This page about Randall RM4 Modular Tube Pre-Amp is a stub. You can help improve it:

Home
... Musical Instruments
Amplifiers
Guitar Amplifiers
Guitar Preamps
Randall
Randall RM4 Modular Tube Pre-Amp

Randall RM4 Modular Tube Pre-Amp

5.0 (1)

This product is Vintage or Discontinued

Find out who is using Randall RM4

0 wishlisted

1 saved

Page last updated Aug 10, 2025

Pricing and availability

Store

Reviews

Price

^* Product prices and availability are updated by Equipboard every 24hrs and are subject to change. Equipboard may receive compensation for purchases made at participating retailers linked on this site. This compensation does not affect what products or prices are displayed, or the order of prices listed. For more information, please refer to our affiliate disclosure.

Description

Edit description

Unlock a world of tonal possibilities with the Randall RM4 Modular Tube Pre-Amp, a versatile powerhouse that caters to guitarists seeking both flexibility and superior sound. This preamp isn't just about offering four customizable channels; it's about giving you the freedom to tailor your sound with a diverse range of MTS Series preamp modules (sold separately). Whether you're chasing pristine cleans or searing high-gain tones, the RM4 can adapt to your needs with a simple module swap, making it feel like a custom-built, multi-channel rig in a compact, rack-mounted package.

Designed with the gigging musician in mind, the RM4 features parallel and series effects loops, allowing seamless integration of your favorite pedals and processors. MIDI capability ensures that you can control your setup with precision, whether you're on stage or in the studio. With front and rear panel inputs and two 12AX7 tubes to buffer the effects loop, the RM4 isn't just flexible; it's built for performance.

The allure of the RM4 lies in its modularity, offering a choice of over a dozen modules to craft your unique sound. From the iconic warmth of a '59 Fender Bassman to the modern crunch of a Mesa/Boogie Dual Rectifier, the RM4 makes it possible to have your favorite sounds at your fingertips. It's a dynamic tool that evolves with your musical journey.

Key Features:

Four independent channels with modular preamp options
Parallel and series effects loops with mix control
MIDI In/Through for seamless integration
Pre and post loop outputs with buffered effects
Front and rear panel inputs for versatile connectivity

Videos

Add video

randallamplifiers

Randall RM 4

randallamplifiers

Stonerverb - Aliens & Mandarines + guitar master tracks | Salvation Audio

Salvation Audio

Randall RM-4 Preamp day 1

mentoneman

Reviews

Add review

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Randall RM4 Modular Tube Pre-Amp.

Features and functionality

0 0

Billy's current live rig includes multiple modular tube preamps in a Randall RM4, each modded to mimic specific studio amps for varied song tones.
Source

Mods and upgrades

0 0

Owners suggest splitting humbuckers with push-pull pots for versatility, combining humbucker bridge tones with single coil neck tones for clean sections.
Source

Comparisons

0 0

Lace Sensors, described as single coils with P90-like characteristics, offer a clean sound with gain capabilities, differing from humbuckers due to reduced hum.
Source

User experience

0 0

Some users experience issues with push-pull pots for splitting pickups, potentially due to faulty potentiometers, impacting the ability to toggle between sounds.
Source

Use cases and applications

0 0

For replicating Smashing Pumpkins' clean tones, Lace Sensors in Fenders are favored, offering a balance between single coil clarity and humbucker-like output.
Source