Boss KATANA-AIR EX Guitar Amplifier User Manual

Introduction to the BOSS KATANA-AIR EX Guitar Amplifier

The boss KATANA-AIR EX Guitar Amplifier is a compact, wireless guitar amplifier designed for practice, songwriting, rehearsal, and casual performance. It combines BOSS amplifier modeling and effects with a built-in wireless guitar system, Bluetooth audio streaming, battery operation, and stereo sound from two 5-inch speakers.

With the included AC adapter, the amplifier delivers up to 35 watts of maximum power. When powered by compatible AA batteries or the optional rechargeable amp power pack, it provides a rated 20-watt output, making it suitable for rooms, studios, workshops, and portable playing sessions. The wireless transmitter helps reduce cable clutter while preserving a direct playing experience.

The amplifier supports electric guitar input, auxiliary audio, headphones, USB connection, and stereo line output. Players can use the BOSS Tone Studio ecosystem to adjust tones, organize sounds, and manage compatible amplifier settings. Bluetooth audio is useful for practicing along with backing tracks, lessons, or streamed music.

This BOSS wireless guitar amp suits beginners who want a flexible practice setup, experienced guitarists who need a convenient desktop amplifier, and musicians who value quick setup without traditional pedalboard wiring. It is especially useful for home practice and recording preparation, although players requiring high-volume band rehearsal should consider a larger dedicated amplifier.

BOSS KATANA-AIR EX Specifications and Features

• Amplifier type: Wireless desktop guitar amplifier with onboard amp modeling and effects.
• Maximum AC output: 35 watts total, configured as 17.5 watts per channel.
• Battery output: 20 watts rated output, configured as 10 watts per channel when using compatible batteries or the BTY-NIMH/A rechargeable amp power pack.
• Speakers: Two 12 cm, 5-inch speakers for stereo playback.
• Guitar input: 1/4-inch phone-type input with a nominal input level of -10 dBu and 1 MΩ input impedance.
• Wireless connection: Dedicated transmitter connection for compatible wireless guitar operation.
• Audio streaming: Bluetooth connectivity for playing music and backing tracks through the amplifier.
• Auxiliary input: Stereo miniature phone-type AUX IN connection.
• Headphone output: Stereo miniature phone-type PHONES OUT connection for quiet practice.
• Line output: Left/mono and right 1/4-inch outputs with a nominal output level of -10 dBu.
• Computer connection: USB Type-B port for compatible audio, recording, editing, and update functions.
• Power options: Included AC adapter, compatible AA batteries, or an optional rechargeable amp power pack.
• Sound control: Amplifier voices, effects, tone controls, preset storage, and editing through the amplifier and compatible BOSS software.

How to Set Up the BOSS KATANA-AIR EX

1. Place the amplifier on a stable, dry surface with clear ventilation around the cabinet. Keep it away from moisture, heat sources, and obstructed spaces.
2. Connect the included AC adapter to the DC IN jack, or install the required compatible batteries with the correct polarity. Use only the supplied adapter for AC operation.
3. Turn the amplifier volume and guitar level down before making connections. Plug a guitar into the INPUT jack, or connect the compatible wireless transmitter to the guitar.
4. Switch on the amplifier, then activate the wireless transmitter if using wireless operation. Allow the transmitter and amplifier to establish their connection before playing.
5. Select an amplifier sound and gradually raise the volume. Adjust gain, tone, effects, and master level to suit the guitar and playing environment.
6. For backing tracks, pair a compatible mobile device through Bluetooth and start playback at a low device volume. Use AUX IN when a wired audio source is preferred.
7. Connect headphones for silent practice, or use the LINE OUT jacks for an external mixer, recorder, or audio interface.
8. Install BOSS Tone Studio and consult the applicable owner’s manual when editing tones, updating firmware, or connecting optional wireless controllers.

If wireless audio is absent, recharge or replace the transmitter battery, reduce the distance between devices, and remove nearby sources of radio interference. Never operate the amplifier with a damaged power cable, blocked ventilation, or excessive moisture.

BOSS KATANA-AIR EX Troubleshooting Guide

No sound from the guitar

Check the amplifier master volume, guitar volume, input selection, and cable. If using wireless operation, confirm that the transmitter is charged, inserted correctly, and paired with the amplifier. Test the guitar through the conventional input to isolate a wireless connection issue.

Wireless signal drops out

Move the guitar closer to the amplifier, fully charge the transmitter, and keep large metal objects or other wireless equipment away from the signal path. Restart both the transmitter and amplifier if the connection does not return.

Bluetooth audio will not connect

Remove the amplifier from the mobile device’s remembered Bluetooth list, restart Bluetooth, and repeat the pairing process. Keep only one intended source active during initial pairing and verify that the mobile device is sending audio to the amplifier.

Sound is distorted or too loud

Lower the guitar volume, gain, master level, and backing-track volume separately. Excessive input level can create unwanted clipping even when the master volume is moderate.

No sound through headphones or line output

Insert the connector fully, confirm the destination device is set to the correct input, and test another cable. For stereo equipment, verify left and right connections and use the L/MONO output when connecting to a mono destination.

Firmware, USB, or software problems

Use the current owner’s manual and BOSS support documents for the exact update procedure. On Windows computers, install the compatible KATANA driver when automatic installation is unavailable. Do not disconnect power or USB during a firmware update.

Do not attempt internal repairs. For unresolved faults, retain the amplifier model and serial information and contact the authorized BOSS or Roland product-support department through the official support channel. Warranty service depends on the region, purchase documentation, and applicable local terms.

Pros and Cons of the BOSS KATANA-AIR EX

Pros

• Wireless convenience: The dedicated transmitter removes the need for a standard guitar cable during practice.
• Flexible power: AC operation provides up to 35 watts, while battery operation supports portable playing.
• Stereo presentation: Two 5-inch speakers provide a wider experience than many single-speaker practice amplifiers.
• Built-in effects: Players can create complete tones without immediately purchasing separate pedals.
• Practice connectivity: Bluetooth, AUX IN, headphones, USB, and line outputs support practice, recording, and playback workflows.
• Compact format: The desktop design suits bedrooms, offices, teaching spaces, and small studios.

Cons

• Limited large-room headroom: Its compact stereo cabinet is better suited to practice and small spaces than loud full-band performance.
• Battery limitations: Battery operation provides lower rated output than AC operation and requires monitoring battery condition.
• Wireless dependence: The transmitter must remain charged, and wireless operation can be affected by distance or interference.
• Editing learning curve: Tone customization offers flexibility but may require time with BOSS Tone Studio and the owner’s manual.
• Desktop-focused design: Players who need a traditional floor amplifier, extensive physical controls, or high stage volume may prefer another category of guitar amp.

The boss KATANA-AIR EX Guitar Amplifier is best for guitarists who prioritize wireless practice, versatile tones, stereo playback, and convenient connectivity. A larger combo or powered speaker may be more appropriate for demanding live applications.