Ayre V-5xe pops off/Manley Shrimp

I agree with Mofi, it sounds like the Shrimp is leaking so DC which is tripping the Ayre's protection circuits. Maybe some caps need to be replaced in the Shrimp.

Interesting speculation.

I recall reading a somewhat energetic exchange of posts between Ralph (Atmasphere) and another member concerning whether a linestage or pre can leak DC. Ralph was quite adamant that should never happen. If the DC leakage speculation is correct, I guess the unexpected can sometimes occur.

What is particularly surprising here is that Manley makes very good gear and one would think this could never happen. I wonder if Manley pre/linestages use output caps. If so, I am puzzled by how DC could find its way to the output taps.

Have you tried new tubes in the pre? I had a bad tube in my Audio Research pre cause an amp to shut down.

Isn't the accepted wisdom to turn on the pre-amp first and then the amp?

Excellent point Truemaineiac.