Summary: I'm impressed by these headphones and I've only had them for a short time. I feel they are worth the money spent, quality construction as well.
Pros: Very fast shipping to an APO address, they only took 6 days to get from VA to Okinawa! Clean sound. I'm hearing things in songs that I haven't heard before! Great sound, cranked up a bit, and my wife sitting a few feet away from me ( in our home office) can't hear anything I'm listening to. I love how these cans cover my ears completely too. It's great they come with a 1/8" to 1/4" adapter in case one wants to plug them into your A/V receiver for movies or music.
Cons: Seem a bit big, but not really a con as I don't plan on travelling with them. Not that much bass, but I didn't want headphones overpowered by bass. Long cord, but it's easily secured with a twist tie.
I got these headphones around Christmas time in 2012. I loved the design at first sight, I find it understated and classy where others find it hulking and ugly, it's all a matter of opinion. After the excitement of unboxing them and plugging them straight into my phone I was horrified by how quiet, lifeless and lacking of detail they were. But rest assured this first impression didn't last long.
Pros: Great detail especially in the treble, Well defined bass, Outstanding soundstage, Extremely comfortable, Built like a tank
Cons: Treble can be harsh at louder listening, Not enough bass for bassheads (Not a con for many)
Summary: I have been using AKG K550 for past few weeks and enjoying them pretty well. This is my first foray into mid fi and I think its a solid contender for getting into mid fi sound especially as it has very low barrier for entry (whole setup). I am driving it with Audinst hud mini, entry level dac/amp and it drives it with authority and good clarity.
I have been using Sennheiser HD518 extensively, and have auditioned HD595 as well as HD650 before this.
Summary: Excelllent headphones, coming after ss 9h headset, senn's 429 558 598 and i love these most, i differentiate details better in vocals now, i can say if vocalist is blowing into microphone while singing, there are more details in vocals which i cannot explain in english, coz i'm not good at this section in english. Bass is not overwhelming, it is what i like most, not muffled, also if you EQ the bass it will sound much better as it did on my nokia with eq presets.
Pros: Non-overwhelming bass, detailed vocals, great soundstage
I got these headphones around the national holiday. These came out about 2 years after I had got my K701. I was first attracted by its classy design and colour. I thought I would never get another pair of AKG headphones since K701 has been my favorite all the time. I finally decided to purchase a pair due to the discounted price of $180 USD including shipping in my country; and most importantly, I needed a closed can(s) to enjoy music at night without...
Pros: Open Stage, No Congestion at High Volumes, Quality Built, Reference Response Curve, Comfort
Cons: Artificial Treble (can be improved with burn in & DAC/amplifier), Earcups Maybe Too Large For Some
Summary: I tried these with a Benchmark DAC1, a Fiio X3, a Fiio X1+E17 and various lesser devices including an iPhone. They seem pretty easy to drive. Music was a mixture of classical and Jazz - both CD quality and HiRes.
My value rating is based on the £107 I actually paid from Amazon. I am having to keep reminding myself how cheap they now are in order to give them much praise though.
Pros: Spacious - for closed back. Non-fatiguing, easy going sound. Work surprisingly well with iPhone.
Cons: No better than a reasonable £30 pair of open back 'phones.
Summary: This a review, as well as bit of a comparison to the Focal Spirit One, as those are the last headphones I owned and I absolutely loved them.
Man, where to start with these; right off the bat let me tell you that I absolutely love them. They are totally different from the Spirit One, and in a very positive way. When I first got the 550's, I was surprised at how heavy the box is.
Pros: Sound, Overall quality, Comfort, Closed-back but they don't sound like it, Bang for the buck
Cons: Non-removable cable, Cable is very long (3m), Can be hard to drive from small devices, not recommended for small heads because of sealing issues
Summary: When I purchased my AKG K550, I was in the market for a closed-back headphone that gave me the best open-back sound while containing the noise so I could use them in a dorm room. The AKG K550 does that and much more.
After a few days of pink noise break in and heavy music listening, they really showed their true high-performance colors.
Pros: Balanced response, Versatile, Closed-back with an open sound, Build quality
Cons: Lack-luster with classical, ears touch drivers, take a while to break in, lose some personality with time