if that brand name is not enough, the performance of these earphones leave nothing to doubt. Here are a few salient points about these earphones, and on comparison with other similiar priced earphones (especially a fanboyism like KLIPSCH, DRE, SKULLCANDY,Monster beats and Soundmagic) 1. Absolutely spot on sound stage: I disagree if anyone says the sound staging is lacking. You can virtually pick up each and every instrument playing. For e.g I have tried listening to string quartets tribute to Evansence...you can pick up each and every instrument, right from the overwhelming strings to the diminutive clarinet and harp supplementing the strong chords. 2. ABSOLUTELY NEUTRAL SOUND QUALITY with AWESOME response : If you are looking for bass check...looking for mids check, treble..check!! I havent heard a more neutral sounding earphone yet one which is so malleable and responsive to the equaliser on your music player...I have heard lots about bass of soundmagic and Klipsch...and tried them out too thanks to a friend who owns a store...there is NO earphone that comes even close to the sound quality these offer. 3. COMFORT and ERGONOMICS : Have you all tried all metallic earphones like SOundmagic models?? after 1 hour of use your external auditory canal will start to feel the fatigue and you will start feeling nauseous do to the pressure buildup in the inside ear and labyrinth. These are made of absolute light quality plastic and are so small that often you forget you have placed something in the ear.. These have been made for music...the cord though thin is rubber ensheated..I dont believe even a strong tug can displace the connections. I have burnt in the earphones for approx 100 hours using White and Pink noise (search the net and download the tracks)..these earphones are too good at this price range..don't believe the hype that is built up by earphones like Klipsch...if professionals use a brand, it is Sennheiser..and I am not a fanboy but have actally tried different earphones before I felt these earphone deserve a honest review. If you love your music, I dont feel this is too high a price for these acoustic marvels..these go well with any kind of music....the saxophone of jazz, the blue riffs, the hard metals, the soft strings of classical music...just go for it..avoid fanboyism and biased reviews on some paid web sites!

These buds are excellent quality in-ear type phones. They are very well made and sound fantastic. They have a slightly bass centric response but are a fun set for most music types. Pros: Fantastic tight bass. Good Mids. Excellent construction. L-shapped connector. Comes with an assortment of tips and a carrying case. Cons: Weak Highs. Those in search for a perfectly neutral earphone will be overwhelmed by the bass. Thin cables (yet very durable) Cables produce some interference when rubbing against clothes. No Bi-flange or triple flange tips out of box, but bi-flanges sound superb. Almost nil sound-stage. I have owned these for about 4 years now and they sound better every time I hear them. They open up after a certain burn-in and are always fun to listen to. Not very critical towards music and absolute steal for the price. I would also suggest the Klipsch S4 if you are looking for an overall neutral and sharp sound and if you can stretch your budget a little. EDIT: 07/11/2013 After Four years of rough usage the connector gave away.I just bought the Soundmagic E30 and these blow the CX300 out of the water. Check out my detailed review for the same.

I went for the Sennheiser CX-300 II because of the already established reputation of the company as a pioneer in the sound/music industry. Suffice to say that I was left a tad disappointed. The CX 300 II bass in to the point of non-existent to blissfully mild. I am even disappointed with the highs and lows of this particular product. I would not recommend this to anyone who is looking for value for money. There are lots of good earphones out there within the price range. I would suggest you ought to go for that

first fact that you should remember is that you have to let these earphones burn, what i did with these was that i plugged them into my ipod with a 6hr playlist running and forgot about it.............. this is because when you will use them for the very first time, you will find that the bass is very loose and is overwhelming the whole songs, after you let them burn you will find the punchy bass that these buds are known for. my personal preference is cans over buds any time so i didn't find the bass that great but when you hear to songs like imagine of john lennon and stairway to heaven of zapplin, you will find that it is a very pleasing experience.the soundstage is great but the highs are a bit off. The noise isolation is also good, all in all it delivers most of what it promises which is great considering the price point

I've received these pair of earphones last saturday and been using it continuously ever since.The sound is just great, while my CX 180 had trouble with the vocals having clarity when my bass knob was on 60% on my equaliser the CX 300 faire way better, providing a great mix between clarity in vocals and bass that just tickles your ears the right way. The sound isolation is just wonderful as the only things that I heard while wearing them home were finger snaps directly next to my ear and loud motercycle silencers while riding on the bike.Overall a great product and hoping it'll last as long as my previous earphones. Would recommend 8.5/10