Boss AC-22LX Acoustic Amplifier User Manual

Content

BOSS AC-22LX Acoustic Amplifier Manual

Introduction

The BOSS AC-22LX Acoustic Amplifier is a compact stereo amplifier designed for acoustic-electric guitars and other acoustic instruments with pickups. Its two custom 5-inch twin-cone speakers and 10-watt stereo power section deliver a clear, spacious sound for practice, songwriting, small performances, lessons, and home recording.

A key feature is Air Feel, which simulates the depth and natural resonance of stereo microphone techniques. Five settings—Dry, XY, AB, ORTF, and Mid-Side—help shape the character of the amplified instrument without requiring external microphones. The guitar or instrument channel includes three-band equalization, reverb, and reverb-and-chorus effects, while the dedicated microphone channel provides an XLR input, phantom power, two-band EQ, and reverb.

The amplifier also includes an onboard rhythm box with 15 patterns, memory locations for saving sounds, a stereo auxiliary input, stereo line output, and USB audio with loopback for recording or livestreaming. An optional Bluetooth Audio MIDI Dual Adaptor adds wireless playback and mobile editing capabilities.

This acoustic guitar amplifier suits performers who need portability and flexible sound shaping. It is also useful for singers who play acoustic guitar, because the microphone and instrument channels can operate together. For quiet practice, the unit can run from eight AA batteries; for extended sessions, use the included AC adaptor.

Specifications and Key Features

Amplifier type: Stereo acoustic instrument amplifier with Air Feel processing.
Rated output: 10 watts total, delivered as 5 watts per channel.
Speakers: Two custom-designed 5-inch twin-cone speakers.
Instrument channel: Guitar or instrument input with three-band EQ, reverb, and reverb-plus-chorus effects.
Microphone channel: XLR input with phantom power, two-band EQ, and dedicated reverb.
Air Feel settings: Dry, XY, AB, ORTF, and Mid-Side.
Sound memories: Fifteen locations for storing and recalling setups.
Rhythm box: Fifteen onboard rhythm patterns, with additional pattern customization available through the AC-22LX Editor.
Connections: Stereo auxiliary input, stereo line output with Air Feel, USB audio, and optional Bluetooth connectivity through the BT-DUAL adaptor.
Looper: Built-in looper function requiring a compatible optional footswitch.
Power options: Included AC adaptor or eight AA alkaline or rechargeable Ni-MH batteries.
Editor compatibility: AC-22LX Editor software for macOS, Windows, iOS, and Android.

How to Set Up the BOSS AC-22LX

Place the amplifier on a stable, dry surface with clear space around the speakers and ventilation openings.
Connect the included AC adaptor, or install eight AA batteries with the amplifier switched off. Match the battery polarity markings inside the compartment.
Turn all channel and master controls down before connecting equipment.
Connect an acoustic-electric guitar or pickup-equipped acoustic instrument to the GUITAR/INSTRUMENT input using a suitable instrument cable.
Connect a dynamic or compatible condenser microphone to the MIC input. Enable phantom power only when the microphone requires it.
Switch on the amplifier, then slowly raise the instrument, microphone, and master levels.
Choose an Air Feel setting, adjust the EQ, and add reverb or chorus gradually. Save the finished sound to a memory location if you want quick recall.
For practice or performance backing, connect an audio source to AUX IN. The optional BT-DUAL adaptor enables wireless audio playback and mobile editor functions.
For recording or livestreaming, connect the USB port to a computer or compatible mobile device and select the amplifier as the audio interface.

Never connect or disconnect cables with excessive volume enabled. Keep liquids away from the amplifier, use only the specified adaptor, and allow batteries to cool before replacement. If unwanted feedback occurs, lower the microphone level, move the microphone away from the speakers, and reduce reverb.

BOSS AC-22LX Troubleshooting

No Sound

Confirm that the amplifier is powered on, the correct input is selected, and the channel and master controls are above zero. Check the instrument cable, microphone cable, battery condition, and pickup battery. Test the source with another cable or input when possible.

Distorted or Weak Sound

Lower the instrument or microphone gain and check whether the source signal is overloading. Excessive bass or boosted EQ can also reduce clarity. Replace weak batteries and verify that the AC adaptor is firmly connected.

Feedback or Howling

Increase the distance between the microphone and speakers, aim the microphone away from the speaker faces, and reduce microphone volume or reverb. Acoustic instruments with sensitive pickups may require a lower stage level or a different Air Feel setting.

Rhythm, Memory, or Looper Problems

Confirm that the selected rhythm pattern is active and that its level is audible. Recall the intended memory location and save changes after editing. The looper requires a compatible optional footswitch, so it will not operate from the amplifier alone.

USB or Wireless Connection Issues

Use a suitable USB cable, reconnect the amplifier, and select the AC-22LX as the audio device in the recording application. Wireless functions require the optional BT-DUAL adaptor. Keep the mobile device close to the amplifier and remove other active Bluetooth connections if pairing fails.

The amplifier does not use user-facing error codes for routine operation. For manuals, software, warranty questions, or repair assistance, use the official BOSS support request system or contact an authorized Roland/BOSS service center in your region. Do not open the amplifier; internal servicing should be performed by qualified technicians.

