This unit came from Sight and Sound and was upgraded by Rogue Audio and have all the paperwork showing the work done to it. The Metis preamp by itself before it became the Magnum was spectacular and got rave reviews, the Magnum is much more robust and has great detail to it, one of the better tube pre/amps I have hand it a long time. It will come 3 sets of Tubes the 2 pairs have not been used. Hate to see this go, but too much equipment and not enough time to enjoy it. If you have any questions don't hesitate to call or e-mail me. Unit will come shipped double boxed and insured and I will throw in free shipping to the lower 48 States only if offer is met. Thanks for looking!