Put em back and returning. I figured that was on me and bought a replacement (another $150). It uses the same rubber and air pockets as the phone case so seems to protect well. Still, this does not leave me feeling confident about the towers. " Not sure what exactly that means, but now that my return window has ended, we will give it a try. The sound is clear and crisp, no complaints there. My conclusion is that this book is best for serious students of the subject. maddening but then it linked me to these filters 3 for less then the price of one how can you not take the gamble ???????! Good for kids. The touch is perfect and not too sensitive with my sweat band.