I've got a "MINT" ArcAudio 4050 CXL w/original birthsheet 7/03 sz, 109, 111, 108, 110 at 2ohm, original owner sent it to Arc to have it checked-out because it had sat in his closet for almost 5yrs, and asked if they could tweek-it a little, New birth-sheet, /09 shows @ a 10per gain on each channel ! On a scale of 1-10, this is a 11 ! Not even a scrath on the mounting feet ! http://www.arcaudio.com/archives/cxl-man.pdf $333 shipped, if this is of interest to you send a email address and I'll send some pics, LMK, RBU