From the Boston Acoustics Blog Archives (circa 2011, updated 2013)
If you pick up an acoustic guitar (depending on the design of the neck) and play the top E-string on the top fret, you are playing B, at about 988 Hz. Some electrics even go a couple notes higher. A quick look at speaker specs will show a transition to the littlest driver, the tweeter, somewhere around 2,500 to 3,500 Hz, and the tweeter specializes in the highest frequency range, up to 20,000 Hz or higher.
Of course you would point out that a piccolo goes even higher than the guitar. How high? The top note on Continue reading