The Smart Amp is an automatic volume control unit. The Smart Amp acts as an unseen staff member, automatically adjusting the volume of any player as the surrounding room noise goes up and down. Volume of your Secret Sound speaker will stay consistent even as a brass band goes by! The Smart Amp “listens” to the room through a small remote microphone, and adjusts the player volume as needed to retain your setting. The Smart Amp also includes an internal 6-watt amplifier that is sufficient to power a Secret Sound speaker, making it the perfect system for unamplified computer audio output. Installation is easy, and you need only to provide speaker wire to connect the Smart Amp to your sound source and the remote microphone.