Largest delta as you scale gear or highest peak (or both)?
Higher peak, scaling is what I'd expect on Peak/Teton but Stellaris with some crazy tubes takes it to a level above. One week later and still can't believe what I'm hearing. HD800 has a smaller stage to my ears.
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Modded or stock? I think a lot of us have settled on 580s.
Dynamat, coin and no back foam with DIY cable. The headphones themselves are the cheapest component in my system and by a good margin even after tubes, cables, source etc.
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