tube pre amp and Krell FPB 600

I always get a thump sound over the speakers when I turn my amp off, it's really alot of power, seems normal to me.

CT0517, I do have the owner's manual, I have read exactly what you have specified many times, it is a whole page, I do not believe it would hurt nothing to do the power up and power down scheme that Salectric has told me, I never thought of it, makes sence to me,I'm going to do it, The tube/solid state digital source I use straight to my amp in no way could spike anything following Salectric's advice, I have always used all solid state, likly that may be the reason I never thought of doing a procedure for on power and off power of Tubes mixed with sold state audio equipment.

Of course, Krell could have just warned that the power amp should always be turned on after the preamp has warmed up and turned off before the preamp. This simple procedure would also solve the thump problem, but then who wants to count on their customers actually following this advice.
This is a bit of info I can certainly use for my Krell 700cx, thankyou Salectric.

Roger Modjeski RM9 and RM 10 tube amps?, mmmm can you tell me more about them?, I have never heard of this!, are they U.S.A. branded, what's the story?

Hi Knghifi, yes, I am going to do the power up and power down that salectric has specified in the above post, interesting, you said that by doing this, I may not get that turn off thump with My krell 700cx that will be back from krell today with up-graded power supplies and along with complete new and improved caps that they installed earlier this year that was not the stock caps that was in the amp when manufactured,I am going to do what you and all have said about power up and down scheme, Thankyou Knghifi.

HI Knghifi, Got my Krell 700cx amp back yesterday from Krell, Talking about holy fricken cow!, this amp sounds incredible with the modds we paid dearly for that appears to be worth every cent!, BTW, I did the power up and power down as specified, no matter what, I still get the not loud at all power thump over the speakers when I turn amp off at the rear panel breaker, I see in the post above this is normal,BTW, Patrick Bresnahan of Krell know's his product very well and then some, A very talented musician too!, we have become good friends over the course of the last 3 years, I talked to him yesterday, I recommend, that if you need any thing done at Krell, Patrick is the Man!, KNGhifi, I will try muting as you have said, that is informative, never tried that,I just turn the volume completly down, is that the same thing?, Oh, up packing the amp and doing re-set up was an incredible feat to say the least, you know, my amp does weigh 180 pounds, took hours, and a neighbor, plus the wife, whom took a vacation day from work to do all this, good thing she did, she was a huge help, I appreciate her, good woman to put up with this insanity.