A:Answer The KICKER 44TCWC104 loaded subwoofer enclosure you are referencing does not have an integrated amplifier and does require a separate amplifier for proper operation. The KICKER CXA400.1, KEY500.1, PXA300.1 are a few suggestions. Visit the KICKER website to view these as well as may other options available. If you have further questions, please feel free to reach out to KICKER Technical Support. Email: support@kicker.com Phone: 405-624-8510, Mon-Fri, 8:00-5:00 Central time.