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If you are looking for an immersive musical experience in the home without outlaying a small fortune

the Progression Preamplifier features an optional digital module

when we first heard these cables

The superior low-level linearityachieved by this design reveals extraordinary detail for the kind of transparency normallyexperienced only during live musical events

Nagra Reference PREAMP Second Power Supply?:No If you are looking forFor all of its nearly three quarter of a century existence, Nagra has been, first and foremost, research and development driven. With decade after decade of groundbreaking innovations, Nagra has set lofty standards in diverse categories of audio devices. This is nowhere more apparent than in our high end, high performance audio division. When introduced, Nagras HD line set new technical and sonic standards that reflected years of thoughtful research