Mofimadness,
Good point. I stand corrected. The higher gain stages will make pre and pre-preamp microphonics more audible. However the bigger tubes are actually more susceptible to it.
Most people like the microphonic sound. In David Gilmour's studio they have put all their tubes in a completely separate room in order to avoid this issue.
However, I still think the OP might be overdriving the preamp, as the PS1 plays ok.
Good point. I stand corrected. The higher gain stages will make pre and pre-preamp microphonics more audible. However the bigger tubes are actually more susceptible to it.
Most people like the microphonic sound. In David Gilmour's studio they have put all their tubes in a completely separate room in order to avoid this issue.
However, I still think the OP might be overdriving the preamp, as the PS1 plays ok.