Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worst buy I ever made

When the unit is turned off, there is a lot of noise comingfrom the speakers, as long as it is plugged in the wall. Hadto disconnect the system from the electric plug at night time- otherwise I could not fall asleep ;)Then, I tried to connect my guitar effects to the RCA inputjacks. However, I could barely hear any sound coming throughthe speackers, even if I turn it all the way up. I'veused the same setup to connect my guitar effects to my stereo,and no problem there, so I know it's this unit.Wanted to return this [...] the next day, but could not findmy receipt. Shucks. Now I've taked the unit to the office,assuming the noise would be less annoying because of our officeair vents. Nope. Noise is so bad, I have to unplug the systemif I don't want to listen to music.For $50, I'm sure this is a very very bad buy. For $50,any other alternative is most likely a better buy that this.Beware.And if you choose to go against this advaice, make sure youknow where you keep your receipt.