The inputs; tape, aux1, aux2, etc. or however they are labeled on the back should be all the same as far as impedence. A phono preamp does only two things differently than these imputs-
RIAA curve correction which means it corrects for a very non flat frequency response that a cartridge produces from vinyl.
The phono preamp will also ampliflies the ever so tiny signal that the cartridge produces.
The end game is that an external phono amplifier may with RCA plugs go into your input of choice and work fine.
Any corrections to this by other members would be welcomed.
RIAA curve correction which means it corrects for a very non flat frequency response that a cartridge produces from vinyl.
The phono preamp will also ampliflies the ever so tiny signal that the cartridge produces.
The end game is that an external phono amplifier may with RCA plugs go into your input of choice and work fine.
Any corrections to this by other members would be welcomed.