Glossary → Firing frequency
Firing frequency.
kHz, the number of drops a nozzle can fire per second
How many times a second a printhead nozzle can eject a drop, quoted in kilohertz. With resolution it sets the real speed ceiling of a head: dpi says how dense the dots are, firing frequency says how fast they can arrive, and a spec sheet quoting only dpi is showing half the story. Push a head past its rated frequency and drop size and placement go first.