Swapped the 5881 for EL34 for a test and found that the amp sounded more like your clips. Lost some of the girth but gained some clarity in the highs. More like a Marshall for sure.
These clips are just off the cuff trying to translate the amp. Forgive them haha
This amp does love boosts but I was surprised how well I was digging it with this speaker straight in.
The free update v3 is now live!
Added 10 captures using a Marshall 4x12 with 1971 Greenback. Two are liquid.
https://livereadysound.com/product/rogue-mono-mod/
Thanks. Sure, here is a lead clip, dry, no effect or post processing.
Interesting, the mids of the 87x are pretty intense in a unique way compare to other amps I have. I find it works best with standard or drop D tuning.