Your source for audio, electronics, and repair knowledge
With the many manufactures of capacitors these days you are bound to run across some part series designated for “Audio use” with little other info available to explain for what audio purpose specifically they are intended for and what makes them so great.
Due to the large gain of most audio amps, they can have significant current consumption. Regardless if the topology is class A, AB, or D...
Common mode rejection ratio is the ability for a device to reject or suppress “common mode noise” -that is noise that is common(identical) to both differential input channels. Let’s take an amp for example with an audio signal at its differential(inverting and non inverting) inputs.
In most amplifier designs you will be tasked with choosing an input filtering(coupling) capacitor value. This is the capacitor that goes on the input stage of an amp and filters DC bias from the audio signal.