So with the guitar I built/posted the thread about, from the start the EMG's somehow have much less output than my other guitars.
It has all solderless connections and a new battery, the pickups are close to the strings etc. usual suspects. I even tried going straight from pickups to the output but no difference.
The sound is completely normal after raising the gain, it's just low output. Compare here to my ESP:
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Any wiring wizards here have any idea what's causing this? I've never ran across this issue before.