- Boss releases the Katana-25, a compact 25 W guitar combo that opens the Katana range to guitarists who are beginners or returning to the instrument.
- The Power Control switches the amp from 25 W to 0.5 W: you keep a pushed sound at apartment volume, even late at night.
- Six amp characters, from clean to high-gain, plus a setting designed for electro-acoustic guitars, and more than 60 Boss effects with five usable simultaneously.
- Bluetooth, tuner, headphone output and USB-C class-compliant: it works just as well for practicing with backing tracks as for recording without a mic.
We've seen the Katana evolve through generations, from the MkII to the Gen 3, from the small Mini X to the 100 W head. The name has become a staple among guitarists for a simple reason: you plug in, you play, and the sound holds up. With the Boss Katana-25, the brand sets a new first step in this range. A guitar combo with 25 W and an 8-inch speaker, designed for daily playing at home.
On paper, it takes what made the Katana famous: Boss’s Tube Logic philosophy, which seeks the feel of a tube amp rather than just an EQ curve. It adds what you expect today from a practice amp: Bluetooth, USB-C recording and an editing app. Here’s a rundown of this small combo, control by control.
The Katana-25 keeps a clear front panel: gain, volume and 3-band EQ, a Tone Setting section to recall ready-to-play sounds, a Tap Tempo button and a tuner always at hand.
Behind this simplicity, the dedicated app opens deep editing, preset saving and sharing settings with the community.
Specifications - Boss Katana-25
| Type | Modeling guitar combo (Boss Tube Logic philosophy) |
|---|---|
| Power | 25 W (analog power) |
| Power Control | 25 W · 0.5 W |
| Speaker | 1 x 8 inches (custom) |
| Amp characters | 6 characters and their variations, from clean to high-gain brown sound type, including one dedicated to electro-acoustic guitars |
| Effects | More than 60 Boss effects, up to 5 simultaneously |
| Controls | Gain · Volume · 3-band EQ · Tone Setting · Tap Tempo |
| Tuner | Built-in |
| Connectivity | Bluetooth USB-C class-compliant Headphone output |
| Editing | Dedicated app, Session function |
| Finish | Black tolex |
| Verdict |
Pros
Worth noting
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The sound of the Boss Katana-25, from clean to brown sound
The heart of the Katana-25 is its six amp characters and their variations. They cover a very wide range, from clear, open clean tones to dense saturations of modern high-gain sounds.
In clean, the sound remains defined, with air around the notes. This is the territory of rich chords, arpeggios and modulations, the world of pop, funk and indie. Think of Nile Rodgers’ clean parts or the chorus arpeggios of indie bands: the amp follows.
In crunch, the grain becomes more nervous and highlights pick attack without hardening the sound. Rock and blues find their place here. Turn up the gain and the saturation thickens progressively, up to what Boss calls the brown sound, that warm and cutting grain popularized by Eddie Van Halen. Riffs stay clear, solos sing, even at moderate volume.
This is where Tube Logic comes in. The amp reacts to your right hand: play softer and the sound brightens, attack harder and the saturation builds. This dynamic is what makes you want to stay on the instrument for an extra hour.
The Power Control acts on the amp’s power, not on its overall volume. In the 0.5 W position, the amp keeps the character of a pushed sound, with its natural compression and saturation, but at a sound level compatible with an apartment. This is the key to playing a stage sound at 11 p.m. without waking the building.
A small Boss combo that sounds bigger than it is
An 8-inch speaker is a compact format. Boss had it custom developed and paired it with a carefully crafted cabinet to give the sound breadth. The announced result: a surprising low end for this size, and a present midrange that keeps the guitar front and center.
The 25 W is enough for the living room, sound work and rehearsals at reasonable volume. The cabinet stays compact and light: it fits under a desk or at the foot of the couch, and moves from room to room effortlessly.
For those who need more power, the range continues above with the Katana 212 Gen 3 at 100 W or the Katana Head Gen 3. And to play without mains power, the Katana Mini X runs on a rechargeable battery.
A complete pedalboard inside the Katana-25 amp
With more than 60 Boss effects, the Katana-25 carries the equivalent of a nice collection of effects pedals: modulations, delays, reverbs, chorus, flanger, phaser. You can chain up to five at once, enough to build a full chain without putting anything on the floor.
The Tone Setting section lets you switch from one sound to another without breaking the flow. A clean with chorus for the verse, a crunchy rhythm for the chorus, a saturated lead for the solo: each sound is recalled instantly.
Before starting a track with delay, tap the tempo on the Tap Tempo button following the backing track's drums. The delay repeats then fall in rhythm, and the sound gains presence without muddying your playing.
Another string to its bow: an amp character dedicated to electro-acoustic guitars. It preserves the clarity and articulation of the acoustic, without excessive compression or saturation. If you switch between an electric and a folk equipped with a pickup, one amp is enough in the room.
Practice, jam, record with the Katana 25
The Katana-25 quickly becomes a workstation. The built-in Bluetooth streams audio from your smartphone or tablet into the amp: you play over a track or backing track, with the same speaker for both.
The Session function goes further. You play with videos, and the amp automatically switches Tone Settings during playback. The sound changes at the right moment in the song, you stay focused on your hands.
For recording, the class-compliant USB-C port sends the amp's sound directly to a computer or mobile device, no driver needed. No mic to place in front of the speaker: you plug in, open your software and record your take.
For silent practice, the headphone output remains available at all times. A closed studio headset gives you an accurate sound return while isolating your surroundings.
Start by exploring the sounds in the Tone Setting section directly on the amp. Once you know your way around, open the app to fine-tune a preset and save it. You progress at your own pace, without being overwhelmed by settings on day one.
FAQ - Boss Katana-25
Is the Katana-25 suitable for playing in an apartment?
Yes. Power Control reduces the amp from 25 W to 0.5 W, which keeps a pushed sound at low volume. The headphone output also lets you play silently.
Can you record your guitar with the Katana-25?
Yes. The class-compliant USB-C port sends the sound directly to a computer or mobile device, no mic in front of the speaker.
Does the Katana-25 work with an electro-acoustic guitar?
Yes, an amp character is set for electro-acoustics. It keeps the instrument's clarity and articulation, without excessive compression or saturation.
How many effects can you use at the same time?
The Katana-25 offers over 60 Boss effects and accepts up to five simultaneously, allowing you to build a full chain of modulations, delays and reverbs.
Do you need the app to use the Katana-25?
No. Gain, volume, 3-band EQ, Tone Setting, Tap Tempo and tuner are accessible on the front panel. The app is for deep sound editing, saving presets and using the Session function.
The Boss Katana-25 packs into a small box what makes the range successful: a sound that responds to your playing, immediate handling and plenty of room to improve. For a first amp or a return to guitar, it ticks the boxes for playing at home. And the day the band forms and volume needs to rise, the rest of the Katana family waits above, with the same landmarks.
