Yes, heard they are easy to drive :)
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The Grados aren't the most neutral things going but they're a lot of fun. They're like Royd speakers in many ways - definitely a certain colour to them, but they get more right, as far as music is concerned, than stuff which costs many times their price.
I've also got a pair of Sennheiser HD650's which haven't been used for ages - they're just sat in their box upstairs. Not used them since I sold my Slee Solo phones amp a few years ago.
Amazing photo Richard - you've managed to get selective wide-angle distortion on it :D