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1000+ Head-Fier
True. That said, I've heard well amped versions of the above and honestly, despite the roll off on the graph, the LCD-X seems to consistently have more low sub bass. This is using specific tracks with content below 30 hz you can't hear on rolled off headphones. On the Senn. Momentum I hear all of it. On the HD820 I hear 90% of it. On Audeze's Mobius I get about 70%. Maybe 50% (it's there but quiet) on the LCD-X. Almost none of it is heard on the LCD-2 or LCD-3, the LCD-4 maybe 40%.They also measure differently. Lcd-2,3,4 still have completely flat bass response as far as I know whereas the LCD-X has a 3-5db drop-off.
Not easy to describe that. Trying my best. Again, The Abyss headphones (all of them, all open backed, the flagship is WIDE OPEN) prove that open back planars could have incredible low sub bass, while the low mids to true mids won't have the overly present bump found in most LCDs, and won't have the high mid to high end roll off found in all but overly thin sounding newer LCD-1's which end up being too bright instead. I wouldn't care if they charged so much for these inadequacies.
I remember trying a prototype of a closed back LCD-1 (ie. a Mobius like design, but wired and not active with 3D FX) at Can Jam NY and they still were rolled off, in lower sub bass. I remember telling them that and also for God's sake make it so the ear cups extend farther down to fully reach my ears. LOL. Anyway. Granted some don't care about sub bass, or seem fine spending ridiculous money then needing extra gear / wires just to really be full range as they brag about their being.
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