A compressor system for natural gas comprising: - a driver machine comprising an output rotary member, - a gearbox (GB, EGB) comprising an input rotary member and an output rotary member, and having a gear ratio greater than one thus increasing the rotation speed from input to output, and - a centrifugal compressor for compressing natural gas, the centrifugal compressor having an input rotary member; wherein the output rotary member of said driver machine is coupled to the input rotary member of said gearbox, and wherein the output rotary member of said gearbox is coupled to the input rotary member of said centrifugal compressor; and comprising further another centrifugal compressor for compressing natural gas, and wherein said centrifugal compressor and said another centrifugal compressor are connected in train configuration to the output rotary member of said driver machine; characterized by the centrifugal compressor having an output rotary member connected to an input rotary member of another gearbox (GB, EGB), the another gearbox (GB, EGB) having an output rotary member connected to an input rotary member of the another centrifugal compressor; and one of the gearboxes being an epicyclic gearbox. - a driver machine comprising an output rotary member, - a gearbox (GB, EGB) comprising an input rotary member and an output rotary member, and having a gear ratio greater than one thus increasing the rotation speed from input to output, and - a centrifugal compressor for compressing natural gas, the centrifugal compressor having an input rotary member; wherein the output rotary member of said driver machine is coupled to the input rotary member of said gearbox, and wherein the output rotary member of said gearbox is coupled to the input rotary member of said centrifugal compressor; and comprising further another centrifugal compressor for compressing natural gas, and wherein said centrifugal compressor and said another centrifugal compressor are connected in train configuration to the output rotary member of said driver machine; characterized by the centrifugal compressor having an output rotary member connected to an input rotary member of another gearbox (GB, EGB), the another gearbox (GB, EGB) having an output rotary member connected to an input rotary member of the another centrifugal compressor; and one of the gearboxes being an epicyclic gearbox. wherein the output rotary member of said driver machine is coupled to the input rotary member of said gearbox, and wherein the output rotary member of said gearbox is coupled to the input rotary member of said centrifugal compressor; and comprising further another centrifugal compressor for compressing natural gas, and wherein said centrifugal compressor and said another centrifugal compressor are connected in train configuration to the output rotary member of said driver machine; characterized by the centrifugal compressor having an output rotary member connected to an input rotary member of another gearbox (GB, EGB), the another gearbox (GB, EGB) having an output rotary member connected to an input rotary member of the another centrifugal compressor; and one of the gearboxes being an epicyclic gearbox.