First impressions on the Lambda Sigs:
Setup: iMac/iTunes (mostly lossless)-->DAC1-->SRM-1/MK-2-->Lambda Pro Signature
Tunes: All kinds, but mostly rock with some classical, celtic, and jazz thrown in.
Effortless. Fluid. Engaging. Captivating. These phones are everything I had hoped and then some. I can listen to these for hours (of course my ears do sweat a bit, though). The Sigs actually remind me of the Harbeths I heard with the HR Desktop Audiophile system at CanJam. If distilled to one word: sweet. Female vocalists: sweet jesus, they sound great. Guitars, too. The phones just hit the right notes (no pun) with me. It's like they bring into clearer relief the best characteristics of the tunes I like the best. I think this is probably the mids because the bass in this setup is not necessarily big. But the bass is defined and punchy. Soundstage is lovely. Instruments seem generally to be in the right places, lots of air. Still a headphone, but a big improvement over the 650, which still trends toward the "three blobs" to me at times. The Sigs are also fast and agile, while remaining articulate and refined. Just an overall superb listening experience, and as of right now, the most satisfying setup I have owned.
The negatives are few. This setup is pretty merciless with regard to poor recordings. I suppose that's par for the course. And up top, things are a little splashy/sparkly right now, with some sibilance (but not what I would call etch). I think that could be the DAC1, which has that tendency. The question is whether to upgade the DAC or the amp. I'm thinking the latter (for now) and am leaning toward the GES because the Sigs could use a touch of warmth. It seems like they would benefit from power and tubes. Does that make sense? Do you guys think that would provide some better synergy with the Benchmark (which was a gift and may not be easily sold for that reason)?
EDITED for typos and some other crap.