This Audio Research LS2 preamp uses one 6DJ8 tube. It is a hybrid tube/solid state design. It sounds super transparent and really lets an amplifier sound it's best. There are very positive reviews online. 5 sets of RCA inputs and one set balanced. 2 RCA outputs and 2 balanced. This model has no remote control. Clean condition, works great and sounds amazing. I will demonstrate it for you. Nice high end preamp from one of the best audio companies out there for $899 firm.