Interesting that some of their earlier, more successful titles didn't get mixed into quad at some point. But also true that none of their albums are any I would call essential titles. They were always much more of a singles band. I was kinda hoping someone would say that the 1974 Greatest Hits package saw a quad release.![]()
A quad version of the Greatest Hits album actually showed up in some pre-release lists (and is mentioned in @Mark Anderson 's quad recordings not released list) but sadly never made it out. There's a story from around that time that with ABC in the terminal decline that would lead to their bankruptcy and sale to MCA, as a cost-cutting measure, ABC president Jay Lasker ordered that all tapes other than finished stereo masters be disposed of to save on storage costs. This included original mono masters, and also multitracks - I read somewhere else that a Mamas and Papas Greatest Hits quad mix was abandoned because the multitracks were gone, so it wouldn't surprise me if the same fate befell the Three Dog Night release as well.
I've mentioned this before, but in that era labels were generally in the business of selling 'new' music - ABC didn't get in to quad until well into 1973 (and out by mid-1975) so that's why you see the vast majority (or maybe all?) of their quad mixes are from that time period. Also from a production cost standpoint, it was much cheaper and more efficient for them to have a current album mixed in stereo and quad at the same time, than it was to go back and find all the tapes for an older album along with a studio and engineer with the right equipment to make it sound something like the original stereo mix.