User Manual for RetroSound Redondo RS M2B Digital Media Receiver
Quick start guide for the RetroSound Redondo RS M2B Digital Media Receiver. Includes installation instructions for InfiniMount brackets and control shafts, plus basic operation for radio controls, presets, and system settings.
Table of contents
Manual images
Click an image to enlargeQuick guide from the manual
This document serves as a quick start guide for the RetroSound Redondo RS M2B Digital Media Receiver. It covers the essential installation steps for mounting the radio and provides a reference for basic operation, including knob functions, radio tuning, and system settings. For more comprehensive instructions, refer to the user manual included in your motor box or visit help.retromanufacturing.com.
What's in the box
- Radio Motor
- Control Shafts (x2)
- InfiniMount Brackets
- Hardware: 8 small screws, 8 washers, 10 nuts
Installation
Follow these steps to install the radio into your vehicle dashboard:

- Attach Brackets: Secure each InfiniMount Bracket to the Radio Motor using the eight small screws provided.
- Prepare Shafts: Place a Shaft Nut and Shaft Washer onto each Control Shaft before inserting them into the InfiniMount Brackets.
- Adjust and Secure: Adjust the Control Shaft depth and height as needed for your dash. Once positioned, secure each Control Shaft with a Shaft Nut and Shaft Washer, then plug each shaft into the side of the Radio Motor.
- Mounting: Use the optional hardware if needed to help mount the radio to the dash.
Control layout
The radio features four main knobs and five preset buttons:

- Left-Front Knob: Power, Volume, and Tone Control/EQ.
- Left-Rear Knob: Source mode selection.
- Right-Front Knob: Tuning, Mute, Clock, and System Settings.
- Right-Rear Knob: Radio band selection.
- Preset Buttons: Used for saving and recalling radio stations.
Basic operation
- Power: Press the Left-Front Knob to power on; press and hold to power off.
- Volume: Rotate the Left-Front Knob.
- Source Modes: Rotate the Left-Rear Knob clockwise.
- Radio Bands: Rotate the Right-Rear Knob counter-clockwise.
- Tuning: Rotate the Right-Front Knob.
- Mute: Press the Right-Front Knob.
System settings
To access sub-menus like EQ, Clock, Display Color, or Beep settings, use the Right-Front Knob or Left-Front Knob as indicated in the manual. Rotate to cycle through choices, press to select, and let the unit time out to save your settings.
Radio presets
- Setting: Tune to the desired station, then press and hold the desired Preset Button for two seconds.
- Recalling: Simply press the Preset Button corresponding to your saved station.
Official resources from the manual
Practical help
Common problems
Ensure you are pressing the Left-Front Knob to power the unit on.
Ensure you are in the correct sub-menu (Tone Control or System Settings) by using the appropriate knob as described in the operation section.
Before use
- Verify all hardware (brackets, screws, nuts, washers) is present
- Ensure the radio motor is ready for installation
- Check dash clearance for control shaft depth and height
Images and diagrams
- The installation diagram shows the assembly of the InfiniMount brackets to the radio motor using eight small screws.
- The control layout diagram identifies the five preset buttons and the four main control knobs.
Model compatibility
- Some features mentioned in the manual may not be available on all radio models.
Manual page author
David Miller
Documentation analyst
Organizes user manual content into clear summaries, with attention to model details, product context, and everyday usability.