Hi Ned, hope things are well on your end. While i've only seen pictures of these units, my guess is that you would either feed the input of the Perreaux from the output of a tape loop and then have the output of the Perreaux feed the input of the tape loop OR the line level output signal of the preamp would feed the input of the Perreaux while the output of the Perreaux would feed the power amp. I am strictly guessing here and probably haven't helped you any more than you could have guessed, but it might be reassuring to know that your guesses were as good as anyone else's : ) Sean
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