Pfantone PRE600 Phono Preamp Allows you to replace a crystal or ceramic stereo cartridge with a better quality magnetic stereo cartridge while using the original stereo amplifier supplied with your turntable The use of this pre-amplifier in conjunction with a magnetic cartridge will give you CD quality sound out of your vintage turntable Improved circuitry and filtering in the power supply results in lower hum while maintaining an isolated ground loop