@PYP, thank you for your comment.
I will ask if I can extend the audition. The dealer seemed pretty flexible in that regard.
I'm not going to be too critical about the unit being new, because the dealer ordered the demo unit specifically because I requested a demonstration and they didn't have one in stock. As soon as it arrived, they contacted me and I picked it up.
Otherwise, as I was asking around about an MU1 demo, folks were telling me demos were not common with this component and people were buying them unheard. I was told this from owners and another dealer (who did say he could try and get me a demo unit).
Since you own a Tambaqui, and I also owned one for a short while, would you say the MU1 simply provides "more" of the Tambaqui sound, or does the MU1 change the Tambaqui's sound, and if so in what way(s)?