I have the balanced Corvina, the older version of the Cassabra, and it works extremely well with the LCD2/3: plenty of power, good control of the bass, very musical midrange and open sound stage.
While undoubtedly excellent headphones, the Audeze LCD2/LCD3 are not perfect--no audio equipment is. These headphones both suffer to my ears from two annoying shortcomings: a smallish soundstage and a mild honking in the mid-range--you can crudely imitate this coloration by cupping your hands over your mouth while talking. I guess this coloration comes from a slight suck-out in the midrange accompanied by a resonance somewhere in the upper midrange. You need a good amp to minimize this coloration. The RWA Corvina--and probably to a larger extent the Cassabra--is a great choice.
The choice of the right cable also plays an important role. Silver wires seem to be the best match for the LCD. I found that the combination of RWA Balanced Corvina /Silver OCC Toxic Cables produced the biggest improvement to my ears to the LCD 2/3 sound. The slightly ripe bass of the LCD became tighter; dynamic impact was more apparent. The veil and honking overtone over much of the audible range were lifted: the LCD inner details became clearer and more articulated; the soundstage also expanded a little. This system retains the intimate, front-row focus, a trademark of the LCD2/3 that makes these headphones such a joy to listen to with Jazz, but now the tighter bass, clearer inner details, wider soundstage and subjectively bigger dynamic contrast add more enjoyment to orchestral and symphonic music. While some rock aficionados may miss the ripe bass, I don't. I find the LCD/RWA balanced Corvina/Silver OCC cable to be a very musical combination.
In my system, the RWA balanced Corvina is the best match with the LCD2/2, the Hifiman HE-6 (at normal listening level) and especially the Sennheiser HD800. The Vioelectric V200 and the Schitt Mjolnir are my second and third choice. The V200 has slightly tighter bass and the Mjolnir more inner details and loads of dynamics but, overall, the RWA produce a better balanced and musical sound that can be enjoyed for a long, long time. Buy ther Cassabra: you can't go wrong.
