My Grados are hand built in New York as a result build quality suffers slightly. I used my 20 year old Rotel BX870 pre amp to drive the headphones last night and there wasn't a problem, I wiggled the wire etc too and dosn't seem to be a break anywhere.
My old Goldring headphones snapped so I have been using my audiophile pair (the grados cost nearly £100) as a main set which is silly. I do have some old Berydrnamics but they sound a bit lifeless for TV. My Senhsier PX100 sound fine for TV and are extremely convertable but lead won't scretch to my amp so I may be an extension cable for it.
I seem to listening to more and more music so my amp seems to be left on a lot more, there is noise coming from my soundcard (only slightly) and if my amp is set to that channel I suspect its not heloping the cooling.
There is no obvious signs of dust inside the amp.
I think I have come to the conclusion that the amp is finding it too hard to drive the headphones.
My amp never cuts off with my brilliant Wharfdeale Diamond 9.1s.
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