I'm having both of my HE-6/HE-500 headphones fully modded and hardwired by Whiplash Audio, so I no longer need this. It's BNIB, as it is fully burnt in. Works with both HE models (and possibly earlier models with the SMC RF connector).
Price includes US shipping and PP fees. Foreign countries add $10 extra USPS International surcharge. CONUS buyers are preferred.