What Actually Matters in a Metal Amp Sim (After 20 Years of Watching People Get It Wrong)

There are more metal amp sims now than there have ever been, and somehow it's harder than ever to pick one.

Every single one is "the most brutal tone ever". Every one has a demo video where some bloke plays a riff you'll never write through a mix you'll never get. Every one comes with 400 presets.

So let's cut it down to what actually matters, because after roughly 20 years of recording bands I can tell you it comes down to four things, and "number of presets" is not one of them.

1. How Fast Do You Get to a Tone You'd Actually Keep?

This is the whole ballgame and almost nobody talks about it.

I've watched it happen in my own studio more times than I can count. A band comes in, the guitarist plugs in, the tone isn't right, and instead of playing they start tweaking. An hour later the riff they walked in excited about has gone cold and everyone's flat.

At home it's worse. You've got a job, you've got a family, and you've got maybe three hours on a Sunday. When that window opens, the thing has to work immediately.

So when you're judging a metal amp sim, the honest question isn't "can it get a good tone?" — nearly all of them can, eventually. It's how long does it take, and can you do it again next week without remembering a menu path.

400 presets is not versatility. It's a search problem you've been handed instead of a sound.

2. Does It React Like an Amp?

This is the one you can hear but can't screenshot.

A real amp changes when you change how you play. Dig in and it gets meaner. Back off and it cleans up under your fingers. Roll the guitar volume down and the whole character shifts.

A lot of amp sims don't do that. They've got one gain state and they smear everything into it, so playing harder just makes it louder and slightly worse.

That comes down to gain staging and the tonestack — the boring internals nobody puts on a product page. It's why the amps here got a proper realistic tonestack in the 2.0 update instead of another preset bank. Reactivity is what makes you keep playing.

If you're auditioning anything, do this: play the riff soft, then play it hard. If the plugin doesn't change personality, you'll be bored of it in a fortnight.

3. Can You Take It Somewhere Else When You Need To?

There's a trap on both ends of this.

Too simple and you outgrow it in a month. Too deep and you never write anything, because you've turned your guitar rig into Microsoft Excel.

What you actually want is fast by default and deep when you go looking. One page, everything in front of you, nothing hidden — with real depth underneath for when a song genuinely needs it.

That's what 2.0 was about across all three amps. Custom pedals. Custom FX sections. A proper tonestack. And you can load your own IRs, so if you've got a cab you love you're not stuck with mine.

More places to take it. Same thirty seconds to a tone.

4. Does It Actually Own a Sound?

Here's the one that gets missed.

Most amp sims try to be everything for everyone, and the result is a plugin that's competent at eleven genres and thrilling at none. Fine for a session player. Useless if you make one kind of music and you want it to sound extreme.

I'd rather build three amps that each properly own their thing.

SLAMP is the slamming death metal one. Thick, dense, wet-cement heavy, sits in a mix like poured concrete. Two channels, four pedal voicings, three cab types, tuner and gate built in. If you write slam, brutal death or deathcore, this is a death metal amp sim that isn't apologising for anything.

SVARTRUNA is the cold one. Black metal filth, HM-2 grind, grim atmospheric walls of guitar. Nasty in a completely different direction to SLAMP. There's a longer piece on it here.

CATAMP is the versatile one, built around the character of some very famous boutique amps that happen to have "Cat" in their names. Punchy pop-punk, responsive crunch, hard rock rhythms. And no, despite the artwork, it's not a joke — the cat on the front is Morty, who was my studio partner until cancer got him last year.

Three amps. Three sounds. None of them pretending to be the other two.

Stop Reading, Start Playing

Here's the bit I believe in more than any paragraph on this page.

You cannot judge a metal amp sim from a demo video. The playing isn't yours, the guitar isn't yours, the mix isn't yours, and the whole thing has been produced to sound good.

So all three amps have a full-featured 7-day demo. Not a crippled version. Not "presets locked". The whole plugin, in your DAW, with your guitar and your riffs, no card required. VST, AU, AAX and standalone. Windows and Mac.

Try it. If it doesn't get you writing, you've lost nothing but a download.

And when you do buy, it's a one-time purchase. No subscription, no iLok, no licence server deciding whether you're allowed to work tonight.

Final Word

The best amp sim for metal is the one that gets you from plugged-in to writing before the idea goes cold, reacts when you dig in, goes deeper when the song needs it, and properly owns the sound you actually make.

That's the whole list. Everything else is presets.

Have a squiz at all three amps here and grab the demo.

Cheers,

-Jay