AudioQuest Rocket 33 Speaker Cable Optical Cable Marantz Musical Digital Filtering Yes Marantz Musical Digital Filtering Yes Linear Drive Power Supply Yes Liniear volume control Yes BI AMP and Multichannel option No Shottky diodes Yes Input buffer amp (all inputs CD only) No No System block shielding: Copper metal none No No Yes Double Layer Bottom Plate No Low noise OLED display No Low noise LCD display No Source Direct Yes Power Amp direct No 5mm aluminium top plate No at spec table Air Filled Foamed Polyethylene Insulation — High air content minimises energy absorption and the out of focus effect common to conventional insulation materials Solid Perfect Surface Copper (PSC) Conductors — Eliminates strand to strand electrical and magnetic interaction