Great piece of gear for any studio
I got the chance to use this unit while I was an intern at a recording studio which recently added the STC-8 to their rack. Testing it mainly for mastering my own electronic tracks, you can use this unit incorrectly and not be able to tell... it has the ability to add large amounts of clean gain with no distortion. IMO, the layout of the preset knob is the most confusing thing about the STC-8 to understand, just consult the manual and you will be able to choose your desired preset. Using the STC-8 on Variable mode while mastering a track adds a noticeable amount of gain over the presets (C preset in this case). The KI mode does add that vintage warmth, but I wouldn't jump to use it on every track as it noticeably cuts the high end. If i had the cash, I'd be adding an STC-8 to my studio immediately.