It's not an accident that Amazon stuck the speakers in crooked. The Kindle's primary purpose is not to deliver e-books quickly into your lap, but to distribute a series of audio buoys for Amazon's own Owl Delivery Network. The tilt of the speakers matches the
Owl's unique physiology, for maximum precision. The supposedly useless mike sends home the "whooo" of couriers-in-field for instant tracking.
Don't go attributing to science something that's easily explained as a wizard's work.