Phono preamp tube rolling.

I understand. I like to tube roll, however, the sonic characteristics of a tube or set of tubes will depend on the circuit being used.
I can't find which tube type the Ares Magnum uses, but there is a constant in selecting tubes for a phonostage; only use low-noise tubes. You often need to request they be noise tested by the dealer, or you state that they're for use in a phono preamp.
 The reason is the high amount of gain used to boost the signal from the cartridge. If using MC, you may need a high amount of gain which will increase any noise in the tubes. If using MM, not as critical.

Considering that the preamp accepts 3 different types of 12 volt tubes which will affect the overall gain considerbly it would be best to list your entire setup.

DeKay

@tvad
Lot of useful info. Thanks, tvad. I wasn’t familiar with this one.

@lewm 

it almost certain that you will be certain you hear differences

 :))))))) that is funny one. 
In fact I could hear the difference almost right away, however to realize which one is better to my ears take some time. Could be several days.  

@tomwh 
I don’t understand why you guys so desperately want to analyse some thing,  give a suggestions or answer some questions. It was no questions in my post. I just wanted to hear other people experience and stories rolling phono preamp tubes. Again my post did not contain any questions.