Radial Engineering JPC Stereo PC-AV Active Direct BoxThe JPC from Radial Engineering is a stereo direct box that has been specifically designed for connecting computer sound cards and other consumer electronic products to a professional sound system. It combines the advantages of transformer isolated inputs with an active drive circuit. Transformer coupled inputs isolate the source from the destination. This eliminates 60 cycle hum and buzz. Because the active circuit does all of the impedance