From designer Christian Schwartz on christianschwartz.com:
In school, I often used Matthew Carter’s Bell Centennial, originally designed for telephone directories, as a display face. I liked the striking and unique forms created by the “ink traps”, spaces carved out where strokes converged that would later be filled in by the expansion of ink on paper. Without these notches, forms would fill in to the point of illegibility. While I was working at Font Bureau, we had a lot of newspaper projects come through the studio, and I got some hands-on experience with the specific demands of printing small type on absorbent paper. Amplitude is a reaction to these two factors, and is essentially an agate face drawn for display.