Ok so I am new to headphones and I own the above headphones. Have loved my MA900 since owning them but just got my Denon D2000 today and listeing to Frank sinatra, I did it my way. I straight away the Denon make them my MA900 sound rubbish!! I instantly notice I am hearing every single instrument as if am there!!, but when I put the Sonys on its all very flat and I am missing lots of instrument sounds I was hearing with the Denons. So my question is being new!! is this mostly down to the Denons being so much better? or are these the effects of closed headphones vs open? Confused as the MA900 get amazing reviews from members here and just shocked how rubbish they compare!