James Hetfield

The official Metallica website has a list of equipment used by each band member during their 2010 tours. For the front-man and rhythm guitarist of Metallica, James Hetfield, They list the Mesa/Boogie Triple Rectifier Guitar Amp Head.

In this picture James Hetfield can be seen playing through a Diezel VH4 live on Howard Stern. Link to the video -

https://youtu.be/tW4frZE4pfI

This article says that James used a modded Marshall JCM800 in conjunction with a Pro Co Rat distortion pedal.

James used the Mark IIC+ on Master of Puppets and And Justice For All...

On this photo from 1984 or 1985 you can see the MarkIIC+ in the background.

The Roland JC120 has been a main part of James's clean sound since the recording of Master Of Puppets. He still uses it today.

From a November 2011 article found on mesaboogie.com:

"The core of the preamp switching and FX integration happens via Mesa/Boogie Amp Switchers controlled with Digital Music Corp.’s GCX Expander switching units. The Boogie amps being switched are two Triaxis Preamp’s run into a 2:90 Power amp. One Triaxis is set to the Mark IIC+ mode while the second Triaxis is used for clean sounds in the Green Clean mode. Like Kirk, James also has DBX Quad gates and T.C. Electronic G Major FX Processors along with a few extra pedals kept in the rack. The signal runs out of the 2:90 into two Mesa Traditional Straight 4x12s for a true stereo mix." (original source: http://mesaboogie.com/news/2011/11/metallica-live-rigs/)

Back in the early 80's James Hetfield used a modified Marshall JMP 2203 (the amp which later became the JCM800 2203) he used this amplifier up until 1984 because it got stolen. After the amp got stolen, James bought a JCM800 2203 and had it modified.
These amplifiers can be seen on a lot of live footage of the early Metallica days as well as on the documentary "Some Kind Of Monster" You cab see the amplifier in this picture as well. https://www.flickr.com/photos/dyingindowney/2432208001

James Hetfield is pictured using the Blackstar Series One 200 Guitar Amp in a user-uploaded photo.

Here is a picture from "Some Kind of Monster", a documentary about the making of St. Anger. We see a Peavey 5150 sitting under one of James' Marshalls. It's unclear whether this actually belonged to James.

The item can be seen at 7:26 min in the video.

Seen on stage in almost every Metallica live video, James uses Mesa Boogie 4x12 Roadking and Rectifier cabinets with a custom grill cloth, loaded with Celestion Vintage 30's

James Hetfield appears to use a modified Mesa/Boogie Stiletto Deuce Stage II head during performances of the National Anthem at various sports events, such as Giants, Sharks, or Warriors games. The amplifier's front panel is customized with team colors, and Hetfield's "JH" badge replaces the original Stiletto badge. Despite these modifications, the control layout remains consistent with a Stiletto head. This suggests its suitability for a single 4x12 live setup or possibly its tonal preference for these performances. A user-uploaded photo supports this observation.

Around 2007, prior the recording of Death Magnetic James started experimenting with Krank Krankenstein and Revolution 1 amps, which he ended up using on the album.

In the video, Metallica is rehearsing with Lemmy, you can spot James Hetfield certainly playing on a Blackstar 100W series One (maybe 6l6 version). However, I do not know if this has ever been used on stage.

In this video, James Hetfield's rig is also shown to consist of a Matrix GT1000FX-1U power amp.

Three of them can be seen in this picture of James' rig for Master of Puppets and ...And Justice For All. They were modified Mesa/Boogie Mark IIC heads. Here is a link to an article showing it's James' rig: https://www.thegearpage.net/board/index.php?threads/james-hetfield-live-rig-pictures-and-settings-1984-1993.1990933/

– Garage Inc. A 100w Wizard Modern Classic was used as the main amp on the album. also in the picture is James's first electric guitar the Gibson SG.

In the "Making of Moth into Flame", he plugged his Snakebyte into a Mini Rectifier 0:28

In the July 2011 performance at Sonisphere, James Hetfield uses the Diezel Hagen 100W Tube Guitar Head Amp, as seen in Metallica's "Am I Evil?" video.

In the YouTube video "The Guitars of Metallica: Kill Em All era" by CIRCLE OF TONE, it is discussed that James Hetfield used a Marshall JMP50 Plexi Amp Head during his early days with Metallica.

This picture from the book: back to the front, shows James hetfields rig during the ride the lightning era. It was a Marshall Jmp 2203 boosted with a tube screamer. The rig also features two tc electronic dual parametric equalizers and a Ibanez stereo box.

Metallica producer Greg Fidelman has revealed that James Hetfield relied on a “legendary” Marshall head – modded by Eddie Van Halen’s amp guru José Arredondo – for almost every track on Metallica’s new album, 72 Seasons.

Fidelman is interviewed by Total Guitar as part of its huge cover feature on the metal legends’ new record and was responding to a prompt about the band’s more British-style tone on the record when he mentioned the guitar amp.

“James has always had one of the legendary José Arredondo-modded Marshalls, a late-’60s/early-’70s Superlead head,” says Fidelman.

“When we did Hardwired... [To Self Destruct in 2016] it wasn’t working very well. When we started this album, I had a re-invigorated interest in this head. I was talking with Dave Friedman, who is very familiar with those old José mods, and he fixed it.

“When I got it back, I told James I thought it sounded insane, and he got really excited about it. It ended up on every song. I think that’s what you’re hearing.”

The pictures in the source link confirm that Hetfield used this amplifier at some point.

James was using quad preamps and studio preamps during justice - black album era

Used for overdubs over the black album

Both James Hetfield & Kirk Hammett were using ADA MP-1 & ADA MQ1 EQ in their racks during the ...And Justice for All and Black Album era.

In this user-uploaded photo, James Hetfield is seen using a Mesa/Boogie Triple Rectifier Two Channel Head, identifiable by its distinctive black grill, during a live performance.

at 2:30 on this Youtube link shows there is a shot showing at least 3 sets of two orange guitar 4 *12 cabinets. it is safe to assume that James Hetfield is one of the guitarists who are utilizing the cabinets.

James Hetfield - with Mesa/Boogie Dual Rectifier Trem-O-Verb Combo Amp

Used live during the black album tours