Pros and Cons

Advantages

Natural acoustic presentation: Air Feel provides several stereo-microphone-style voicings, giving amplified guitar more depth than a basic single-channel practice amp.
Useful two-channel design: The instrument and microphone inputs support singer-guitarists without requiring a separate mixer.
Flexible practice tools: Rhythm patterns, sound memories, reverb, chorus, USB audio, and optional looping support cover practice and performance needs.
Portable operation: The compact cabinet can run from eight AA batteries, making it practical for rehearsals and locations without convenient mains power.
Recording capability: USB audio with loopback is helpful for home recording, online lessons, and livestreaming.

Limitations

Moderate power: The 10-watt output is suitable for practice, intimate performances, and small spaces, but larger venues may require PA support.
Optional wireless hardware: Bluetooth playback and related mobile functions require the separate BT-DUAL adaptor.
External footswitch requirement: The built-in looper needs a compatible optional footswitch for hands-free control.
More setup flexibility means more controls: Beginners may need time to understand Air Feel, EQ, effects, memories, and rhythm functions.

The BOSS AC-22LX is best for acoustic players, singer-guitarists, teachers, home musicians, and performers who value stereo tone and recording connectivity. Players needing high stage volume, extensive mixing inputs, or a full PA system should consider a more powerful acoustic amplifier or dedicated PA setup.

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Faqs

How do I set up the boss AC-22LX Acoustic Amplifier for the first time?

Place the boss AC-22LX Acoustic Amplifier on a stable surface with both speakers unobstructed. Connect the supplied AC adapter or install eight AA batteries, then turn all channel and master levels down before connecting your instrument. Plug an acoustic-electric guitar into Guitar/Instrument, or a microphone into the Mic input. Raise the relevant channel volume gradually, then adjust EQ, reverb, chorus, and Air Feel to suit the room and instrument.

Why is my boss AC-22LX Acoustic Amplifier producing no sound?

Check that the amplifier is switched on and receiving power from the AC adapter or correctly installed batteries. Confirm the instrument cable is fully inserted into the Guitar/Instrument input and that the channel volume and master volume are raised. If using a microphone, check its channel level and phantom-power requirement. Test with another cable or instrument, disconnect external devices, and inspect whether the problem affects one input or every sound source.

How can I reduce feedback with the boss AC-22LX Acoustic Amplifier?

Move the boss AC-22LX Acoustic Amplifier away from the instrument’s sound hole and avoid pointing the speakers directly toward the guitar or microphone. Lower the channel volume before increasing the master level, and reduce bass or any frequency that makes the sound boom. Try a different Air Feel setting, reposition yourself, and keep microphones behind the speaker coverage. If feedback continues, reduce reverb and use less aggressive tone settings.

What is the Air Feel feature on the boss AC-22LX Acoustic Amplifier, and when should I use it?

Air Feel shapes the acoustic sound to imitate different stereo microphone approaches, helping a pickup-equipped instrument sound more natural. Start with Dry for a direct, focused tone, then compare the XY, AB, ORTF, and Mid-Side options at low volume. Choose the setting that best matches your guitar, playing position, and room. For recording or livestreaming, monitor each option through headphones or connected equipment before saving a preferred setup.

Can I connect a microphone and acoustic guitar to the boss AC-22LX Acoustic Amplifier at the same time?

Yes, the boss AC-22LX Acoustic Amplifier is designed with separate Guitar/Instrument and Mic channels, allowing a performer to use an acoustic guitar and vocal microphone together. Connect the guitar to the instrument input and the microphone to the XLR Mic input, then adjust each channel independently. Start with low levels to prevent feedback, set the microphone position carefully, and balance vocals against the guitar before adding reverb.

How do I use the rhythm box and looper on the boss AC-22LX Acoustic Amplifier?

Select a built-in rhythm pattern, set its level, and start playback while keeping the instrument volume comfortable. To use the integrated looper, connect a compatible optional footswitch and assign its controls through the AC-22LX Editor if needed. Record a short phrase, stop recording to begin playback, and overdub only after confirming timing. Keep rhythm and looper levels separate from the instrument channel so the backing does not overpower your performance.

Can the boss AC-22LX Acoustic Amplifier connect to a phone or computer?

The boss AC-22LX Acoustic Amplifier supports several external-audio options. Use the Aux input for wired playback from a compatible mobile device, or install the optional BT-DUAL adapter for Bluetooth audio and wireless editor control. For recording and livestreaming, connect the amplifier to a computer through USB and configure the AC-22LX as the audio device. Check input and output selections in the recording software before starting, especially when using USB Loopback.

How should I maintain and transport the boss AC-22LX Acoustic Amplifier?

Keep the boss AC-22LX Acoustic Amplifier dry, away from excessive heat, dust, and direct sunlight. Wipe the cabinet and control panel with a soft, dry cloth, and avoid spraying cleaner into switches, jacks, or speaker openings. Disconnect cables by gripping the plugs rather than pulling the cords. Remove batteries during long-term storage to help prevent leakage, and use a padded bag or case when transporting the amplifier.