It should go thru the SSP input since the tape loop is a fixed gain that would probably blow up your speakers. You would have no volume control thru the tape loop. You would have to run a seperate output from your phono into the NAD as well as the SF. You could try a 1 to 2 adaptor and see if it interferes with your sound quality. If it does you would simply run the phono into the preamp that you are using at the time. Your other option would be to use an equalizer into the SF. Since this is basically only for older records with sonic issues it would probably work great. The EQ would run thru the tape loop of the SF.