I love good sounding earphones so I got a pair of Etymotic ER6i. For the longest time I thought those earphones had NO bass, non at all when used with any of my iPods (5th gen. Nano, 7th gen. Classic, 3rd gen. Touch, & iPhone 3GS). IT'S NOT the Etymotic earphones! It's the crappy iPods! I plugged the buds into my 13" MBP and WOW! Sounds like BIG speakers in my ears. Bass is full and controlled. The highs & mids are PERFECT, no listening fatigue at all. I just want to turn it up! I then compared the MBP to my white Macbook. The Pro wins. Anyone know how I could make my iPods sound as good as my MBP? All music on iPod & MacBook Pro are in AIFF.