Introduction
The Roland Micro Cube Bass RX is a compact, battery-powered bass combo amplifier designed for portability and versatility. It features stereo power amplifiers and four newly developed 4-inch (10cm) speakers, delivering a robust sound in a small form factor. This manual provides detailed instructions for the setup, operation, and maintenance of your amplifier.
Key features include:
- Stereo power amplifiers and four newly developed 4-inch (10cm) speakers.
- Eight COSM amp models, six digital effects, and a chromatic tuner built in.
- Rhythm Guide function for practical rhythm training.
- Stereo AUX input for CD/MP3 players, and Phones/Recording output.
- Battery-driven (6 x AA, up to 11-hour continuous use), AC adaptor included.
Safety Information
Please read and understand all safety instructions before operating the Roland Micro Cube Bass RX. Keep this manual for future reference.
- Power Supply: Use only the specified AC adapter or 6 AA batteries. Ensure correct polarity when inserting batteries.
- Placement: Avoid placing the unit in direct sunlight, near heat sources, or in excessively humid or dusty environments. Ensure adequate ventilation.
- Handling: Do not drop or subject the unit to strong impacts. Do not attempt to disassemble or modify the unit.
- Cleaning: Use a soft, dry cloth for cleaning. Avoid liquid cleaners or solvents.
- Volume Levels: Prolonged listening at high volume levels can cause permanent hearing loss. Always set the volume to a moderate level.
Package Contents
Verify that all items are included in your package:
- 1 x Roland Micro Cube Bass RX Amplifier
- 1 x AC Adaptor
- 1 x User Manual (this document)
Setup
1. Powering the Unit
The Micro Cube Bass RX can be powered by either the included AC adapter or 6 AA batteries.
- Using the AC Adaptor: Connect the AC adapter to the DC IN jack on the rear panel of the amplifier and plug it into a standard electrical outlet.
- Using Batteries: Open the battery compartment on the rear panel and insert 6 AA batteries, ensuring correct polarity. Close the compartment securely.
2. Connecting Your Instrument
Plug your bass guitar or microphone into the INPUT jack on the front panel. For microphones, use the MIC input setting on the COSM Amplifier dial.
3. Connecting External Devices
- Headphones/Recording: Connect headphones or a recording device to the REC OUT/PHONES jack on the rear panel.
- Auxiliary Input: Connect an external audio player (CD/MP3 player) to the AUX IN (MONO or STEREO) jacks on the rear panel.
- Foot Switch: Connect an optional foot switch to the FOOT SW jack for remote control of certain functions (e.g., Start/Stop Rhythm Guide, Tap Tempo).
Operating Instructions

1. Power On/Off
Locate the POWER switch on the front panel. Flip the switch to the 'ON' position to power on the amplifier. The power indicator light will illuminate.
2. Adjusting Volume and Gain
- GAIN Knob: Adjusts the input sensitivity. Turn clockwise for more drive and distortion, counter-clockwise for a cleaner sound.
- VOLUME Knob: Controls the overall output level of the amplifier.
3. COSM Amplifier Settings
The COSM AMPLIFIER dial allows you to select from various amplifier models and input types:
- SUPER FLAT: Provides a clean, uncolored sound.
- FLIP TOP: Emulates a classic bass amp tone.
- B MAN: Offers a powerful, vintage bass sound.
- BASS360: Delivers a rich, full-bodied bass tone.
- SESSION: Ideal for studio-like clean tones.
- CONCERT 810: Simulates a large concert bass rig.
- OCTAVE BASS: Adds a lower octave effect to your bass sound.
- MIC: Optimizes the input for microphone use.
4. Equalizer (EQ)
Use the EQUALIZER knobs to shape your tone:
- BASS: Adjusts the low frequencies.
- MIDDLE: Adjusts the mid-range frequencies.
- TREBLE: Adjusts the high frequencies.
5. Effects (EFX)
The EFX section provides a range of digital effects:
- CHORUS/FLANGER/T-WAH: Select one of these modulation effects using the switch, then adjust its intensity with the corresponding knob.
- DELAY/REVERB: Select either delay or reverb using the switch, then adjust its level with the corresponding knob.
6. Rhythm Guide
The RHYTHM GUIDE function offers various drum patterns for practice:
- PATTERN Knob: Selects the desired rhythm pattern (e.g., Rock, Blues, Country, Ballad, Jazz, Funk, Latin, Dance, Metronome).
- START/STOP Button: Starts or stops the rhythm guide.
- TAP TEMPO Button: Tap this button multiple times to set the desired tempo.
- VOLUME Knob: Adjusts the volume of the rhythm guide independently.
7. Tuner Function
The built-in tuner allows you to tune your instrument. Activate the tuner by pressing the TUNER button (if available, or by a specific combination of controls as per the video). The indicator lights will guide you to the correct pitch.
Video Demonstrations
Roland Micro Cube Bass RX Controls Overview
This video provides a detailed overview of the Roland Micro Cube Bass RX amplifier's control panel, including the equalizer, effects, rhythm guide, and amplifier settings. It demonstrates how to adjust various knobs and switches to achieve different sounds and functions.
Roland Micro Cube Bass RX Rhythm Guide and Effects Demonstration
Watch this video to see the Rhythm Guide function in action, demonstrating various drum patterns and tempo adjustments. It also showcases the different effects available on the amplifier, such as chorus, flanger, and delay/reverb.
Roland Micro Cube Bass RX T-Wah Effect Demonstration
This video specifically highlights the T-Wah effect on the Roland Micro Cube Bass RX, demonstrating its unique sound characteristics when applied to a bass guitar.
Maintenance
- Cleaning: Regularly wipe the amplifier with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Battery Care: If the unit will not be used for an extended period, remove the batteries to prevent leakage and damage.
- Storage: Store the amplifier in a cool, dry place away from extreme temperatures and humidity.
Troubleshooting
If you encounter issues with your Roland Micro Cube Bass RX, refer to the following common solutions:
- No Sound:
- Ensure the amplifier is powered on and the volume knobs (GAIN, VOLUME) are turned up.
- Check all cable connections (instrument, power, external devices).
- Verify that the correct COSM Amplifier setting is selected.
- If using batteries, check if they are depleted or inserted correctly.
- Distorted Sound:
- Reduce the GAIN or VOLUME settings.
- Check your instrument's output level.
- Ensure the selected COSM Amplifier model is appropriate for your desired sound.
- Rhythm Guide Not Working:
- Press the START/STOP button to activate the rhythm guide.
- Adjust the RHYTHM GUIDE VOLUME knob.
- Ensure a pattern is selected with the PATTERN knob.
For further assistance, please contact BOSS customer support.
Specifications
| Feature | Detail |
|---|---|
| Item Weight | 14.99 pounds |
| Product Dimensions | 8.15 x 11.65 x 11.57 inches |
| Item Model Number | MICRO CB-RX |
| Batteries | 6 AA batteries required. |
| Color Name | Black |
| Compatible Devices | Bass Guitar |
| Connector Type | 3.5mm Jack |
| Material Type | Ac |
| Speaker Count | 4 |
| Output Wattage | 5 |
| Battery Type | Alkaline |
| Power Source | Battery Powered |
| Date First Available | August 18, 2008 |
Warranty and Support
The Roland Micro Cube Bass RX comes with a manufacturer's warranty. Please refer to the warranty card included with your product for specific terms and conditions. For technical support, service, or further inquiries, please visit the official BOSS website or contact their customer service department.
Online resources and support can be found at: www.boss.info





