Needs no introduction! Amazing integrated, fully differential dual-mono design from the famous Canadian Audiophile firm Simaudio in Black and Silver finish . I'm the original owner purchased the unit from Audio-occasion december 2011,i have pay 7800 $ plus taxes , warranty 10 years I have the original sales receipt . original power cord , remote , spikes . Sonically 600i is powerful Amp with impressive blend of timing and refinement.I have the original double box for save shipment .