The Stem, Tree Audio’s latest products, is 8x2 channels of all discrete, Class A Inward Connections amplifiers. It's a standalone unit that can be used with any console or just as a mixer; no need to use it with a Roots console.
The Branch- It's a standalone channel strip version of the Roots console, featuring all of the same controls as The Roots, as well as an internal regulated tube power supply. So if all you need is a single channel or two, this is it. It's simple to operate and has an amazing sound.