Profile: Granite Audio is a manufacturer of vacuum tube stereo systems. Our product line includes power amplifiers, cables and speakers. Our model 470 RCA interconnect cable is engineered for the ultimate in pure music clarity. The subtle details of vocals and instrumentals flow cleanly through the twin 22-gauge wires of single-crystal SDPS Slow-Drawn Pure Silver, which are also protected by 100% optimized shielding with both continuous foil and silver braid. The ultimate connection is secured by our lockable WBT-0101 Topline RCA connector, which is 24 carat gold over high-purity copper. Our Micro-75 series has both 100% bonded foil and 96% braid shielding for the ultimate in crystal-clear performance, even in the longer lengths required in modern custom home theater systems.