Here's the Marshall DSL40c doing a clean rhythm, or trying. I overdubbed the same backing track I used for the Deluxe Reverb demo above. Same American Standard Tele with ash body and maple neck, a very bright-sounding guitar.
I'm using the full power mode (40 watts), clean channel, no crunch mode, master volume dimed, gain on about 6, bass 6, mid 5, treble 4, presence 6, resonance 0, reverb 0.
The SM57 is on axis, just outside the dust cap, about half an inch from the grill cloth. I tracked some delay as it sounded pretty plain by itself.
The lead on the right during the mix part is the same guitar and amp. I engaged the crunch mode, dialed the mids up to 6-7, the bass back to about 5, and otherwise left it the same.
It was loud. As always, I was playing in another room with two closed doors between me and the beast, monitoring at a comfortable level through my studio monitors.
It's not a terrible clean tone. It wouldn't be my first choice, but I could see using the rhythm track in a song if the performance were good (rather sloppy in fact). I'd need to play around more to figure out the best settings. Right away, I'd move that mic another inch or two outward from the dust cap. The lead Tele sound, nah.