I did a search for those IR headphones that were available for the PX-4 (I have too many cables for my night-time sitting-at-my-desk sessions) and came across a Japanese blog about an apparent PX-5. So then I searched for "korg px-5" and found
YouTube videos,
Japanese blogs, and
Dutch websites dating back to last year. With all of this foreign information, I figured the PX-5 never made it to America, but apparently,
this guy, who lives in Boulder, Colorado, gigs with one, and that's lead me to wonder... WHERE CAN I GET MINE?!