Well balanced sound, slightly exaggerated bass makes for a nice warm listen. Reasonably detailed. Highs pretty balanced, but have a few spots with strange dips in the frequency response. Never fatiguing, very portable, comfortable, a good deal for the price.

The PX100s are in the same league sonically as the Koss Portapros, but have a slightly different sound. The PX100s have bass that doesn't get too overbearing, which is good. Highs aren't piercing and extend nicely, and solid mids. The build quality is very good, with pleather material on the headband and a nice sleek design. They are a great value, and offer a slightly warmer-sounding and more balanced alternative to a few other portable phones in the same price range.

A little miracle, for the price. Almost linear, full extended, but the bass, although very quick and tight, is 3 dB over the "ideal line". Very portable (they come with a rigid box for storing safely in your pocket), very comfortable. Mid-highs a little harsh, highs well extended.

Mids good, but a little ruined by the mid-highs. All in all, a great inexpensive portable headphone. And they look cool!

These Sennheiser PX100's are for the most part inexpensive. Although their MSRP is about $60, you can find them on online retailers for as low as $30.

These headphones are hyped up a lot on many reviewing sites, but to me they aren't really all that, and I think you can find something better if you do some more searching.

The sound quality is average at best. You probably could do worse at this price, but you can also do better. The sound in two words is "warm and sweet". Bass on these headphones is actually a bit overwhelming to me comparing more expensive phones like the HD555 or the EH350. Although it does have impact, these PX100's get very boomy to me at times. Though this is a relief for the portable user carrying around a bass-light player or a DJ, for home use I'm looking for the bass reducer. The mids on this headphone are decent, maybe slightly harsh at high volumes and starts to break-up, but very smooth and sweet at normal volume listening. High frequencies were a bit disappointing. These are claimed to sound detailed but not to me--I actually find my $20 Koss UR21 much more detailed than this set. There seems to be a roll off at 12k, and doesn't come back up until a very high number, which makes the treble sound a bit fake, if you will. The soundstage is also notably lacking against some of my cheaper pairs.

Overall, the sound is a relief for some poor output systems, but sound much too boomy and unclear in most sources. Overall I'd give the sound a 4.5/10.

In other aspects, these are some good headphones for the portable crowd. The headphones are fairly small, and the headband also folds up. These headphones come with a plastic case, but must say I have yet to figure it out. These are also very comfortable, although I had replaced the pads with some that are thicker. They suprisingly improve the sound a bit, but no where near enough to turn me away from my current set.

Overall, the PX100s were a disappointment for me. They may impress some portable users, but for anything else I almost guarantee I can recommend a different can. These just don't sound very good to me--too boomy and not really all that detailed. Good for portable users--for others...you can find something better...I know you can.

Nice balance but a lack of everything. Still, pretty good deal for the money - but you will end up wanting more. Maybe good for a portable if you are afraid you will break it or lose it.