Yeah, I though I’d have to explain myself on this at some point lol. So I own a Blu-ray player that is capable with playing any of my albums whether they be SACDs, DVD-A or Blu Ray albums. However, that’s hooked up to its own setup in the living room. My 4.0 Quadsetup is located in my room so in order to listen to albums there I copy over my albums so that I can simply listen to them without needing a TV or dealing with select menus. I guess the easier way is to just by a SACD player, and I definitely intend to do that once I get more disks lol. My setup isn’t anything too spectacular so any degradation in sound isn’t very noticeable.
Quad recordings have been made in a variety of compatability friendly formats. They are playable "In Quad" on any system with a combo player . (Plays DTS CD , DD/DTS DVD, SACD , DVDA , And Bluray such as the Oppo or Sony combo players)
In a five one (5.1) playback system , only the quad should playback over your four speakers , as it does with mine.
So I do not need a 2nd setup to hear the quad recording separately , because they are designed to playback in quad as intended .
There are a number of "quad era" , from the 70's , discs available or at least were made available .
Format Examples..: DTS CD-Steve Miller , Fly Like An Eagle..........DTS/DD DVD - Ten Years After , A Space In
Time.............SACD - The Guess Who -Road Food and # 10...........DVD-A..-.Frank Zappa - Quadiophilliac (4ch and 5.1) ,
and BLU -RAY - Chicago , Quadio Box Set .
Hopefully this information is of some use for you if you wish to hear and play quadraphonic releases available in the newer formats. Compatible playback formats for combo players, that are all QUAD friendly and not just 5.1.