I see some similarities in the highs and mids presentation of the hd600 compares to the hd25 and that is why i kind of havê a love/hate relationship with the 600. Despite the peaks, eletrics guitars havê some of the same bite, edge and agressiveness of the hd25 presentation. But in terma of bass response they are very different. At least both plugged to the e12, the hd25 hits much harder and being a on ear closed back it ressonantes much more. Being open back, i doubt the hd600 even touches the same bass present even with high end bassy AMP/DAC.
About the sennheiser qc. Yeah it seems very tight só i pretty much excluded that. They are the way they are.
Yep felt the same about the hd558. Is a slightly warmish, less hifi and less peaky sounding hd600.
You guys who tested the hd600 and silver drivers hd650s.... Wanna specify a bit more about the bass differences please?