I just returned my UA Max pedal, I too was very excited about the 1176 and the LA 2A, plus you get a little bit of 610 Pre, I really tried to get the thing to perform without clipping out, I could get a sense of what it was capable of, alas it's not for Bass and mines a passive Bass too. There is a HPF switch on the app ( 1176 side only ) and this did help, but not enough.
I emailed UA many times for ideas and help, but the response wasn't that helpful, nothing I didn't know already. They did not acknowledge there was a problem though '' It works fine for us ''.
If they sort the problem out for Bass, then I'll buy another as it's a fantastic concept.