Recommended for those using Soundgenic (I-O DATA). Changing from the included AC adapter to this one significantly improved the sound quality. Purchased new on Yahoo Auctions. I am selling this because I reduced the number of Soundgenics I own from two to one. The usage period was 2-3 months (total storage period at home is about 2 years). Toroidal Transformer AC Adapter 12V5A for Digital Amplifiers, DACs, NAS, HUBs, etc. Audio Power Supply, Stabilized Power Supply, Linear Power Supply, Analog Power Supply For Soundgenic (I-O DATA) - Analog Linear Power Supply - Equipped with a Toroidal Transformer Specifications Input Voltage: AC100V 50/60Hz Input Terminal: AC Inlet 3P DC Output Plug: Specifications changed for Soundgenic (I-O DATA) Output Cable: Approximately 0.9 meters Output Voltage/Current: 12V/5A Case Dimensions: Height 5cm, Width 12.5cm, Depth 20cm (Height includes 7mm rubber feet) No switch Weight: Approximately 1.6Kg *Although a power cable is not originally included, a general one will be provided for power-on confirmation. It is recommended to change to a high-quality one for better sound quality.