My girlfriend gave me a pair of over-the-ear headphones for Christmas, They're small, but the sound quality is incredible, almost perfect! My parents got me a different pair of headphones (over-the-ear as well), and they're a lot bigger and more comfortable, but the sound quality's not as good as the other. Looking at the specifications, the small one (Stanton DJ Pro 60) has a frequency response of 3-28000 Hz, and the other pair (Aiwa HP-X223) has a FR of 5-25000 Hz. The difference is VERY noticeable, particularly when it comes to bass. Is the difference in frequency response that big a deal? If so, why?