Apple claims that they have " custom speakers utilize every cubic millimetre of available space to provide high-fidelity sound with wide dynamic range and better base response." Sounds great (no pun intended) but how are they really? I couldn't find a thread on the rMBP speakers, and I was just wondering how loud and clear they were? I've tried them at the loud Apple store and it was pretty loud to hear movie trailers on YouTube. What is your experience on the speakers? Were they better than the non retina?