This is very well respected third party power supply for Naim source components. It does the same job as a Naim XPS. It will suit most CD players and streamers with a multi-pin socket on the back. If you unsure about yours, please ask me before bidding. Naim believe that the power supply is just as important as the circuit design, hence most of their gear having power supply upgrade options such as this. Is it as good as a Naim XPS? I don't know. I can however say it made a big difference to my NDX and later powered my NDS very well. You won't find a Naim XPS for this money, and the Teddy XPS does not require re-capping. I have had this approx 8 years. It works perfectly and is in excellent condition. Two things to note: The power on LED does not light up any more. The casework runs warm, so it needs good ventilation.