I have a Moscode 300, with most of the G. Kaye mods, and most recently, had several of the electrolytics upgraded and replaced by Gary Dodd. I have used it primarily on my LS9s- which are considerably more power hungry than your LS6s. I have been very please with the combination when used in tandem with the Dodd battery pre and a Buffalo Sabre Dac. However, I had been talking to Gary about a having him build a power amp for me when he had a health issue. If you are interested in the Moscode, I'll let you have a very fair price.