Hi there,
I’m lucky Slipsik 6 user. On Lejonklou website I found info „All units, even the first one, can be upgraded to the latest”
Anyone knows how it works?
Thanks for help!

Hi Olek and welcome to the forum!

Slipsik's before version 7 will need to be returned to my lab in Uppsala, Sweden, or in North America to Nokturne Audio in Michigan for an upgrade to version 7.1.