Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very disappointed with the bass and volume levels

I spent considerable time reading reviews and searching for an upgraded pair of earpuds for my new 80GB fifth gen iPod. After doing my due diligence, I settled on the Shure E2c-n.I spent several minutes changing the various sizes to get the best fit then plugged them into my iPod to give 'em a whirl. I was very disappointed when I hit play and heard very little bass and an overall lesser volume over my stock Apple buds. I fiddled with other sizes of covers, without success, and swapped the Shure with the Apple stock ones several times with several different genres of music and continued to be disappointed. The one advantage the Shure offered was they did block out external noice to a much greater degree over the stock buds but this was a minimal positive compared to the lower overall volume and reduced sound quality.I'll be returning these tomorrow. :-(