Ayre V-5xe pops off/Manley 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.

Thanks guys for all the ideas. Here is what is happening now/update. First I power up the pre first. The amp was boxed for six months or so. I have had the amp in stand by mode for 3 days now and the very faint hum i heard is gone and when I power up the amp is stays on 99% of the time. If it does pop off and I turn the amp back on it stays on and sounds wonderful. Maybe I will call Manley and see what they have to say. Thanks again

Bill