This is an Avalon Design AD2055. It's a permanent fixture in my personal studio, primarily used for mastering. It's a truly wonderful piece of equipment that adds depth and brightness just by passing audio through it. Unfortunately, I'm selling it due to unforeseen circumstances. I'm a non-commercial, independent engineer based primarily in a certain area of Tokyo. As such, this equipment has been used less than ten times a year. I purchased it as a custom order from the authorized dealer, Miyaji Gakki. The condition is, of course, completely flawless. I believe it's rare to find an AD2055 in this condition. I hope to pass it on to someone who will continue to use it. Thank you very much.