DEMO Celsius-Boss CE-1 Preamp

[Guardians of the analog]

hm, ok this isn't a hiss, here's the frequency response on high toggle, with the gain all the way up:
View attachment 70228

to me that's something different; i tried three different chips of both ICs, no change at all in sound. it's not the end of the world, but it's living rent free in my head.

Maybe start a troubleshooting thread

 

[jwin615]

hm, ok this isn't a hiss, here's the frequency response on high toggle, with the gain all the way up:
View attachment 70228

to me that's something different; i tried three different chips of both ICs, no change at all in sound. it's not the end of the world, but it's living rent free in my head.

That's the charge pump oscillations/switching. 9k. 18k octave.
But as GOTA said, start a troubleshooting thread. It will be good documentation for others with the same issue.
@Guardians of the analog classy build as always. I really dig the interplay of the 10 rings logo and single knob. Super clean.