Summary: These headphones are great. I love listening to my iPod, mostly for podcasts but also music sometimes. I mention this because I am not particularly worried about the quality of the bass or sound as long as it is clear and easy to listen to. And these headphones certainly have good enough sound to hear very well.
I purchased them when I was looking to buy some headphones that were simple, comfortable and worked well.
Summary: I tried sony EX-85LP. When it comes to talking about ear buds fit in ear, it becomes all personal matter. However, I disliked the sony's in ear headphone first for the fit and second for the sound. The bass was just boomy and not precise. And they hurt my ears after using 10min.
I liked the senheiser PX-100 until I needed one that won't annoy people around me at a louder volume.
Summary: I bought these earbuds to replace the ones I got with my iPod and so far, I love them! They fit my ears well and the volume control is extremely convenient for those times when I have my iPod locked. I picked these over the earbuds that you stick directly into your ear canal, since honestly, those kind of freak me out despite possibly having superior audio quality.
Summary: I wanted to get Sennheiser earbuds, and MX660 (with MX760) have the best specs of the current classic line. However, I find the sound of MX660 to be tiring. I would call the sound precise because of very clear highs, but the mid-range sounds too prominent and the bass is very difficult to get without pressing earbuds hard. Altogether they do not make for nice listening experience.
Summary: The Sennheiser earbuds were a replacement item and represented an updated version of the previously owned earbuds. They are all that they have been billed. Strong sound replication and attractive.
Summary: I have always been a Sennheiser fan, and own 5 sets of headphones. Unfortunately, these are so-so. Not a great sound and not that comfortable on the ears.
I hate to admit it, but the orignal Apple IPOD earbuds sound better. I need to also say that I'm an audiophile, and in the upper end of headphones, Sennheiser is terrific. But for low-end earbuds, these do not stand out.
Summary: Very good sound quality, works great. The 'volume control' only controls a small range of volume though. It's not meant to replace the volume control on your device. But otherwise very worthwhile.
Summary: I was running with me MX500's on. The wire got caught on a hook shaped door handle and I broke the earphones, so I needed a replacement.
The MX660s have a single, round tube insulation instead of the kind that clearly separates left and right channels. The wire doesn't twist as much because of this. The cord is Y shaped.
The foam pads that came with the MX660s had a very small opening and fit very snugly onto the earphones.
Excerpt: I'm generally not into big brands and I prefer to supporter smaller companies, but I seem to get through a lot of headphones and I really wanted a pair that wouldn't break within a few months of use. I mostly headphones them to listen to music on my MP3 player, but also occasionally to watch videos on my laptop, so when a friend of mine raved to me about the Sennheiser MX 660 in-ear headphones I thought I'd believe the hype and give them a go.
Pros: Good sound quality, durable, simple but useful design features