THIS COLLECTION IS DESIGNED TO BE USED WITH KEMPER PROFILER PRODUCTS.
 
JS Kemper Mars 74x Ultimate and DI v2 Rig Collection
 
The JS Kemper Mars 74x Ultimate and DI v2 Rig Collection is based on my Marshall 1974x Handwired amplifier, captured using the new Kemper v2 profiling process.
 
This collection delivers the raw, dynamic character of this classic British circuit — from open, cleaner tones to fully driven, harmonically rich overdrive — all built to feel right under your hands.
 
What You Get
22 Total Rigs
11 Studio Rigs (Amp + Cab)
11 Direct Rigs (Amp Only, merged with matching cab)
 
The Direct Rigs can be:
Used as-is with the included cab
Swapped with any Kemper cab or IR
Run into a real guitar cabinet
 
Kemper v2 Matters
These profiles were created using the latest Kemper v2 profiling technology.
 
Channel-Based Gain Structure
This collection captures both channels of the amp across multiple volume settings, giving you a clear and usable range of tones.
 
Channel I and Channel II each bring their own character, with gain levels based on the amp’s volume control.
 
Channel II also includes a 2L variation, captured using the Low Input, offering a slightly cleaner and more controlled response at lower gain.
 
Naming Convention (Simple and Clear)
JS Mars 74x (i or ii) x
i = Channel 1
ii = Channel 2
x = Volume Setting / Gain Level
2, 4, 6, 8, 10
2L (Channel ii only)
Low Input used
 
Designed to Be Used
These rigs are built to:
Work immediately out of the box
Respond naturally to your playing
Serve as a strong foundation for your own tones
No overbuilt signal chains — just solid amp tones ready to go.
 
Why This Collection
The 1974x is all about touch, dynamics, and classic British character.
 
This set gives you:
A consistent range of gain stages across both channels
Natural transition from clean to overdrive
Tones that sit well in a mix without extra work
 
If you’re looking for straightforward, great-feeling British tones built on the new Kemper v2 platform, this collection delivers.