Hot on the heels of Chicago's recent induction into the Rock and Roll Hall of Fame, the celebration of the legendary "rock band with horns" musical legacy continues with a new boxed set that includes quadraphonic and stereo mixes in high resolution 192/24 DTS-HD Master Audio on nine Blu-ray Audio discs. Housed in a rigid two-piece box, nine albums are presented in sleeves that replicate the original release down to the last detail, including mini posters, and the iron-on that came with Chicago VIII. To ensure optimal sound quality, Rhino has remastered each album in both it's original quadrophonic and stereo mix on each disc, and so that the quadrophonic mix will play on surround sound systems. CHICAGO QUADIO spans seven years and includes eight studio albums, in addition to Chicago IX: Chicago's Greatest Hits. The group's long string of jazz-rock mega hits includes: "Make Me Smile," "Saturday In The Park," "25 Or 6 To 4," "Feelin' Stronger Every Day," "If You Leave Me Now," and many more. Quadraphonic sound, or 4.0 surround sound, utilizes four audio channels connected to four speakers positioned at the corners of a listening space. The multi-tracked audio is mixed dimensional, immersing the listener in an expansive soundscape. Quadio is a Blu-ray with 192/24 resolution Quadraphonic and Hi-Res Stereo mixes transferred from the original half-inch four-channel masters.