Purist amplification for the connoisseur. The Sapphire series is the most satisfying and musical pre and power combination available from Sugden. This achievement follows a two year period of developing unique circuit designs and concepts. We have redesigned the building blocks of pure class A and through modern high quality components discovered its full potential. The same philosophy has been employed in our Sapphire DAP-800 pre-amplifier, resulting in the exciting development of the Sugden VCV circuit.