The output level of a phono cartridge is much lower than "standard line level". A phono preamp is sometimes more accurately referred to as a pre-preamp.

There are also RIAA EQ curves applied in phono stages.

In short: You would hear something if you really cranked the volume, but it wouldn't be very good!

::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::