FM is 50-15kHz. AM is around a telephone land line. Open E on a 4 string bass guitar is around 40Hz.
Unless you are a 16 yr old female, try a test tone CD, like the Rives Audio or equivalent, and see if you *really have anything going on above around 10-15kHz. It will really open your eyes(ears).
Unless you are a 16 yr old female, try a test tone CD, like the Rives Audio or equivalent, and see if you *really have anything going on above around 10-15kHz. It will really open your eyes(ears).