Powered subwoofer for MSP speakers, 180 watts, 10 Inch woofer
Single 18 Inch subwoofer
Powered subwoofer, 800 watts, 15 Inch woofer
2.1 Studio Speaker System. Magnetiy Shielded Satellites. Base Reflex Subwoofer. 12W RMS/24W Peak Power. Accepted up to 15 days after receipt. If after that time, you need to the manufacturer for tech support/an exchange 866-890-7115.