Boss DUAL CUBE LX Guitar Amplifier User Manual

boss DUAL CUBE LX Guitar Amplifier Manual

Introduction to the BOSS DUAL CUBE LX

The boss DUAL CUBE LX Guitar Amplifier is a compact stereo modeling amplifier designed for electric guitarists who want flexible sound shaping in a small desktop or practice setup. Its two custom-designed 4-inch speakers and 10-watt stereo power section deliver a wide, detailed sound that works well for home practice, recording, rehearsing, and casual performance.

This portable guitar amplifier includes eight guitar amplifier types, a microphone preamp type, a three-band equalizer, and seven onboard effects. Chorus, flanger, phaser, tremolo, Heavy Octave, delay, and reverb provide a practical range of tones without requiring a large pedalboard. Amp and effect settings can be stored in 27 memories, making it easy to recall favorite sounds.

The DUAL CUBE LX also supports stereo pedals, guitar modelers, external audio playback, USB recording, livestreaming, and optional Bluetooth audio and MIDI connectivity. Its stereo line outputs include microphone cabinet emulation, while the Phones/Rec output supports silent practice and recording applications.

This amplifier suits beginners, students, home musicians, songwriters, content creators, and experienced guitarists who need a portable stereo monitor. It is especially useful when you want a simple practice amp with modern recording and connectivity features. The optional footswitch system adds hands-free control and enables use of the onboard looper.

BOSS DUAL CUBE LX Specifications and Features

• Amplifier type: Compact stereo guitar amplifier with amp modeling.
• Rated power output: 10 watts total, provided as 5 watts per channel.
• Speakers: Two custom-designed 4-inch speakers.
• Amplifier models: Eight guitar amp types plus one microphone preamp type.
• Effects: Seven onboard effects, including modulation, Heavy Octave, delay, and reverb options.
• Equalization: Three-band bass, middle, and treble controls.
• Memory storage: 27 user memories, with three memories available for each amp type.
• Inputs: Guitar or stereo input and an i-CUBE Link/Aux In connection for playback.
• Outputs: Stereo line outputs with microphone cabinet emulation and a Phones/Rec output.
• Recording: USB audio for direct recording and livestreaming.
• External control: Control connection for up to two external footswitches.
• Looper: Onboard looper function available when a compatible optional footswitch is connected.
• Power: Included AC adapter or eight AA batteries.
• Nominal guitar input level: -10 dBu with 1 M ohm input impedance.
• Nominal line output level: -10 dBu.
• Dimensions: Approximately 341 × 162 × 215 mm.
• Weight: Approximately 3.3 kg.

How to Set Up the BOSS DUAL CUBE LX Guitar Amplifier

1. Place the amplifier on a stable, dry, well-ventilated surface. Keep the speaker openings clear and leave space around the cabinet.
2. Turn the master volume fully down before making connections.
3. Connect your guitar to the GUITAR/STEREO IN jack using a suitable instrument cable. For stereo pedals or modelers, connect the left and right outputs to the corresponding stereo inputs.
4. Connect the included AC adapter, or install eight AA batteries if portable operation is required. Do not mix old and new batteries or different battery types.
5. Switch on the amplifier, select an amp type, and slowly raise the master volume.
6. Adjust gain for clean or overdriven response, then set bass, middle, treble, and effects controls to taste.
7. Connect a phone, tablet, or other playback device to the i-CUBE Link/Aux In jack for practice tracks. Keep playback volume moderate to avoid distortion.
8. For wireless audio or MIDI functions, install the optional Bluetooth Audio MIDI Dual Adaptor and follow the device-pairing instructions.
9. For recording, connect the amplifier to a computer by USB and select it as the input and output device in compatible audio software.
10. To use looping or hands-free memory control, connect compatible external footswitches to the CONTROL jack before operation.

Disconnect power before cleaning or moving the amplifier. Keep it away from water, excessive heat, and blocked ventilation. If unwanted noise occurs, lower connected device levels, check cable connections, and separate audio cables from power adapters.

BOSS DUAL CUBE LX Troubleshooting Guide

No sound from the amplifier

Confirm that the amplifier is powered on, the guitar cable is connected to the correct input, and the master volume is raised. Test the guitar, cable, and pickup with another known-working setup. If batteries are installed, replace the complete set with fresh batteries or use the AC adapter.

Sound is distorted or too loud

Reduce the guitar volume, input level, gain, or playback-device volume. When using a modeler or stereo pedal, lower its output level before increasing the amplifier master volume. Excessive gain may be intentional with some amp types, so select a clean model when a clearer tone is required.

Hum, buzz, or unwanted noise

Use properly shielded instrument cables and disconnect accessories one at a time to identify the source. Keep the amplifier away from strong electromagnetic sources, power supplies, and unshielded electronic devices. If the noise changes when touching the strings, inspect the guitar’s grounding and have it checked by a qualified technician.

USB recording or playback does not work

Check the USB cable, select the DUAL CUBE LX as the audio device in the computer or recording application, and confirm that the software input is not muted. Close and reopen the application after changing audio-device settings.

Bluetooth or footswitch functions are unavailable

Bluetooth operation requires the optional Bluetooth Audio MIDI Dual Adaptor. Confirm that the correct adaptor and compatible footswitch are connected securely. Consult the current owner’s manual and BOSS support documentation for software, connection, and compatibility updates. If the problem continues, contact an authorized BOSS service center or regional Roland/BOSS support department. Avoid opening the amplifier yourself, as internal servicing requires qualified personnel.

Pros and Cons of the BOSS DUAL CUBE LX

Advantages

• Wide stereo presentation: Two speakers create a broader sound than many compact single-speaker practice amplifiers.
• Flexible tone selection: Eight guitar amp types cover clean, edge-of-breakup, and higher-gain practice sounds.
• Built-in effects: Modulation, Heavy Octave, delay, and reverb reduce the need for separate pedals during practice.
• Portable operation: AC or eight-AA-battery power supports home use and mobile practice.
• Recording features: USB audio, stereo line outputs, cabinet emulation, and a Phones/Rec output support modern workflows.
• Preset convenience: Twenty-seven memories make it practical to store rhythm, lead, clean, and recording setups.
• Expandable control: Optional footswitches add hands-free operation and access to looping functions.

Limitations

• Limited acoustic output: The 10-watt stereo design is primarily intended for practice, desktop monitoring, and small personal setups rather than loud band performances.
• Optional accessories: Bluetooth functionality and foot-controlled looping require additional compatible hardware.
• Compact controls: Users who frequently edit detailed effects may prefer the DUAL CUBE LX Editor app instead of relying only on the front panel.
• Single-channel workflow: It is less suitable for musicians who need multiple independent instrument channels or extensive live mixing.
• Best fit: Choose this amplifier for portable stereo practice, home recording, and flexible guitar sound design. A larger stage amplifier may be more suitable for full-band performances or venues requiring substantial volume.