ward s
While we're on the subject of guitar gods doing weird ****, I read that Duane Allman often played through a bass amp and cabinet to get that rich tone. I have a version of Blue Sky from a show in New Orleans where his tone is so rich and full, it had to be with that bass rig.
I kind of fell into that by accident (well more out of being broke/cheap). For a couple years the only band I was playing I was on bass so I bought an old Traynor Bassman and Ampeg 4x12 bass cab. Then I got asked to play guitar for another band but didn't have the cash to buy a whole new rig so plugged in through the bass rig and just tossed my Metal Zone onto it. It was punk/thrash type stuff so it sounded nice and meaty and worked. Over the years every now and then I would use guitar amps for that project (equipment sharing with other bands or in the jam space... whatever) and it just didn't sound right unless I was using super powerful and expensive 100watt stacks (like 5150s or JCM 2000s). Eventually after I completely destroyed the bassman (which was tube powered and a pain to maintain) I discovered a neat little bass amp that worked great for my tone that was wicked cheap. The Yorkville 400b. It was a compact 400w bass amp with a ten band EQ section and one big 20" speaker (well around 20"... I forget exactly the size). It was LOUD, had a really nice clean tone for adding stompboxes, the EQ section let me really dial things in, the speaker barked like a pack of dogs, it was solid state and pretty much indestructible, it was heavy but compact so I could move it easily (fit in the back of a cab or was easy to dolly around), etc.
Considering a lot of time those gigs were not mic'd (small dive bars) I needed that extra power and really the extra bottom end and lack of break up when cranking it (which is no good when you are using super thick distortion like the MT-2) made that amp and most bass amps great for the stuff I like to do. Totally influenced my sound.
Still clean tones are a lot fuller through a bass amp too. I like Fender and HiWatt for clean tones but they are missing that bottom end roundness to an extent. There is of course a reason for that (don't want to interfere with the bass) but I like those lower freqs. Cranking them on a guitar amp makes things sound muddy. Getting them from a bass amp (without cranking the bottom) just sounds nice and clear.