Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Goodbye engine whine!

When I would plug both power and audio from my Droid X into my car (Scion TC) I would get a high pitched whine from the engine through the speakers. If I unplugged the power, the whine would disappear. I got this and the whine completely went away! It worked great! I haven't yet noticed any sound degradation but even if there was a tiny bit, it sounds 100% better than that annoying whine I was hearing before. For $10 you can't go wrong. Buy this!