Sennheiser MX 660

81% of reviews on Amazon.com give this product a positive rating.

Love the audio quality.. clean, sharp, bassy clarity of music. What you'd expect from Sennheiser. The volume controller slider works well, enough friction to where it'll feel tactile

Where to begin ; Volume could be higher, even when blasting player, pushing slider all the way up should yield louder volume ; Volume slider should have been where left channel and right channel separate, instead, it's about an inch below a random...

Great set of phones with a nice rich, deep bass sound. Why are you still wear those white buds?

Not horribly expensive ; nice extras like a foam block to wind the wire and a coin-purse thing to carry them in ; not uncomfortable ; Mostly good sound

frequency response seems just a little 'off'. Bass and low mids seem a little boosted. The relative lack of treble kills clarity ; volume slider seems kind of pointless (volume can be cut approx. 50%). I would rather have a less expensive product...

Great sound

Too small to fit in my ears so I use part of an earplug to get them to stay in

Very high quality across the board. Very handy. Comes with a little carrying pouch if you need something like that. I'd buy these again.

Sound Amazing. The best earbuds you can get for under 100 period

Not SUPER loud.. but loud enough so that everyone around you can fully understand every word of the song your listening too

The sound is amazing from these earbuds. Way better than the Zune HD earbuds with great bass. The bass is not too loud nor too low, just about right. Good enough for me to fall asleep while listening to music. The pads took me 3 mins to install, so no...

The earbuds have excellent acoustic clarity for most frequencies. People looking for a booming bass sound will be disappointed. My friends recently gave me a set of Bose earphones which are much more expensive, but the Sennheiser has far better sound...

These were a great replacement for my Sennheiser MX 500s, which lasted several years. I'm a bit rough on my headphones as I use them for hours on end during my work day, in bed at night, under my helmet when biking, doing house and yard work, and while...