Orpheus, we have had the bi-amp discussion going on these things for a while now. It may not be feasible, but it certainly intrigues me. The thing that would make it possible is that these phones have dual drivers (LF and HF) on each side. I would have to get at their internal x-over and rewire from there. Considering the price of these cans, I doubt that I would do it really. Still, fun to ponder.
Old Pa, interesting point. I have no clue who makes them. I've never seen anything similar. I thought that Panasonic was part of Matsu****a, but I don't know where the design and engineering happens.
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