Darrell Calkins said this quote
“ The sweet spot is a term used by audiophiles and recording engineers to describe the focal point between two sources of sound, where an individual is fully capable of hearing the audio mix the way it was intended to be heard by the musicians. Different static methods exist to broaden the area of the sweet spot.Sound engineers also refer to the sweet spot of any sound-producing body that may be captured with a microphone. Every individual instrument and voice has its own sweet spot, the perfect location to place the microphone or microphones in order to obtain the best sound.In tennis, baseball, or cricket, a given swing will result in a more powerful impact if the ball strikes the racquet or bat on the sweet spot, where a combination of factors results in a maximum response for a given amount of effort. The actual sweet spot on a racquet or bat is a very small area, where dispersing vibrations and spin in multiple directions are canceled out, resulting in a perfect contact point between incoming and outgoing energies. ”