Picked up a pair of new HD599 headphones after my almost 8 year old HD558 cans started buzzing in the right driver. Decided to spend a bit more and go for the top of the 500 series lineup, expecting to be even more blown away by the fidelity they offer.
First impressions weren't great, bass is a little less controlled, although deeper. Imaging isn't as defined as the HD558s, and any sort of sibilance sounds slightly harsh and almost like listening to a 128kpbs file.
I didn't think much of it at first, expecting them to get better as the drivers wore in. As of current I have probably put around 15 hours of music through them, with next to no improvement.
Another issue I'm having is buzzing from the drivers when the volume is anything past 50%, using my phone or even my PC's separate audio circuitry amp and dac. Switching back to the HD558s, the buzzing is 'different' in the sense that it's not there, aside from the right driver being blown, but you can still hear through it fine, and the overall quality is miles ahead of the HD599s.
The buzzing is only prominent with certain genres/tracks, especially Psytrance/Techno. I know it's not the tracks, as my HD558s were perfect before they developed the buzz using the exact same outputs/files.
I'm torn, I don't know whether to go through the hassle of returning the HD599s for a new pair if they're going to sound the exact same. I can't justify stepping up to the 6 series with my budget and the impedance that comes with them. All in all I want the sound my HD558s had, I'm not sure what else I'd buy if this is the only open back set from Sennheisers new lineup before stepping up to the 6 series.
Any input or tips will be greatly appreciated, cheers!