[Philimon]

If you're someone, like me who jumped on with the t5050, the release of the mkIV doesn't irk me in the slightest.

For sure. Should be interesting comparison.

Pre-ordered from Audio46, Paypal denotes as “pending until ___ processes order”.

 

[ThEvil0nE]

Some USA vendors have pre-order available now but no eta as of yet.

https://www.bhphotovideo.com/c/prod...laner_magnetic_semi_open_back_headphones.html
B&H states charge at checkout.

https://audio46.com/products/fostex-t50rpmk4-semi-open-back-headphones
Audio46 says will not be charged until item is in stock.

https://www.altomusic.com/products/fostex
Alto Music has the T50RPmk4 on pre-order too, it's where I got my second pair of T5050 via their Amazon store.