Jim James

In the source photo, Jim James' 3 Monkeys The Orangutan amp head can be seen behind him. He talks about his amp setup:

I have finally found an amp I love both on the road and in the studio— the 3 Monkeys Orangutan. It is unreal how versatile this amp sounds. It can truly do everything. I feel like I’m doing a product endorsement right now... But I’m really being serious. The amp sounds amazing and it looks beautiful, too—like the monolith from 2001: A Space Odyssey or something. God bless that amp.

The image is from 3monkeysamps.com. The amp makes another appearance in 2021 Premier Guitar interview.

Seen here with his Mesa Boogie and cabinet.

Listed in this June 16, 2015 Guitar World interview.

• GUITARS: (James) Early Sixties Gibson Barney Kessel, early Fifties Martin 000-style acoustic; (Broemel) Duesenberg Starplayer, Gretsch Tennessean

• AMPS: (James) 3 Monkeys Orangutan; (Broemel) Fender Tweed Deluxe and Seventies Vibrosonic; (both) Fender Sixties Princeton Reverb, Gibson Maestro Reverb-Echo

• EFFECTS: (James) Spaceman Sputnik Germanium Fuzz; (Broemel) Roland RE-201 Space Echo, Fulltone Tube Tape Echo, Spaceman Saturn V Harmonic Booster, Ibanez tube screamer

Fender Princeton Reverb was included in James' "gear list" in 2015 Premier Guitar article.

According to the Mesa Boogie's official website, James uses the Mesa Boogie Rectifier guitar extension cabinet. The cab (possibly, as it is just marked as a Mesa Boogie cab) makes another appearance in 2021 Premier Guitar interview.