Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very High Quality Subwoofer

The Cerwin Vega CLS-12S Powered Sub is a great subwoofer. I needed a good sub to round out my home theater and for music. Cerwin Vega has been around for a long time and has always been known for producing a lot of bass. The sub is very heavy and well constructed. The amp is the same brand that most of the high end sub manufacturers use. It has lots of power and is very adjustable to room and listen environments.