Hi everyone, long time no post. I would like to ask, if I get noise from the treble end of the F2B, does it mean I have to switch out the tubes? Or is there something else wrong with my unit? I got mine brand new from the Mothership on 10/23/2019.

Here is a sound sample. Its bright switch on with treble at 10. This noise was present when I had bright switch on with 2-10-2 as well.

Thanks!

It turns out there is a weird thing that my Series 1 does is that sometimes there would be some noise on the hi end but as soon as I touch the side of the holes of the back panel with a screw driver, the noise will be gone. Its all good, for now 

Welcome Back, Jack. Nice to see you post-in again.