here is the company that licences its product to the names of cerwin vega, american audio, samson, b52 us series amps, audiophoney etc. There are quite a few name brands with enough confidence in the product to put their name on it, and sell it as their own.
This is where they are all coming from. Hpa has its own retail company, and its sister company manufactures all the product. Established in 2003, right when samson , stanton, cerwin vega etc all came out with their new amplifiers.