They're probably running it un-amped. But even when I tried it un-amped with my tablet, the bass was still present. The sound is somewhat flat, but that doesn't mean it's boring. Like I said, I own HD203's which have better punch than the 202's, but the 280's pump out even tighter bass...

How about a pair of HD-280's? I've owned a pair and loved them, the bass is well controlled (and plentiful) and the mids and high's are more abundant and less "veiled" (than the HD203's). I don't own a pair of HD202's but I do have a pair of HD203's (slightly brighter, bass not as boomy, similar...