Everything has a noise floor, but for the most part, it should not be relevant when you are listening from a normal distance from your speakers, unless your phono pre-amp doesn't have enuf gain, or it also has a highish noise floor.
My medium output Benz Glider in my ARC SP10 displays a buzz and random noise that sets in at about the loudest I would ever listen to it, but without a stylus in a groove, it is audible. With a high output Grado MM cartridge it remains dead quiet intil the last click or two of the VC which is the noise floor of the phono stage. I haven't tried it, but I would guess that the Grado's noise floor would reveal itself in a phono stage with less gain than my ARC.
FWIW.
My medium output Benz Glider in my ARC SP10 displays a buzz and random noise that sets in at about the loudest I would ever listen to it, but without a stylus in a groove, it is audible. With a high output Grado MM cartridge it remains dead quiet intil the last click or two of the VC which is the noise floor of the phono stage. I haven't tried it, but I would guess that the Grado's noise floor would reveal itself in a phono stage with less gain than my ARC.
FWIW.