"Power Level" is not a good way to think about a frame's ability to propel a ball across the court at a given velocity. It's much better to think about "power source".
For example, a soft, heavy, thin/flat beam frame with a small head and average SW would be considered to be "low powered" by a typical low level, middle aged female rec player. They'd tap at the ball with their usual short and slowish swing and the ball would land on their side of the net. But a higher level, young male would find perfect controllable power. Meanwhile a mid level, middle aged male might find that frame has too much power because he can swing hard but lack the stroke quality to control the ball. Same frame but three different playing experiences: too little power, perfect power, and too much power.
Then consider a lighter, low SW, high stiffness frame with a huge head. That low level middle aged female player would say that frame has perfect power. The young high level male might say the frame provided too much power for his long, fast swing and balls would sail long. Same frame but different playing experiences.
So when thinking about a frame's power profile consider its power source. A stiff, fat beam frame with a huge head and a soft, thin beam, heavy frame can both provide the same "power level" but it's all about how the frame's construction influences stroke production and shot results relative to the player. A given frame can provide too little, too much, or perfect power depending on the player.
