dew try this method.
1. take a stereo line out from porta into stereo line in of a cassette deck
(or some folks use a stereo high quality vhs hi fi or even a mini disc
recorder, or now there are consumer dvd/cd recorders on the market).
2. put a blank cassette in the cassette deck then start it recording.
now hit PLAY on the porta. the song mix should come out of the porta and be recorded on the cassette deck. you can plug phones into the cassette deck before and do a trial run to make sure.
now rewind on the cassette deck to song start and hit play on the cassette deck and you should hear your mix on the cassette deck.
now just hook up the cass dek to your regular home stereo.
i hope this is what you wanted.
peace.