DUAL CHANNEL MODIFICATION SET FOR RANDALL RM4*

This is a modification set for the Randall RM4* preamp. The modification enables the use of dual channel modules in Randall single channel MTS amplifiers. The range of features include channel selecting, storing and MIDI switching via program change or control change messages for up to four single or dual channel modules. 

The set consists of a PCB, cables and additional accessories. Tools like screwdrivers are not contained. The set comes with an operation manual and detailed step by step installation instructions. Each work step is illustrated by a picture to guide you through the wole conversion procedure. The installation guide will be provided as a pdf-file after the purchase.

The newest MIDI-board-version features a MIDI-channel-learn funtion. It can either be set to OMNI (receiving on all channels) or a specific channel between 1 and 16. Changes can be made and stored with the front pannel knob. The amp can now also be controlled by CC-messages.

Once the amp is opened up to be modified it is highly recommended to also add a manual cathode-bypass-switch to adjust the amount of low frequencies that pass through the first gain stage inside the amp. It helps to keep the sound tight when using high gain modules. The effect of the switch can be heard in the RM100-demo-video.

The newest dual-channel-upgrade supports all single and dual channel modules - also Synergy three tube modules.

Disclaimer: There are high voltages inside a tube amplifier, even when it is switched off. The modification requires soldering skills and must only be done by an educated electrician / amp tech! Don´t risk physical injuries or a damaged amplifier. Better let your local amp tech perform the modification.

* This product is neither related nor made by the Randall brand or its parent group