Rarely available Lexicon 512 5 channel amp, 120 wpc into 8 ohms, fully tested and fully functional. Balanced and unbalanced inputs.This unit came to me three years ago with two blown channels, 3 and 4. There are two pairs of output power transistors per stereo channel. On channel 3, both pairs were shorted/ on channel 4, one pair was shorted. The identical power transistors were no longer available, but I found replacements which, from what I remember, were equivalent or better. The replacements used were the MJ21194G for the SJ6521A, and the MJ21193G for the SJ6522A. Additionally, 4 capacitors per amp board were replaced, with good quality caps, because it was now my amp. This was used for two years, then stored in a temp controlled smoke free room, and brought out now for several run in hours per channel prior to letting it go. The circuit board shows 9BST on it, likely the Bryston version 5.0 board.