mystery muffled mids


I have a year-old setup I enjoy very much. B&W D3 805s and Hegel H590. Sound is really great. Imagining fantastic. every second with it is pleasure until I try to play classic rock. Anything by Led Zeppelin sounds like someone has smushed the sound and it lost the mid range, imagining disappears. I tried playing louder but live with too many people around to be able to do that constantly. And it did not improve anything noticably. 
I normally stream from Tidal via Audirvana. Anything by Bill Frisell, for instance, sounds phenomenal. You feel you can grab the instrument from the air. I mention this since he uses similar instruments to Zeppelin. Bowie's stuff sounds awful, as does Queen. I know they should sound better. Kind of Blue is fantastic. Gaucho, Sea Change, Elephunk, Wildfloflowers, Know what I mean? -- all great. To a friend, I said that this means bad recordings sound bad. The friend said that's not it. what do you say? How can I improve the sound? thank you in advance.
petar3
If you must use Zeppelin as the reference, the only releases to use are the 2014 Jimmy Page remasters or the original flat transfer CDs, circa 1986, 87.
High quality records will be costly.

There are other remastered CDs through the years which are bright sounding but these should not be used as reference.

EKR - Retro Rock through TuneIn Radio is reasonable with AAC - 128 kbps. Currently playing the Immigrant Song. Not bad at all, although I prefer listening to my own sources.
Interesting that it happens with more than Zeppelin. MC makes a good point, and I assume his conclusion applies to the other bad recordings you mention. 
Some address this with a Loki equalizer. Sometimes that works.