Ortofon GT STYLUS For GT CartridgeGT was developed by Ortofon in close co operation with SWS Audio GmbH. The cartridge was named "Great and Tough" and was based on the construction of the well known Ortofon Series 500 design mend for standard half inch mounting in a black housing with white printing. The vital parts in the GT are based on a very robust and reliable parts used in Scratch. Further, during development of GT, efforts were also concentrated on supplying a very high output