Originally Posted by ollinger
There's also the overlooked issue of resonant frequencies. If the shaft of a racquet and the stringbed deflect and then recoil at exactly the same frequency, a racquet will be particularly powerful.
excellent excellent point, and one that is almost always neglected, due to the lack of knowledge.
the resonance is important for both power and control..... if the shaft and the stringbed go out of wack, you can have hot/cold periods in the impact zone, giving unexpected results.