Charles - Tom is correct, only the loaner is for $400 (with full factory warranty). The special pricing of $500 is only for a limited time, as Grant Fidelity (importer) and Shengya (OEM) decided to discount most of the product line to encourage exposure to their products. Shengya has been making hybrid amps for approximately 15 years, and as Tom mentioned, supplying several other high end companies with their products. I would have bought the loaner in a second, except I have too many amps currently. I had the amp playing in my second system for a few weeks, and really enjoy the sound.