The Studio 24 was presented at NAMM 2018 and Studio 24c at NAMM 2019.
No big changes apparently in the inside, but I notice a difference in the inst/line gain knobs:
- Studio 24 (-15 to 35 dB)
- Studio 24c (0 to 50 dB)
Just a reply to this guys answer, he's wrong. They BOTH have the same gain.