If you are after a modelling amp under €400 to play at home, our pick is the Boss Katana 50 Gen 3: the most versatile, the most dependable, and the only one here that could follow you into a rehearsal room the day playing in a band comes calling. But “best” depends above all on how you play: the Spark 2 is the most complete learning tool, and the Mustang LT50 the ideal way into a first combo. Here is our detailed comparison.

Comparison table

Amp Power Amp models Effects App ≈ Price Who it’s for
Boss Katana 50 Gen 3 50 W (1×12) 6 types, 2 variations each Over 60 Boss Tone Studio (computer) ≈ €299 The versatile choice, home and rehearsal
Positive Grid Spark 2 50 W stereo 33 43 Spark (mobile, very complete) ≈ €259 Learning and connected playing
Fender Mustang LT50 50 W (1×12) 20 25 Fender Tone LT (computer) ≈ €279 A first amp on a tight budget
Vox Cambridge50 50 W (1×12) 11 Essential modulations and reverbs Tone Room ≈ €267 Anyone chasing valve feel

Prices seen at Thomann on the date the article was updated; they can move.

How we chose

This comparison is a documented round-up: we cross-referenced spec sheets, public user feedback and, where they exist, our own reviews published on the site. Three criteria guided the selection, in this order: tone quality at household volume (that is where these amps will live 95% of the time), how easily you reach a good sound (an amp that demands twenty minutes of menus stays switched off), and real versatility: headphones, recording and possibly the ability to hold up in a band. All four amps are available new under €400, with proper European distribution.

Boss Katana 50 Gen 3: our pick

Three generations of Katana have made this series the benchmark among affordable modelling amps, and Gen 3 consolidates the gains. On paper the formula is unchanged: a 50 W combo with a 12-inch speaker, six amp types (including the new “Pushed” character, between clean and crunch, specific to this generation according to the spec sheet), each with two variations, and over 60 effects reachable through the Boss Tone Studio editor. The power control takes it down to 0.5 W to keep output-stage saturation at flat-friendly volume.

According to user feedback on Gen 3, the amp characters have gained further in naturalness, particularly on clean and crunch sounds — and the platform’s strengths, from convincing Brown high-gain tones to solid build quality, carry over.

The limits: the amp is mono, and while the four storable channels are driven from the front panel, deep effects editing calls for a computer. Nothing disqualifying for an amp that is also, alongside the Cambridge50, one of only two here that can face a rehearsal.

Who it’s for: the guitarist who wants a single amp for everything — living room, headphones, recording and the occasional band. Not for: anyone who wants to set everything from the sofa on a phone.

Positive Grid Spark 2: most connected

The Spark 2 is as much a practice companion as an amp. On paper the amplification side is serious: 50 W in stereo, 33 amp models and 43 effects inherited from the BIAS software, a built-in looper driven from the amp itself and a well-judged headphone output. But it is the Spark app that makes the difference: smart backing that follows your playing, automatic chord detection on a streamed track, and thousands of community presets you can load in two taps.

For making progress, jamming and exploring sounds without plugging anything in, no other amp on this list comes close.

The downside: without a smartphone and a Positive Grid account, you only use a fraction of the machine. The eight presets available from the front panel will do in a pinch, but the amp is designed with the app in hand. An optional battery, sold separately, makes it portable.

Who it’s for: the connected self-taught player, anyone practising with backing tracks and exploring tones. Not for: the app-averse, or anyone who wants a standalone amp above all.

Fender Mustang LT50: best first classic combo

The Mustang LT50 is the most recommendable entry point for anyone who wants a proper combo with a 12-inch speaker without breaking a tight budget. The Fender recipe: a deliberately simple interface, a small colour screen, one encoder, and factory presets covering the classic registers (Fender cleans first and foremost, and logically well done, according to user feedback). Twenty amp models and 25 effects combine freely, and the USB output records straight into software with no audio interface.

According to user feedback, clean and lightly crunched tones are the amp’s strong suit, while heavier gain proves less convincing than on a Katana. At this price the trade-off makes sense: the LT50 does the essentials well and speaks to the beginner or the returning player, not the metal tone-hunter.

Who it’s for: a first amp, a tight budget, a lover of Fender cleans. Not for: the metal player, or anyone wanting a full-featured mobile app.

Vox Cambridge50: most valve-like

The Cambridge50 plays a card no one else here holds: its preamp carries a Nutube, the miniature low-consumption valve developed by Korg, which brings a compression and attack response that pure modelling struggles to reproduce. According to the spec sheet the rest follows: 50 W, a 12-inch Celestion speaker (rare under €300), a model selection obviously centred on the VOX AC30 and AC15 but not limited to them, and the Tone Room app for editing.

According to user feedback, this is the amp here that delivers the playing sensations closest to a valve amp: the dynamics respond convincingly to the guitar’s volume control and to pick attack. In return, the effects section stays basic next to a Katana or a Spark 2, and the software ecosystem is less lively.

Who it’s for: the player who cares about touch and dynamics, the British-tone lover. Not for: anyone wanting a large library of effects and community presets.

The over-budget mention: Yamaha THR30II Wireless

The THR30II Wireless would have deserved a place here, but at around €469 at Thomann it goes past this comparison’s ceiling. It remains a benchmark for playing at home: designed from the ground up as a desktop amp, with 30 W in stereo, 15 guitar amp models (plus 3 bass models and 3 mic models for acoustic), a built-in battery, Bluetooth and an onboard wireless receiver. If your guitar never leaves the living room and the budget can stretch, it offers, to our ears, the best low-volume sound in its class.

What to know before buying

Think use case, not wattage. A 50 W modelling amp is not there to play louder at home, but to keep clean headroom. The real question: will you ever play with a drummer? If so, you need a 12-inch combo (Katana, Mustang, Cambridge). If not, a desktop amp like the Spark 2 will sound better at living-room volume.

Check your tolerance for apps. The Spark 2 without a smartphone loses most of its point; the Katana and Mustang are edited on a computer; the Cambridge50 stays very usable from the front panel. Choose according to how you actually enjoy dialling in a sound.

Think about headphones and recording. If you play late at night or record demos, the quality of the headphone output and the presence of USB audio weigh more than the tenth amp model. On that ground, the Spark 2 leads.

Verdict

For most guitarists the Boss Katana 50 Gen 3 is the safest choice under €400: convincing tones, a platform matured over three generations, and versatility that will keep up as your playing evolves, from the living room to the rehearsal space. The Spark 2 is the best teacher of the bunch, the Mustang LT50 the first combo to recommend on a tight budget, and the Cambridge50 the surprise for anyone unwilling to give up the feel of a valve amp. And if your guitar will never leave the house, the Yamaha THR30II justifies stepping outside this comparison’s brief, provided the budget stretches past €400.

Article published on 14 January 2026. Prices are indicative, seen at Thomann, and can change.