Build quality is good, plug is meaty and the cord is not as thin as most IEMs. Comes with a lot of accessories. Isolation is typical of Ety's which is superb.
 
Sound quality is very good overall and for the price. The bass is I would say is just neutral or for most people, a tad bass-shy and I definitely can understand that. I think this is my only earphone where I got a bit surprised that the bass quantity that I’m used to hearing to isn’t the same. It extends fairly low into the bass and it’s super tight but there’s simply not much quantity that would make you stomp your feet when listening to music that demands it.
 
Midrange is good, upper midrange is so slightly boosted and it gives that extra clarity I think. Treble is good.  Typical of Etymotic.
 
Soundstage is of course small but it is wider (yet lacking height) than most in-ears I’ve heard. Layering is very good but this makes this headphone critical of the source. Play a 128kbps track and there’s a good chance it wouldn’t sound good. This might not also be the best earphone to use for modern RnB and pop music as it may not be satisfying enough in terms of rendering the ‘oomph’ and ‘booms’ of the music.
 
The above is an excerpt from my review of the Etymotic HF5: http://www.headphone.ph/the-etymotic-hf5-iem-review/

This headphone has a great neutral sound but I can see many people finding the bass a bit too lean yet not light. This can be due to poor seal which as mentioned earlier is a bit tough to get for some. I personally did find the bass very good however there are times where I feel it’s a bit lacking. But even with the perfect seal, people who are used to big bass and stuff may find this headphone a bit light in the bass.
 
With a good seal, I think the bass is very good. It’s flat, impactful but not overbearing at all. There’s not much emphasis on the upper bass and lower mids area so it’s not as warm as what I would call as a warm-sounding headphone. Overall midrange sounds natural
 
The treble part is a bit raised but I didn’t find it bright at all as some would call it. It can be somewhat grainy depending on the audio track that you’re listening to but the mid to upper treble region has good clarity for this type of headphone. Some people also find the treble a bit artificial or indistinct and while I did find it to be true, it isn’t really that much. I think some of the AKG's cans have this same treble signature.
 
Soundstage is pretty good for a closed back headphone but perhaps this might simply be due to the cups being too big that it creates that perception. Imaging is average and it gets confusing when I listened to some treble-heavy Dream Theater tracks. But the overall dynamics is good.
 
I only tried Fiio e11 and it did make the bass a tiny bit more prominent but other than there's really not much change.
 
For full review and some pictures, feel free to read the original review post here: http://www.headphone.ph/akg-k550-review/

The Sennheiser Momentum on-ear is a gorgeous-looking headphone just like the original one. The alcantara earpads is very comfortable and the headphone is light so it doesn't feel like its pressing your ears as is the case with most on-ear headphones. That's a major plus to me considering it's on-ear
 
The overall sound of the MOE (Momentum on-ear) is balanced. It is definitely not dark but doesn't sound lean too. Bass has good extension but I believe it's not as full-bodied as say the DT1350. Nevertheless, there's no bloat at all here. Midrange comes of clearly but those who are used to warmer-sounding headphones might find the midrange to be somewhat not forward (slightly recessed). However, the midrange is definitely clear as a whole.
 
Treble comes in prominently starting from the lower treble region. I did find it splashy and a little artificial albeit in a very minor way. The splashiness makes the overall presentation livelier but at the same time, it can sound a bit hot if you have audio tracks that are heavy in this area.  Going up into the higher frequencies, it would roll off gently making the upper highs very laid back. Overall, the treble is a bit uneven and sort of soft-sounding. I feel it's not completely free of grain as well. I think calling it mildly v-shaped is reasonable
 
Soundstage is better than sealed on-ears that I've heard. It's not definitely big the overall presentation doesn't sound too closed. And probably that is related to MOE not having good noise isolation. I have to turn up the volume a bit since it doesn't really block out much. The headphone doesn't leak sound though.
 
Overall, I find this to be a really competitive headphone for the on-ear sealed category. Pictures and some other feedback can be found in my Momentum on-ear review here.

Panasonic RP-HTF600 is one of my first open headphones and because of that I was easily amazed with the openness of its sound signature. For $30, it would be hard to find a headphone of this same type that is as good as this. The headphone doesn't fail in any major way yet still manages to impress me on plenty of ways.
 
Build Quality
 
I expected this to be flimsy but it isn't. It surely is made of plastic and the earcups are made of synthetic materials but even then, I won't call it easily breakable and uncomfortable. Cable is thick, long, single-sided and not removable. I find the cable being long as a convenience since I sometimes use this in my office.
 
Isolation
 
It isolates some and it doesn't leak plenty, both of which are perfect for an office environment. As it's marketed for studio use, I don't think isolation is good enough.
 
Sound Quality
 
Now, on to sound. The headphone overall, with the exception of slightly accentuated bass, has a neutral-dark sound signature. The bass isn’t overwhelming at all however in listening you might find the tonality a bit on the dark/warm side. Bass lacks tightness and is too soft at times.
 
Mids overall are balanced although they can sound a bit distant at times but not recessed. There’s a warmish tilt that can make the lower mids sound prominent however going to the upper mids, the quantity becomes a bit recessed.
 
There's plenty of treble but is not very refined. It sounds soft as well which makes it not sibilant and fatiguing. However, it's hard to find a headphone that has 'decent' treble presence for the price point
 
Soundstage is very good because of it’s open design. I find it larger in width and height than the Superlux cans I tried. There’s a great sense of air and space to it and while instrument separation is below average for an open headphone
 
Overall, the Panasonic cans are a very good sounding headphones especially for its price. Heck, even better than some of the more expensive ones.
 
For the full review and pictures, see my post my review here: http://www.headphone.ph/panasonic-htf600-review/

I got this on Amazon for $199 and can't believe it was initially released for over $500. Nevertheless, the headphones are decent and would satisfy most enthusiasts who prefer clarity and musicality at the same time.
 
Build Quality
 
The quality is good and the product is well made, however, it feels flimsy especially for its price range. Aside from the luxurious lambskin, protein leather and wood,the rest is mainly made of (cheap) plastic. The headphones overall doesn't inspire ruggedness and it's hard to see it surviving if you're gonna throw it to your bed like how you throw your other headphones. The cable is also very thin and double-sided.
 
Isolation is so so. You have to crank up the volume a bit since the cans doesn't isolate well. Comfort is average as it feels odd at the beginning. The cups are large enough (for some) to be a circumaural headphone but the pads are somewhat in the middle. It's a Grado-like bowl pads and for some, it might not be comfortable.
 
Sound quality
 
I like this headphone a lot! The overall signature is neutral, certainly not dark but has plenty of warmth to make the sound enjoyable. Overall the sound is colored but that makes ESW9 sound 'magical'. Bass and midrange are tubey sounding in a way and while treble is somewhat subdued, there's plenty of it.
 
Soundstage and instrument separation is the typical for this type of cans (which is average to say the least) but it helps that the headphones don’t sound too ‘closed’. I’m assuming this is the good tradeoff for it not isolating outside noise well.
 
Headphone plays plenty loud on portable players and I don't think an amp is really needed for it. I tried several portable amps like E11 and it really didn't alter the sound too much.
 
Overall it's a good headphone especially if you like classical, jazz, slow rock, female vocals, etc. Might be a bit slow for faster modern rock though.
 
Posted some pictures in my blog review of the ESW9 here.