I recently got a POD Go primarily to use as an all-in-one pedalboard for my amp with the 4 cable method, and it's been great for that purpose so far. I've also been playing around with different amp models, trying to come up with analogues of my amp's tones so I can take the POD to jams with friends and leave my amp at home.

However, I've been having trouble getting my distorted tones to sound good to my ears. Played through the effects return of my amp yields a sound far too bass-heavy and boomy for my tastes, but then I get the opposite problem when I play with headphones, where it all sounds thin and flat and one-dimensional. My clean tone sounds just fine through both the amp and headphones, it's only the distorted patches that don't sound good.

For reference, my amp is a L6 Catalyst 200 and the headphones I've been using are AKG K240 Studios.

Has anyone here come across that issue, and if so how did you solve it? Any help would be appreciated.