Aesthetix Calypso and Berning ZH270 combo noise.

Could it be because both of the amps using switch mode power supplies?

If I adjust the volume to "16", the preamp is much quieter than "17". There are more similar steps up. I have not heard this before when I used it balanced.

I have a Hydra 8, but the use of it doesn’t affect the noise at all.
The strange thing is that the noise is rising and dropping a lot when only a slightly change in volume setting is done. (+/- 1db). Example: The noise is high when the volume setting showing “40”, but it is low when showing “41”. This is happening between more steps. I have tried to change the tubes to different brands, but the noise problem is still there. I have just bought me a new Joule Electra LA 150 MKII. Hope this will solve the problem.

Yes, the noise problem is multiple of 8. What do you mean with this? “He said that after he rearranged his cabling, the problem was gone.”
I have got new cables to. Stereovox SEI/LSP. I don’t use the Hydra for the moment. I have to contact Aesthetix then. The pre was not like this when I used it with a cary cad 211 ae.

Thans for your help, Jafox!