I had a listen right out of the box for a about 2-hours. These are my early impressions.
What was apparent the moment I had a listen was the incredible sub-bass rumble. I could feel the cups rumbling down my head as they slid into place.
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These are lacking in my preferred department out of the box. The SR2 sounds noticeably muddy, running single-ended out off a smartphone (Lg g7 quad dac). Switching over to the Meze classics’ balanced cable running off Audio-Opus #2 I noticed more impact and an increase in separation/quality. I believe the stock cable may be the way to go, though I lack the amp to utilize it effectively. An even better source/amp, I think, will make these sing.
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That sub-bass…. is too much, this may be preferred by some but not for my genre of music (classical -dynamic orchestra). It dominates at times while everything else is just slightly placed behind and just a bit quieter. IMO they could use more punch(quick attack and decay), and crispness.
Taking off the headphones while playing music, I can hear parts I considered drowned off by the sub-bass. They make nice miniature speakers, they even vibrate onto the table. The Sub-bass may be too pronounced. I believe burning-in may tame it to an extent. I’ve tried the hd800 and owned the hd598 so I have an idea of what open back headphones feel like. These both feel and sound like a closed-back. Its a keeper for me, a compliment to highly detailed and at times dry IEMs. I'll try to check in near or over the 100hr mark.
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Reviews claimed these do not leak as much for an open back. I think these claims were made in comparison to other open backs. THEY LEAK, just as much as any open back, I would assume.