Sanus EcoSystem 3U High Volume Fan Home Theatre Speakers giving you the ability to giving you the ability to use a single subwoofer with multiple system in the same room Two over sized high capacity toroidal core power transformers are employed in the UD 505 SANUS Component Series CAFH01 3U high volume fan easily connects to the CAPT01 MultiVolt Power Supply to help create the SANUS EcoSystem™ a fully customizable accessory that serves as the single power source for all low voltage equipment in an AV rack This component is automatically activated by the thermostat kit (included with the MultiVolt Power Supply) when the rack exceeds 85 degrees and turns off when the rack goes below 75 degrees