The use of negative feedback has been a point of controversy since the Seventies in amplifier design. On this page we'll discuss its pros and cons and address some of the myths and misconceptions surrounding its use. My general philosophy is that when it is used properly, it vastly improves an amplifier, both sonically and in measurement. Unfortunately, there are those who do not know how to use it properly, even though this is not rocket science. Negative feedback has gotten a bad rap from such designs. It is certainly possible to design a horrible-sounding amplifier with negative feedback, but that is also so with no-feedback designs. Indeed, often the well-intentioned approaches that some people use to reduce negative feedback and/or open-loop bandwidth sometimes compromise sonics and performance. In other cases, the mis-use of NFB can lead to ceratin forms of amplifier mis-behavior under certain conditions, an example being bursts of parasitic oscillation under conditions that were never tested on the bench.