I recently started recording guitars for my band's next release (about fucking time) and after trying my JEM and deciding it sounded too thin (for Death Metal rhythm), we tried my Jackson KE2 (EMG 81/60) and decided we had to use it. Sounded way beefier and meaner in general, but there was one hitch. We looked at the waves of the test recordings and they were MEGA compressed.
Yeah, sure. EMGs are typically more compressed than passive pickups, but this was at brickwall levels and something was clearly wrong.
We tried a few things - checking all settings on the DI box, changing pickup height, testing different cables. No avail and we weren't having the same issue with any other EMG equipped guitars.
As a last resort, I suggested changing batteries and our drummer (who's basically producing this) was sceptical but we tried it anyway.
Boom. It worked. Never thought a battery could cause an issue that way around, but there you go!
Hope this is useful to at least someone.