Low level crackling sound coming from speakers

I have a low level crackling sound coming out of speakers. The sound is very low level but is noticeable. It does not go up as the volume is increased, if it does it is very little. The sound can also be heard through my headphones through the amps headphone jack. I unplugged everything and tried other outlets. It was in both speakers so I ruled out cables first. It is also consistent among input sources, so interconnects have been ruled out. I checked the headphones today and the sound is the same as with the speakers. I am assuming it is a capacitor inside the amp somewhere possibly in the preamp stage that might need to replaced. What does everyone else think?

Gear list
Creek Evolution Amp
Schiit Modi2 Uber Dac
Audioquest Dragonfly Gen 1
Sony PS1
Project Xpression III
V-LPS phono Pre
EPOS Epic 2 Speakers
Grado Sr60 Cans
MIT Cables
Decibel app
Tidal HIFI