abstract:IS-54 and IS-136 are second-generation (2G) mobile phone systems, known as Digital AMPS (D-AMPS). It was once prevalent throughout the Americas, particularly in the United States and Canada in the 1990s.
Twoofthe mostimportantfeatures of the Shadow, thatOTHERS can't claim with their digitalvolume control amps, is that the SHADOW has noinput&outputCAPACITORSintheSIGNALPATH.
Well, now the Luddites have a new enemy of the state to vilify, the Variax Acoustic 700 guitar made by a company called Line 6, which for years now has been briskly selling digital modeling amplifiers that mimic the sonic characteristics of venerable guitar amps.