Hi, sorry for not explaining more and on my part. Sometimes when the input sensitivity between amp and pre-amp is not equal the products won't act in sync.
I have a friend who purchased and tried several pre-amps with his modified ss amps. I was wondering why when he tried Edge, Linear, my previous Bel Canto Pre3 pre-amp he was not getting the results he wanted. I felt for him and told him what I was thinking and he later found something; however he almost gave up in anger and frustration not to mention a shit load of money and time.
Often matching manufacturers pre & power eliminates these issues and then there are other times you will find a manufactures equipment will blend equally, as well, with others, as with it's own. Check the voltage between the two if your not getting the desired result.
One more example: Reviewer recommends product "A" that works with his equipment and he is in awe of the experience.
Person can't listen to that item anywhere around him so he purchases it. He get item "A" shipped to him plugs it in with his gear; not impressed. Gives item "A" some break in ; still no fire works! Panick and buyers remorse settles in and makes a couple calls and listens, yet same results. This is a lot more common than you think and is system matching; avoid the marry-go-round.
This was mentioned in the best interest of not falling into this senario. Some extra ammunition in case some thing comes up.
Cheers,
Keith