May I ask what tips you're using with the 3580? It seems to make a lot of difference. For example when I switch from stock tips to complys two resonance peaks just seem to disappear.
EDIT: silly me, it looks like I had two EQs on at the same time No wonder everything was sounding wrong. With complys the peaks are different but not as drastically as I described above.
Edited by Joe Bloggs - 1/5/12 at 8:37am