Had GAS for a Herbert again and watched tons of Clips since Yesterday, hence i made this Clip for me (and you) to compare...
I think i cured it for now.
Are your volumes really that low? Channel and master all on 1? Hope not. Because that's a no.
Your guitar is already low tuned and flubby sounding so cut the rumble out of the amp. Depth down. Bass down. The low end is completely bloated and fuzzy because the combination of low tune, your pickup, through a v30. It's coming across as hollow & really messy. Smeared. Channel 3 is really for leads on this amp.
BUT if you're using Channel 3 the amount of gain you are using with it is making the fuzz/smear thing worse. Looks like it's around 2:00... Drop that gain below noon on Channel 3 unless you're shredding arpegios I can't see that Channel and settings being worth a shit for any tight rhythm work. I'd head on over to 2+ for that if I were you in the first place. Clip you heard of mine was on 2+ straight in with no boost.
More mids. Less presence. More Treble. Less bass.
I think I remember yo posting an old JVM clip, I think even then I thought you were tuned a bit low to really hear much natural mid grind, it becomes all high and low at some point when the registers are shifted. Some amps voicing don't work well with some registers when the mids get shifted, also something to consider because it does matter. I used to tune drop B but it just don't have the solid grind of something like standard C, the lower the tunings, the harder it was to make certain amps do certain things because of the shift in register takes the whole voicing down and places mids in different /lower areas.
This is a herbert..it has lows and low mids for years. You need to dial in the balance to that. Which is shaping the Treble (this amp has usable treble on the channels) while dropping the low end. I think the tone shaping hits the Treble first, I've found the Treble to be a VERY powerful knob on a herbert. And depending on where you put that, makes the mid/bass react differently to my ears.