Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Cheap and Nasty

These headphones sound awful. There is all sorts of hype on the packaging about how they contain the latest technology - they even tout that the headphone lead uses oxygen free copper! What a con. All the other bad reviews are correct in saying that these headphones are low grade boom boxes with a muffled midband and virtually no treble. Give them a good listen before you part with the cash