Kirk Hammett of Metallica has used the TC Electronic M2000 effects processor, as documented on Angelfire.

This is a picture of the rack John used for the 2002 World Tourbulence tour. Among the various units there's a TC electronic M2000 (sixth from bottom to top). Confirmation of this being John's rack can be found in this diagram from Guitar Geek and at :15s in this video.

My whole thing has always come from a solidstate sound, because it’s loud and it’s clear. That’s sort of a fundamental difference between my sonic approach and something like a Vox AC30 or, say, a Fender Twin, where there’s a very slight fuzz around the note. You even hear that with Grant Green and Kenny Burrell. My thing is more like a steel guitar kind of sound. (Ed. Note: Metheny’s guitar tech, Carolyn Chrzan, details, “He currently uses a Digitech 2101 preamp. Two outputs go to a QSC PLX1804 amp and then to a 4×10 cabinet and a 2×10 cabinet, both loaded with JBLs. The other two Digitech outputs go to a T.C. Electronics M2000 studio effects processor, to another QSC amp, and out to two single-15 cabinets.”)

From an interview with the Prodigy's chief live sound engineer: "The [Roland] Dimension D is used to make the guitar big, because we've only got one guitarist and we try to make everything bigger than everything else. I've also got a [Yamaha] Rev 7 and a Rev 5. I've got them Y?split together because they've got a habit of stopping working, so one of them is usually working at any one time. They're both drum reverbs, I just run them both off the snare. Then I've got a guitar reverb, an SPX990, and a [TC Electronic] M2000 on vocals, which does harmoniser on some songs and reverbs on others. Then I've got a TC D•Two for all my more traditional delays.”

In terms of gear, I have used a lot of TC products over the years such as the M2000, M3000 and FireworX processors, but now I mainly use the G-System, both for effects, but also as an amp channel controller.

List of effects at Paul Robb's studio:

Aphex Type C2 Exciter. BBE 462 Sonic Maximiser enhancer. Drawmer DL241 dual compressor. "I generally strap this across the stereo buss. At some point I'd like to get a better compressor, though." Boss SE50. Boss SE70. "I primarily use these for distortion." Digitech VFX Valve FX. "This is an awesome distortion box. It's so bright it will rip your head off." Ensoniq DP/2. "I also use this primarily for distortion. All four of my distortion boxes [Digitech Valve FX, Roland SE50 and SE70, Ensoniq DP2] are absolutely critical to me. They're indispensable. I rarely use synthesizers anymore without running them through a guitar box." Eventide H3000 multi‑effects. FMR Audio RNC1773 Really Nice Compressor (x3). "These are my new favourite boxes. They make them in Texas, and they're incredibly cheap — 179 dollars, I think it was. But they're great, and on a par with the Drawmer compressor." Focusrite Red 2 Dual EQ. "It's mostly just gorgeous looking! Everyone who comes in here notices it. It looks like a piece of candy, you just want to bite on it. The thing is, it's so intimidating to look at, you really can't tell if it's any good or not — it doesn't need to be any good! I like it, though it's not quite good enough to strap across the whole mix: the EQ3D is on a par, even though it's half the price." Focusrite Red 7 Voice Channel. "This has a mic pre, a compressor, an enhancer and a de‑esser in it, which we use for recording vocals." Lexicon MPX1 multi‑effects. Lexicon PCM70 multi‑effects. Nightpro EQ3D filter. Peavey Analog Filter. "I actually very rarely use this. I've run some loops through it to make them sound crunchy and lo‑fi and it works OK. These techno people use outboard filters all the time — it's just that this one isn't a particularly good one, and I can't justify spending a grand on something like the Waldorf DPole or the Mutator." Roland SDE1000. "I just use this for simple delays." Roland SRV2000 reverb. SPL Vitalizer. "I think this is a lot more popular in Britain than it is here. I like it, but it has so much background hiss that I can only use it in loud noisy music. The great thing about it is the way it spreads the stereo fields, it's got some kind of phase." TC Electronic M2000 multi‑effects. Yamaha SPX90 multi‑effects. "This was the first effects box I ever bought and it's totally on its last legs. I keep it for its stereo split program, because it sounds so grainy and nice."