I see it does accept input of line level (defined at http://en.wikipedia.org/wiki/Line_level ) but http://www.pioneerelectronics.com/PUSA/Home/AV-Receivers/Pioneer+Receivers/VSX-522-K
only shows stereo line level inputs.
Bob
Does the Pioneer VSX-522-K 5.1 channel AV receiver have 5.1 channel line level output ????

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic