CAST is far larger and more natural sounding than balanced on the Krell. I've compared the balanced and CAST versions of the same cable into two different inputs of the KCT and feel that CAST wins hands down. CAST is highly recommended.
The system I heard the CAST comparison on used Tara Labs The One XLR and The One CAST, not the cables Krell sells. For a fair comparison you should compare with Siltech CAST cables.
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