Atomic SUMTHANG tube summing mixer from InnerTube Audio in excellent condition. I’m only selling because I'm simplifying my mix setup. It has been used in a smoke-free mixing environment. The unit has input transfers on every channel along with tubes and two beefy output transformers on the mix bus giving it incredible detail, depth, width, harmonic richness, and analog glue. Perfect for hybrid workflows. Includes new power supply.

From the manufacturer:

Old-school analog crustaceans that we are, we at InnerTube recognize the productivity that digital audio workstations (like Digidesign Pro Tools and others) have made possible. Running the outputs through a high-quality mixing console has become a favorite best-of-both worlds solution for those who want digital flexibility and analog sound quality. But what if you dont have a large-format console, or prefer to mix inside the box?? Well, we thought up the Sumthang just for you.