the output to speakers has too much amplitude to feed stereo inputs. As well, mismatched impedance will mess with frequency response. You'd be better off adapting the output of your audio device in some manner. The trick will be fabricating good shielding to block noise...especially 60 hz hum...from overpowering the signal from the music device. I'd say, however, have at it. Experimenting is fun and and a good way to learn.