Slew

“Slew” refers to how quickly a circuit’s output voltage can change; it’s usually expressed in volts per microsecond. When it comes to pro audio equipment, this spec is usually referred to as the slew rate and is most commonly associated with amplifiers, but in fact applies to many types of gear. In amplifiers, a low slew rate “softens” the attack of a signal, “smearing” transients and sounding “mushy.” Since high frequencies change in amplitude the fastest, this is where slew rate is most critical. An amp with a higher slew rate will sound “tighter” and more dynamic to our ears.