@pwjazz and @DarthPool
This was ages ago now, but you were talking about Ottmar Liebert and some springy, reverby sounds you kept hearing. I’m not sure if you ever figured out what it was.
It’s the guitar. I’ve played guitar for almost 30 years now. That sound is caused when the string vibrates at a particular rate and basically starts slipping off either the nut or the bridge. It could also be fret buzz (the vibration barely makes contact with the fret rapidly).
TLDR: What you’re hearing is the guitar, it’s not something wrong with a pair of headphones. If you can’t hear it or it doesn’t get annoyingly grainy with a pair of headphones, they’re probably not very good in that frequency range.
I could totally see thinking that it’s your headphone driver acting up. In fact, I’ve had headphone drivers make similar noises. In this case, it’s totally natural and is in the recording.
I’ve always hated that noise, as well as fret buzzing, which you can hear both of throughout all of these tracks in various places.
It’s one of those tradeoffs you have to make as a guitarist. You can get better playability with lower action, slinkier strings, etc., but you’ll get things like buzz or the like for doing so.