Hey guys, we don't monitor this forum every day!
This week we're super busy with the preparation of S-9 launch etc.
Next two weeks we will be travelling ...
If you want to seek help from other forum members as the problem might be related to your set up with TACT or whatever that we're not familiar with, that's perfectly fine.
But if sincerely want us to take a look at your problem, you should submit your question to
[email protected]. As one member pointed out, that's the logical way to go about seeking help. Sure, if we fail to response and you want to embarrass us, you can post it here

Now back to your problem:
If i raise the output level of preamp (Tact 2.0) all go OK. I have to send the units to my dealer for SE upgrade in September Razz..but..any suggest?
Your description of the problem is vague.
Could the problem be that Tact 2.0 is sending out noise to Ref 9 until you raise the volume of the TAct 2.0? Then the title should be "ARRR.... only a Hiss from my TACT ...".

You should provide more quantitative description.
What is the output level that you have to raise to be ok?
If you raise it and then lower it, what happen?
Does it happen on one amp or both amps?
Did you do anything to your setup for the past 2 days before this happen?
Where did you get your Ref 9 ? We don't have a record of it

.