05-01-2012, 03:14 AM
It is best to know what are their exact Frequency Response. Shannon has specifically noted that it should be capable of at least 20khz if you are going to play the Ultrasonic Version.
"Nothing in the world can take the place of Persistence. Talent will not; nothing is more common than unsuccessful men with talent. Genius will not; unrewarded genius is almost a proverb. Education will not; the world is full of educated derelicts. Persistence and determination alone are omnipotent."
