i've played the mesa 800.. great amp... I played the mesa 112 at guitar sanctuary.. Nice cab but it Nothing like the older PH112 that mesa had. similar but the PH just felt more full IMO. Others will disagree..
I dont gig in FW that often at this time. . When Rusty burns was alive i was out there with him often. im with lance lopez most times now and we are not local.. But if i have a gig in FW i should have yo come to a gig and see the magellan amp..
In a store setting the BA112 seems to have smoother mid transition than the subway cab and also seemed to go lower without getting muddy.. Not that the Mesa was muddy.. It was not.
10 years ago I wanted a 2Ω capable head for almost everything, and only a few folks made them. Now i only need that option occasionally.
The MG800's ability to do 2.67Ω does what i need it to do all the time ....so far....
That may not work for you and your situation though.
Both are great amps But i like the feature set on my magellan.. The thing that bugs me about the M800 is the limit light . .I see one of my friends using his and that light seems to be on most of the time.. Or at least flashing a lot. He is a slap gospel player. So maybe those peaks cause that. Im more if a finger player and occasionally slap and or pick..
I never thought that i would say this, but so far i have not run out of power with my MG800 when using my 210 Formfactor and 115 Uber at 2.67Ω . Its really LOUD and clean... That cab combo is a bit mid scooped when up close but seems better when 10 feet away.. ( maybe because of the cab combination) but i adjust the para mids on the MG800 and it's fixed..
Im glad i dont have the little limit light flashing making me think i'm out of headroom,,
Maybe the MG800 has a limit light?? If so i have not hit it yet
I think synergy would play a big part in how these 2 heads compare (your BG & cabs) (& what your tone goals are).
I'd love to compare the MG800 + a pair of BA12-3 to the D800 + Subway 112 over Subway 115.
I'm leaning Genzler, though.