I am really having trouble deciding between the K550's and K545's.
I just bought the Fiio E10 to go with my macbook pro using a system wide EQ program called boom (btw I love that program, performs wonderfully).
I am currently using my HD439's bc they are my best closed backs I own at the moment (I own HD558's but in college dorms it's just not worth it). I really want that soundstage and instrument separation while still having a warm sound to it. Will my E10 warm up the K550's and retain it's clarity? Or would the K545 be the overall better option? Either of these will be my primary at home cans, I will not travel with them.
Hi I've got the 550, 551 and now the 545. I think there is product variation in the same models so take my comments with a grain of salt.
The pair I love is the 551. It has the best soundstage of the 3. I wanted a closed back for walking around and coffee shop use but I feel pretty self conscious in the 551. I thought the 545 would be perfect but it's not. Well, it's perfect in terms of looks, I wouldn't feel silly..
The 545 just doesn't seem very special to me. With the 551 I get "lost" in the music. It's hard to describe but with the 551 I don't feel like I'm listening to the music, more that I'm just enjoying it. With the 545 the soundstage feels boxy and on my sample the high end doesn't sparkle as much as the 551. Snare drum cracks don't sound quite right on nthe 545. The net effect for me is that the 545, while very good makes me focus on the 545 and not on the music. The 551 does not have this issue for me.
Having said all of this I may end up keeping the 545 simply because it is very good for a portable headphone.
Also to echo dweaver I did notice the same things as him regarding seal. I at first complained that when I moved my head just a little bit the seal on the 545's would break giving a hollow sound momentarily. Just like dweaver though, while out walking around and a little humidity build up I noticed the seal was fine. Either it's that or the memory foam takes a while to snug down. Oh, regarding comfort, the 545's are fine for me, but the 551 is even more comfy. The 551 has none of the pad setting issue for me regarding getting a seal and it doesn't break the seal if I'm moving my head around.
So, sorry to confuse you even more. I think you need them both..
I'm trying to convince myself I can be satisfied with just the 545, but I don't think I can. It's great for out and about, but at home the 551 is just more gratifying.
Oh, the sources I'm running thru while out and about have been Fiio X3 (flac and mp3), iPhone 5s and Classic iPod 160gig.