I just received yesterday this upcoming 500 series preamp from Sonum, named H2O, for demo purposes
It's a discrete class A preamp, +69db of gain,
Mic/Line/Hi-z with combo front input connector,
three position switch, 48v, Pad and phase inv buttons,
led meter and overload led.
The preamp is meant to be fast and clean, not common in the 500 series.
It's an original design for what I know, that doesn't want to sound like or emulate any other pre.
I didn't have the time to play with it yet, but one interesting feature is that
the overload led has a 3 seconds "memory", I find that cool.
Anyway, the front panel is clean and clear, easy to read, gain knob is continuous, the knobs feel solid and the front switch has a nice "clack", feels very solid, both knobs have a rubber band around them for better grip
I'll play with it in the next days and see how does it sounds!
poor quality pictures of it