Gain Cards and Gain Clones, how do they different


Sorry if the question is too simple, or is gonna leave me in a "uh duh" situation.
But I've read about 47 Labs Gain Cards" and there have been "gain clones" in the auctions.
What are they? How do they differ from "standard amps" to the point that they are called something different?
Any benefits to the design over "amps" and are the "clone" type just "mid fi"?
Subjectivitywelcome.
Thanks
spiro

Showing 2 responses by spiro

Well, it says there are no responses, but above this that I am writing is a brief and helpful statement "clones are copies of the original gain card".
So how do Gain Cards differ from Amps then?
Thanks
thanks! Tough loads... meaning under 2 ohm at places, or is it a matter of the db rating?