Hasse, the upgrades to the T3 SE are new Synergistic made G07 wall plug and IEC. The G07 plugs are a great improvement in Dynamics, clarity, resolution and impact. Also, new is the upgraded active shield. Now you can choose your active shield filter of choice. The older cables the filter was built in and was not changeable and if it went dead the whole cable had to be sent back to Synergistic. Now the filter is a plug in module and if it goes dead Synergistic just sends you a new one. Also, there are 3 flavors of plugs a Black, Silver and Gray. You select between three different circuits- Black (warm and rich), Grey (hybrid of both Silver and Black circuits with positive attributes of both- these are the circuits we would have selected were the circuits to remain built into the cable) and a Silver Circuit (open, airy, detailed and hugely holographic).