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
It is the b&w speakers holding you back they are volume and dynamic limited because of crossover and driver coil saturation you need to switch to a different speaker and your system will come alive.
I'm done with these forums. I don't ever see respectful discussion, but rather prideful lunacy. Good luck filtering through all the BS. My parting gift - https://forum.audiogon.com/discussions/3-ingredients-to-a-healthy-audio-community
You didn’t mention which format. I have a pressing of Led Zeppelin 2 that sounds as you described. I have LZ 2 on cd and it sounds nice. There may have been a weak run of vinyl at one time. Just my personal observations. I’m pretty much a vinyl loyalist so the album really was a bummer. 
@iseland, +1...but one runs the risk of a listening space starting to look like a dealers' showroom....or like you 'do review'....;)
thank you to everyone who responded. With due respect, I do wish that some posters read the whole post. Problem is that some music sounds great as it should but some does not and the question is, among other things, why such difference. I am now investigating the source and will try cd, records, and alternative streaming application. I tried another set of speakers -- the same result, some music sounds great but not LZ. I did try LZ first album (tidal, deluxe edition) and it sounded OK. Actually, quite good.