Carl Broemel

At 1:49, you can clearly see Broemel playing his black Duesenberg Starplayer. Taken from My Morning Jacket live performance at "Live at Letterman". The guitar is mentioned in 2021 Premier Guitar interview.

He also mentions his Duesenberg on this interview at Tone Report:

(...) I played my Duesenberg Starplayer, a Gretsch Tennessean, my Black Les Paul and GFI pedal steel.

After 3.10 in this video Carl talks about his 12 String Double Cat.

At 0.53 you can see Carl talking about his Black 1988 Gibson Les Paul that he customized. He added the Bigsby vibrato and he got this guitar when he was in college. There is a lot of stuff that is not original to this - pickups are not original as well. The guitar is mentioned in 2021 Premier Guitar interview.

At 0.53 you can see Carl talking about his Black 1988 Gibson Les Paul that he customized.

At 1.30 you can see Carl talk about his Goldtop. Fitted with original P90s. He bought this guitar when he was a roadie for another band. This guitar is from early 2000's.

At 2.09 in this video you can see Carl talk about his Starplayer. He got this guitar recently, maybe in 2011. He acquired this guitar right before My Morning Jacket started to work on "Circuital". He loves the tremolo bar, which is specific in Duesenbergs, as well as their pickups and tuners.

At 3:17 of Premier Guitar rig rundown, Broemel is showing his new Duesenberg Caribou. The guitar is mentioned in 2021 Premier Guitar interview.

At 3.43 Carl talks about his Gibson SG Junior.

The sessions for My Morning Jacket were done with limited gear, since James insisted everyone bring only essentials. For Broemel, that meant the Silvertone U1, two Les Pauls, and two Duesenbergs, and for James, it was the plywood Tele, one acoustic, and a prototype Gibson Jim James ES-335. /.../ Not to be outdone, Broemel opted for something vintage with plenty of quirk. "My new fave for the studio is a Silvertone U1," he says. "It's cool, light, plucky, and I used it on probably half of the new record. It's very clean and very low output, so the amps always sound friendly. It was a guitar you bought at Sears for $20. It has a lipstick pickup, a volume and tone knob, and a 3-position switch that in the middle position doesn't do anything, but one way is a low roll-off and the other way is a high roll-off. For a pickup that's that close to the neck, to be able to roll-off some lows makes it more useful to me."

According to Premier Guitar's 2021 interview, Broemel uses Gibson Les Paul Junior.

Carl Broemel uses a Fender Custom Shop Telecaster, which features a fattened neck and a Bigsby, as noted in the "My Morning Jacket Rig Rundown" by John Bohlinger for Premier Guitar.