so, i received my video music in the mail. works great. the only thing is, my receiver on my stereo doesn't have a line out so i'm left hooking it up to the subwoofer out, which works, but somewhat dampens the amount of output compared if it were hooked up to a true "line out/tape out" setup on my stereo.
i found these at radio shack. 
is it ok to hook these up to my left/right speaker connections and run them as the input for the video music? my concern is that they're post amp, not preamp, so would the signal to the video music damage the video music if the volume were turned up loud on the stereo (increasing the signal to the video music)?