@sgordon1 Did you have Puron's or another brand of plug in conditioner before the Main and if so how do you contrast them? I'm particularly interested in your experience if vs the Puron.
Main Stream, from Vera-fi Audio
Their newest product, called “Main Stream” might be their most powerful yet. It is a plug-in filter that increases the blackness of one’s system by eliminating interference from other sources in your house. This description is admittedly inadequate, and many products talk about blackness in attempts to get closer to sounds captured in real space in which they were made. I can’t think of any other product that improves recorded music as dramatically as Main Stream. If you have other Vera-fi products, think of Main Stream as laying the foundation for their many contributions. An amazing accomplishment, in my opinion, that must be tried, to be believed.