All the web site info here: http://www.handbox.pl/R-400-MINI-HEAD-p142.html I love this Head, it’s simplistic in its controls and it does the job in spades. Set the levels flat and off you go.  Purchased a Roqsolid cover for it, even though it’s ‘painty’ finish looks and feels indestructible, I also put some rubber patches on its base to protect the bottom finish. Bought from Walshy on this ear forum, only reason for change is ordering the HB Valve jobby. May take a  part trade but cas