Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not Good, No Bass, CVE31 or Coby Jammerz r better

Coby makes good sounding earbuds... the CVE31 or the Jammerz anyway. I purchased these in February 2012. I bought them because I have numerous pairs of the CVE31's and the Jammerz and they sound great. I share them with my boys and anyone who needs a new pair of headphones. They're so inexpensive a person can easily do that. I bought these because I like the volume button on the cord but that's where the plus for them ends.I thought something was wrong with either my ears or the device. Nope. It's the CVE91's. They really suck as far as the sound goes. I did multiple switcharoo tests with different devices in comparison to the CVE31's and the Jammerz. The 31's and J's won every time with any device. Glad I only bought one pair of these. I'm serious about my music and the headphones or earbuds must work acceptable to me and these just didn't.No dis to those that they do work for, we all have different taste's.