I'm so impress by this headphone consider the price. $40 to $60. I'm comparing to the shp9500 to the hd600 right now.
Sweet! Let us know your comparison impressions!
comfort - shp9500 is way better, less clamp force. I got a big head, user comfort may very. shp9500 just fits snugly on my head, where hd600 is comfortable but I would feel the extra clam force right a way when I switch from the Philips to the senns. If I shake my head hard the HD600 would stay put, the Philips would fall of. I would give comfort to the philips.
Weight - Shp is lighter, I can use this headphone all day.
build quality - HD600 is way better, shp is 5, hd600 is 7 from 1 to 10.
sound quality - I would use them for vocal oriented music, also bass light music. I would not use them for movies/soundtracks, both of them lack sound stage. X2 would be the way to go. So, I'm not going to compare too much of the sound stage and the bass of those two headphones.
1. shp9500 is more sibilant prone/sharp, but not to the point of where it become not enjoyable. The sibilant may make you think it has better clarity, but not so. Shp9500 is a brighter and warmer, Vocal oriented as well, everything is clear. bigger sound stage. Shp9500 attacks the music, being a warmer headphone it will sound fuller or more meat to the vocals, like the x2. I see x2 as a great upgrade to the Shp9500, X2 has bigger sound stage and warmer, fuller vocals, and fixed the soft bass issue, X2 has a little sibilant as well but not overwhelming. When high notes come on, I feel like the singer is pulling away from the mike on the Philips, a great example is when listening to Carry Underwood.
2. HD600 is vocal focus, neutral headphone, the sound signature of both headphones are alike. no sibilant at all. When you close your eyes the HD600 will sound more intimate. background instruments are more present. It handle the high notes way better, it does not fade like the Philips, it stops before it becomes annoying/sibilant.
3. both falls on the lighter side in the bass department, HD600 has tighter and deeper bass. HD600 is lay-back and it plays the music effortlessly, both are fairly slow when it comes to decay.
4. Instrument on the hd600 is better/clear/present well separated, you can pick out different instruments from the left cup to the right with ease. On the Philips instruments sound muddy/hiding behind the vocals, clustered.
I enjoy both headphones, for $40 to $60 Philips is a great buy, and you can use it without amp/ on the go. I know they are a open set of headphones, some may prefer a close back like Ath-m40x, personally I like the m40x better than the Ath-m50x, had both. HD600 is mostly for home use, I try it with my S5 and I sounded good too. Both headphones sound better with a good amp. HD600 new is $300+, used $200+, I got mine for about $200. I would try to find one for $200 to $250, I think that a fair price.
I'm running the HD600 and SHP9500 out of the Grace m9xx amp.
HD650 and the X2 are not bad either. (more bass compare to the HD600, consider "fun" mid/hifi headphones.)
HD600 and HD650 need a good amp, for they are 250 ohms.
HD600 is a upgrade to the shp9500.
X2 and HD650 is a upgrade to the HD598.
I have the HD598 as well, X2 has taking over.
I like the SHP9500 better than the HD598.