Crank the Bar Scene up to 11 With the RiffMaster Pro(TM) Amplifier System for Guitar-Based Music Videogames From ArtGuitar, LLC and Peavey Electronics Corp. NIWOT, CO--(Marketwire - December 18, 2007) - ArtGuitar®, a leading designer of custom graphics for electric and acoustic guitars, along with Peavey® Electronics, announced today plans to...