The Focusrite Scarlett 18i20 is a super flexible, rack-mountable USB audio interface providing players with 18-in and 20-out, as its name would suggest. Users get eight natural-sounding combo inputs—two of which are easily accessible on the front, with six more on the back for keeping your instruments plugged in permanently without messy cords. Each of the eight inputs features the pristine- and natural-sounding Scarlett preamps the brand has been known for for over three decades. Plenty of headroom, clean gain, low-noise, minimal distortion, and dynamic range make this a go-to USB audio interface for every studio.