WHERE THE BRITISH ROCK SOUND BEGAN
108 NAM A2 PROFILES + 41 PREMIUM IRs

The MRSH JT45 captures one of the foundational sounds of electric guitar — the unmistakable character of the legendary Marshall JTM45. Warm, dynamic, harmonically rich and gloriously responsive, this is the sound that helped define blues rock and laid the groundwork for generations of British rock amps that followed.

This is not a modern high-gain monster. It's something completely different: organic tube breakup, woody cleans, chewy crunch and raw vintage gain that responds directly to your hands and guitar.

With 108 NAM A2 profiles, including 54 DI profiles and 54 Full-Rig profiles, the pack explores the amp across a huge range of gain stages and tonal voicings.

SIX GAIN STAGES — FROM CLEAN TO LEAD

The JT45 has been captured across six distinct tonal stages, allowing you to explore how this classic circuit transforms as it gets pushed harder.

Start with Clean tones that are warm, open and full of character. Move into Low Gain and Mid Gain for edge-of-breakup and bluesy drive before hitting dedicated Crunch settings where the amp really starts to roar.

Push it further into High Gain and Lead, and you get the raw, saturated vintage rock sound of a classic British amp being driven hard.

No ultra-tight modern distortion. No polished preamp saturation.

Just old-school British gain doing exactly what it does best.

BALANCED. BRIGHT. VINTAGE.

Every gain stage is explored through three distinct tonal approaches:

Balanced delivers a versatile representation of the amp with plenty of body, clarity and bite.

Bright pushes the upper-mid attack and presence forward for tones that cut effortlessly through a dense mix.

Vintage leans into a warmer, rounder and more old-school response for blues, classic rock and authentic vintage-inspired tones.

Each voicing also features three individual DI variations, giving you significantly more choice within every gain stage.

54 DI PROFILES — PAIR IT WITH ANY CAB

The 54 DI profiles give you the complete amp response without a baked-in cabinet.

Pair the JT45 with Greenbacks for classic British rock, experiment with different vintage speakers, or completely reinvent the amp with a modern cabinet.

For recording and reamping, the DI collection gives you enormous flexibility while retaining the dynamics and breakup of the original amp.

54 FULL-RIG PROFILES — THREE CAB VOICINGS

The 54 Full-Rig profiles take selected amp settings and pair them with three different cabinet voicings.

That means every captured tone can immediately be auditioned through three different complete rigs without loading external IRs.

Want something warmer? Brighter? Bigger?

Switch the Full-Rig profile and keep playing.

41 PREMIUM IRs INCLUDED

For even more flexibility, the pack includes the Komposition101 IR Variety Starter Pack with 41 premium IRs.

The collection covers everything from boutique cleans and blues rock to classic British cabinets, Greenback-style flavors, modern rock and heavier cabinet options.

Combined with the 54 DI captures, you have everything needed to take the JT45 from authentic vintage territory into your own completely customized rig.

THE BEAUTY IS IN THE BREAKUP

What makes an amp like this special isn't how much gain it has.

It's how it gets there.

Hit the strings softly and the sound opens up. Dig in and the amp starts to growl. Roll back your guitar volume and a driven profile can clean up beautifully without losing its character.

That dynamic relationship between the guitar, player and amplifier is exactly why the JTM45 became such an important part of guitar history.

From glassy vintage cleans and edge-of-breakup blues to roaring classic-rock rhythm and screaming old-school leads, the MRSH JT45 is all about feel.

WHAT'S INCLUDED

108 NAM A2 Profiles
54 DI Profiles
54 Full-Rig Profiles
41 Premium IRs
Clean Profiles
Low Gain Profiles
Mid Gain Profiles
Crunch Profiles
High Gain Profiles
Lead Profiles
Balanced, Bright & Vintage Voicings
3 DI Variations Per Voicing
3 Full-Rig Cabinet Voicings
Komposition101 IR Variety Starter Pack

GENRES

Blues, Blues Rock, Classic Rock, Vintage Rock, Hard Rock, Psychedelic Rock, Garage Rock, Indie Rock

FOR FANS OF

Eric Clapton, Jimi Hendrix, Angus Young, Gary Moore, Paul Kossoff, Jimmy Page, Peter Green, Joe Bonamassa, Cream, Free