Note that the H3000 series has the XLR wired as pin 3 hot compared to other audio products (and the eventual de facto standard of pin 2 in the US).  So if you connections eventually get unbalanced and you’re mixing in the effected audio with the dry signal then you’ll thin out the sound and hear something similar to what you describe.

Try running a 100% wet into both and do not mix any dry signal in direct from the source and compare.

Hello tmoravan and thank you for your reply!

I didn’t know about the different XLR wiring, so I’ve modified my cables to the correct specs and tried it again,  but the tone of my D-SE it’s still very bright. compared to the H3000 factory plugin that it’s better balanced (a full range closer to the source tone), so bright that I have to EQ it to let it sound more warm in the mix..

I’m start thinking that maybe this is not an issue with my unit, but it’s own tone?

Do you confirm that the unit sounds on the brighter side?

THX