I am selling my lightly used Polk sub. I purchased this almost 2 years ago. I paid $350.00. I am selling because I have since moved to a smaller residence. I can no longer utilize such a speaker. It has been boxed up in storage since this picture which was taken about 6 months ago. It has had very little use. The sub sounds great. It is a sealed enclosure and sounds great for music and does well in a medium sized room for home theater use. Frequency response is 32hz-225hz. 150 watt amplifier.