THE most sonically dissappointing (lp) you own of great music?

Hi Spencer, I haven't found a great copy of Who's Next(the MCA double LP  reissue with the live at the Vic is good except for surface noise), but most from the Decca, Track, and MCA periods sound good to great: Sell Out, Tommy, Leeds, By Numbers, Who Are You(particularly the half-speed master version). Nothing amiss with a US Track Quadrophenia either.    

Okay, any Red Hot Chili Peppers album sonically sucks because the mastering with those god awful limiters squash all dynamic life out of otherwise good music. How’s that?  And there are countless examples of death by the loudness wars.  Destroy those digital limiting amps!!!  Now!

Here's the Dynamic Range Database website link. It's surprising just how extensive the whole effort to overly compress music has been.

http://dr.loudness-war.info

The first couple of Jackson Browne LPs.

Madonna Bed Time Stories. Very very messy bass there. Extremely collectible vinyl tho.
"The Smiths" joins for poor mastering.