Instruct: Classify a given review into positive or negative sentiment.
Query: didn't function properly

Tried this device on the DVX-100B, and no matter how high I would adjust the gains, it just picked up very faint wispers of sound. At this point I thought maybe the problem was in the XLR adapter I used, but when plugged into my computer and laptop, I got the same results. Device was on, used 2 different new batteries... Nothing. I've used various mics before like Azden, so I think I have a decent understanding on how these should perform, and the pickup on these mics are almost nil.