hi , i recently got a pair of 7506s from a charity shop really cheaply, they were very worn, the pads have had it so I have ordered new ones from sony. the silver studio monitor lettering on the headband is only just visible and there is no silver left. the cups are a bit loose and don't seem to grip together. they look legitimate, they say made in thailand and look to be of sturdy construction otherwise. I tried them with the old pads and all I could hear was highs and a little mid but no bass. hoping these are not fakes.