In my area, there's that little grind band, nice guys, but, their bassist and guitar player have like negative gear knowledge.
I went to one of their practices and play a bit with them (as a guitar player) and their guitarist used an really old boss multi effects pedal
(and a warlock copy for 100$) into the bass combo of the drummer's father (like 30 years old, original tubes...).
His settings were like: Gain cranked, Bass cranked, Treble cranked, no mids.
I thought "ok this is so shitty, it could work for their style" but after 10 seconds of ultra-feedback
(with master on 1, for practice they needed the master on 7 or 8) I thought "ok, that is the most shittiest tone on earth".
I brought my setup that I build for practices (for me it was ok soundwise and loudness wise and cheap):
Randall RH100 head, Harley Benton Vintage 30 equipped 2x12, Behringer Noise Gate and some Rack 2x15 Channel EQ.
Sounds ok if you turn the mids up, use gain on like 5/10 and pull the bass down.
So in the end, you heard the drummer (he's ok, good blastbeats), me, and the singer (he's actually really good).
The other guitarist's sound wasn't even there so I said (because they are friends of me) :
"Come on, you can use this little setup until you have the money to buy something better".
A few months later, they had a show in a nice little venue here, 2 other bands showed up, brought a massive amount of guitar and bass equipment:
Koch Powertone, Mesa Mark IV, modified Marshall and an Engl Fireball, 2 Marshall 1960 cabinets and an old Mesa Cabinet.
For Bass an Ampeg 8x10, Ampeg SVT, Sansamp and some other basshead (I think SWR or Warwick, not sure).
The guitarist was allowed to use everything (the bassist, too).
In the end, guitarist used his multieffects pedal directly into the mixer (with a huge amount of feedbacks) and the bassist
used a Behringer Bass Overdrive directly (also feedbacks because of the shitty bass).
The 2 other bands had a great sound with their equipment and the bassist of the little grind band said it was
all due to the mistakes the foh guy did...