Fully upgraded Devialet 250 which included 88 improvements. These included: Next generation power supply. Modified digital amplification card. Improved phono stage. Advanced digital inputs. Three times more powerful main processor. New connection board. Very low latency asynchronous USB 2.0 port. Asynchronous Ethernet. 3.5mm optical minijack . RS232 connection technology and high-speed Trigger. SAM compatability. This unit has the current 9.01 firmware loaded. I will also load your speakers onto the SD card so that the unit is ready to play as long as your speakers are on the SAM compatibility list.