This Firmware must be used to upgrade CT-5300 units that have a Serial Number starting with "2090". 

Do NOT use this Firmware Update on CT-5300 units that have a Serial NUmber that starts with "2092".

For CT-5300 units with a Serial Number that starts with "2092" and for all CA-5300, please find the separate Update Archive on our website https://classeaudio.com
