I've done alot of Googling and looking at threads but every time I try to do the calculation the answer doesn't make sense.   My headphones have 30 Ohms resistance and have a sensitivity of 100 dB @ 1mW. Source is an iPhone 6 at 63%. Don't really know the maximum output because it is different...

So apparently Amazon allows returns of exchanged items, so I'll be returning my X2. Some upper mids were just way too pronounced and I couldn't enjoy a large part of my music. What I did really like, though, was that the X2 does mellow music really well. I'll just wait for a HD600 sale and buy a...

I mean I sometimes get pain. and if you look at the freq response chart theres a 7 db hump at the 3-5k range, opposed to what i'm coming from, the k545, which has roughly a -6 in that range

Yeah some people have mentioned that the X2 may be sibilant. I get a weird soft "sst" on drums and cymbals but that is ignorable. What hurts are when female vocals make a "eeeee/iiiiiii" sound. I'll burn them in a bit more and after that if it's still painful I'll email Amazon and see if they...

If I really strain I can hear it on my K545s. Really pronounced mids hurt too on these headphones; haven't had this issue before. I saw an ENT early-mid last year because I had tinnitus in my right ear and I had no hearing loss (I'm relatively young).

OK so I just exchanged mine with Amazon and the new pair is sounding much better. Seems like there are duds. Though I still get a weird faint hiss in my right ear when a specific drum hits or a cymbal like sound occurs. Anyone else have this sort of issue? I'm beginning to think that there's...

So I got my X2 today in the mail, and I think I might have a dud. Vocals on this thing seem to as if they're boxed in. Instruments are okay, though I feel like the instruments are drowning out the vocals. I'm using my late 2010 MacBook Air as a source and coming from an AKG K545. Vocals on the...

I tried the HM5 pads with mine and it made the treble much tinnier, so much so that I couldn't listen to k545 for more than 15 minutes before I had to take them off. Also I'm about one year in and the cable begins to have issues; there's a very faint buzzing occasionally when there's pressure on...

So I've had my K545s for about a year now, and I'm very happy with them. I don't have any DACs/Amps and drive them out of my iPhone/Macbook Air and out of an Astro Mixamp when I'm gaming. My main gripe with the K545 is that wearing them for 4+ hours gets uncomfortable and hurts my ears...

I recently bought the HM5 pads after using this headphone for about 10 months as the stock pads didn't have enough depth and stuff (and also a cyst in my ear cartilage that might have been caused by the shallow ear pads lol). The HM5 pads do give you a noticeably larger soundstage and much...

Thanks! Having had both the black and the turquoise, I would say that the turquoise the the better looking one in my opinion. Also, elaborating on the pad size, it is definitely over ear. Its roughly the size of a doughnut (with a larger hole of course)

Unboxing! Part 2! Special thanks to the awesome AKG person who allowed me to switch my replacement order from black to turquoise since black is backordered to December.

My replacement pair currently in the mail. Has anyone owned/listened to both the Sennheiser Momentum and the K545 and can compare them?

Sending my headphones back to AKG for a replacement, had a earcup/cable problem.

Update, whenever I push on the left earcup, the headphones make a popping noise, the left ear is now is softer sounding than the right ear