Boss Dual Cube Bass LX Bass Amplifier User Manual

Content

BOSS DUAL CUBE BASS LX Bass Amplifier Manual

Introduction

The BOSS DUAL CUBE BASS LX is a compact stereo bass amplifier designed for practice, songwriting, recording, rehearsal, and small performance environments. Its two custom-designed 5-inch speakers and 10-watt stereo power section deliver a wide, balanced sound in a portable cabinet. The amplifier can operate from the included AC adapter or eight AA batteries, making it suitable for home use, lessons, backstage preparation, and portable playing.

Five bass-focused amplifier types—Super Flat, Flat, Vintage, Modern, and Rock—provide a practical range of clean, warm, aggressive, and contemporary tones. A three-band equalizer, compressor or drive control, and built-in modulation, delay, reverb, and touch-wah effects allow players to create complete sounds without additional pedals. Up to 15 settings can be stored in memory for quick recall.

Practice features include 27 onboard rhythm patterns, an optional looper controlled by a footswitch, and audio playback through the i-CUBE Link/Aux In connection. USB audio supports direct recording and livestreaming, while the stereo XLR balanced output can connect the amplifier to a PA system or recording interface. Bluetooth audio and MIDI control are available when the optional Bluetooth Audio MIDI Dual Adaptor is installed.

This BOSS DUAL CUBE BASS LX Bass Amplifier suits beginners, practicing bassists, teachers, home-recording musicians, and performers who need a flexible compact bass combo with modern connectivity.

Specifications and Key Features

Amplifier type: Compact stereo bass amplifier with five amp types: Super Flat, Flat, Vintage, Modern, and Rock.
Power output: 10 watts total through a 5-watt-per-channel stereo power section.
Speakers: Two custom-designed 5-inch speakers.
Controls: Three-band equalizer with bass, middle, and treble adjustment, plus bass-tuned compressor or drive control.
Effects: Chorus, flanger, touch wah, delay, and reverb.
Memory: Fifteen user memories, with three memories available for each amplifier type.
Rhythms: Twenty-seven onboard patterns covering nine rhythm types with three variations each.
Looper: Available through the onboard looper function when a compatible optional footswitch is connected.
Connections: Stereo XLR balanced line output, Phones/Rec jack, USB audio, i-CUBE Link/Aux In, and a control jack for up to two external footswitches.
Power: Included AC adapter or eight AA batteries.
Editor support: The dedicated DUAL CUBE BASS LX Editor can provide expanded sound editing and rhythm access.
Wireless expansion: Optional Bluetooth Audio MIDI Dual Adaptor support for compatible wireless audio and control functions.

How to Set Up the BOSS DUAL CUBE BASS LX

Basic Bass Amplifier Setup

Place the amplifier on a stable, dry surface with clear airflow around the cabinet.
Turn the master volume fully down before connecting equipment.
Connect the bass guitar to the INPUT jack using a suitable instrument cable.
Connect the AC adapter, or install eight AA batteries with the correct polarity for portable operation.
Turn on the amplifier, select an amp type, and raise the master volume gradually.
Set the bass, middle, and treble controls near their center positions, then adjust them for the room and instrument.
Add compression, drive, modulation, delay, or reverb only after setting a clean basic tone.

Playback, Recording, and Pairing Options

Connect an audio source to the i-CUBE Link/Aux In jack for backing tracks or practice material. For computer recording or livestreaming, connect the amplifier to a computer by USB and select the DUAL CUBE BASS LX as the audio device where required. Use the stereo XLR output for a PA or mixer. The optional Bluetooth Audio MIDI Dual Adaptor is required for supported Bluetooth audio and MIDI functions; pairing and device selection should follow the adaptor and amplifier instructions.

Keep the volume low when connecting or disconnecting cables. Do not operate the amplifier in rain, near water, or where ventilation is blocked. If no sound is heard, check the instrument cable, bass volume, input selection, power source, and master volume before increasing levels.

Troubleshooting the BOSS DUAL CUBE BASS LX

No Sound

Confirm that the amplifier is powered on and that the AC adapter is firmly connected or the batteries are correctly installed.
Check the bass guitar’s volume control, pickup selector, and cable. Test with another known-good instrument cable.
Raise the master volume slowly and verify that headphones are not muting the speaker output when connected.

Weak, Distorted, or Unwanted Noise

Reduce excessive input level from the bass or connected audio device.
Inspect cables for damage and keep instrument cables away from power adapters and other noise sources.
Reduce drive, effects, or extreme equalizer settings if the sound is too aggressive or unclear.
Replace depleted AA batteries or use the supplied AC adapter to confirm whether power is the cause.

USB or Bluetooth Connection Problems

Use a compatible USB cable, reconnect the amplifier, and select the correct audio device in the recording application.
For wireless functions, confirm that the optional Bluetooth Audio MIDI Dual Adaptor is installed and repeat the pairing procedure.
Install the appropriate BOSS editor or driver updates when required by the computer or mobile device.

The available product documentation does not identify user-facing error codes for this amplifier, so do not assume codes from another BOSS model apply. If the problem continues, consult the current DUAL CUBE BASS LX owner’s manual, software support materials, or the authorized BOSS/Roland service channel for the relevant region. Keep proof of purchase and the unit’s serial information available when requesting warranty or technical assistance.

