Purchased 12/10 direct from the mfr, used ~2.5 years until my system changed. This handsome device with a pretty blue light works flawlessly & does exactly what the manufacturer claims. Here's a relatively recent review: http://hometheaterhifi.com/reviews/audio-accessory/accessory-misc/ade-24-1-analog-digital-enhancer/. I no longer have the original box, but will pack it securely w/print of the pdf manual. Selling for $125, which includes Paypal and shipping w/in CONUS.