Pros and Cons

Advantages

Versatile bass tones: Five amplifier types cover clean practice sounds, vintage character, modern punch, and rock-oriented drive.
Complete practice platform: Built-in rhythms, effects, memories, and optional looping reduce the need for separate equipment.
Portable operation: Battery power is useful for lessons, rehearsals, travel, and locations without convenient mains power.
Recording-ready design: USB audio and stereo XLR output are more flexible than the basic headphone outputs found on many compact practice amplifiers.
Stereo presentation: Two speakers provide a broader effect and playback image than a typical single-speaker bass practice combo.

Limitations

Limited acoustic headroom: The 10-watt stereo power section is intended for practice and compact applications rather than loud full-band performances.
Optional expansion hardware: Bluetooth audio and MIDI require the separate Bluetooth adaptor, while looping requires a compatible footswitch.
Small speakers: The 5-inch drivers are portable and convenient but may not deliver the deep low-frequency projection of a larger bass cabinet.
Best audience: It is especially suitable for home practice, recording, teaching, and songwriting. Bassists needing high stage volume or extended low-end projection may need a larger dedicated bass combo or PA system.

Frequently Asked Questions

Can the BOSS DUAL CUBE BASS LX run on batteries?

Yes. The amplifier can operate from eight AA batteries or the included AC adapter.

Can it record directly to a computer?

Yes. USB audio supports direct recording and livestreaming with compatible computer software.

Does it include Bluetooth?

Bluetooth audio and MIDI functions require the optional Bluetooth Audio MIDI Dual Adaptor.

Can it connect to a PA system?

Yes. The stereo XLR balanced line output can connect directly to a PA system, mixer, or suitable recording setup.

PDF

Faqs

How do I set up the boss Dual Cube Bass LX Bass Amplifier for the first time?

Place the boss Dual Cube Bass LX Bass Amplifier on a stable surface with space around its speakers and controls. Connect the included AC adaptor, or install eight AA batteries if portable operation is needed. Turn the master volume down, plug your bass into the INPUT jack, then power on the amplifier. Select an amp type, set gain and volume gradually, and adjust bass, middle, and treble to suit your instrument and room.

Why is my boss Dual Cube Bass LX Bass Amplifier producing no sound?

Check that the amplifier is powered on and that the AC adaptor is firmly connected, or confirm that all eight batteries are installed correctly and have sufficient charge. Test the bass cable and instrument with another amplifier if possible. Make sure the master volume, channel volume, and bass guitar output are raised. Also unplug headphones, because using the PHONES/REC OUT jack mutes the built-in speakers.

How can I connect the boss Dual Cube Bass LX Bass Amplifier to headphones for silent practice?

Connect stereo headphones to the PHONES/REC OUT jack on the boss Dual Cube Bass LX Bass Amplifier. Lower the master volume before putting on the headphones, then raise it slowly to a comfortable level. This output is useful for quiet bass practice, recording, and livestreaming. If you use headphones with an inline microphone, check the microphone volume control and confirm that the plug uses a compatible stereo CTIA configuration.

Can I use the boss Dual Cube Bass LX Bass Amplifier with a phone, tablet, or computer?

Yes. Connect a phone, tablet, or other audio source to the i-CUBE LINK/AUX IN jack with a suitable stereo cable for playing backing tracks. The USB-B connection can send amplifier audio to compatible recording or livestreaming software. Enable loopback only when you want incoming playback mixed with your bass signal. For wireless audio and editing, the optional Bluetooth adaptor may be used if compatible with your setup.

How do I create a louder stage sound with the boss Dual Cube Bass LX Bass Amplifier?

For rehearsal or performance, connect the LINE OUT L and R XLR outputs to a suitable PA system or powered mixer. Set the amplifier tone and effects first, then bring up the PA input level gradually to avoid clipping. The built-in speakers are useful for monitoring, while the balanced stereo line outputs provide a practical way to send the bass sound to larger audio equipment without relying only on the compact combo speakers.

How do I save and recall bass tones on the boss Dual Cube Bass LX Bass Amplifier?

Build your sound by selecting one of the available amp types, then adjust gain, compression or drive, equalization, effects, and volume. Use the memory controls to store the finished setting in an available memory location. The boss Dual Cube Bass LX Bass Amplifier provides 15 memories, with three locations associated with each amp type. Save separate patches for clean practice, driven tones, effects, and live performance levels.

What should I do if the boss Dual Cube Bass LX Bass Amplifier sounds distorted or muddy?

Start by reducing the bass guitar’s volume and the amplifier’s gain, compression, or drive control. Excessive low-frequency boost can make a small room sound muddy, so lower the bass control and adjust the middle range carefully. Try the Super Flat or Flat amp type for a neutral starting point. If distortion occurs only through a PA or recording interface, reduce the receiving device’s input gain to prevent clipping.

How should I maintain and store the boss Dual Cube Bass LX Bass Amplifier?

Keep the boss Dual Cube Bass LX Bass Amplifier dry, away from excessive heat, dust, and direct sunlight. Wipe the cabinet and controls with a soft, dry cloth, and do not spray cleaner into the jacks or speaker openings. Disconnect the AC adaptor when storing the unit for an extended period. Remove AA batteries before long-term storage to reduce the risk of leakage, and inspect cables and connectors regularly for damage.