With Katana Gen 3, BOSS pushes its acclaimed stage amplifier series even further, evolving the platform with enhanced Tube Logic technology for richer sound, greater feel, and more expressive response. The Katana-50 EX Gen 3 combines these sonic improvements with live performance upgrades, making it an indispensable tool for gigging guitarists, studio players, and dedicated hobbyists.

Signature Tube Logic Sound and New Amp Characters

At the heart of the Katana-50 EX Gen 3 is BOSS’s advanced Tube Logic architecture, which meticulously recreates the complex dynamics of a tube amp at a component level. This generation introduces a new “Pushed” amp character alongside the classic Clean, Crunch, Lead, Brown, and Acoustic voices, each with selectable variations that provide 12 unique tones to suit any style. Whether you crave the warm, harmonic saturation of a cranked tube amp or sparkling cleans, this amp delivers.

Enhanced Speaker and Power Control for Stage Performance

Compared to the standard 50-watt Katana, the EX version boasts a custom 12-inch Boss speaker optimized for greater projection and resonance on stage. The reactive Class AB power section maintains rich tube-like responsiveness even at high volumes, while integrated Power Control allows you to dial in cranked amp tone and feel at lower output levels—ideal for bedroom practice or small gigs without sacrificing tone.

Robust Effects and Deep Customization

Five simultaneous effects sections — Booster, Modulation, FX, Delay, and Reverb — are loaded with essential BOSS effects, plus three variations each for 15 distinct options. The BOSS Tone Studio software (Windows/macOS) unlocks over 60 additional effects, letting you customize parameters, reorder effects, and save your favorite presets remotely via USB or Bluetooth® (with the optional BT-Dual Adaptor). The updated Tone Studio interface is faster, more intuitive, and offers graphic customization for seamless tone crafting.

Features

• Four onboard Tone Setting memories for instant recall of amp and effects setups
• Support for GA-FC and GA-FC EX foot controllers for comprehensive stage control
• Stereo Expand functionality to link two amps with master control and stereo effects distribution
• Power Amp In jack for use as a power amp with external preamps or modelers
• Line Out jack for direct connection to PA systems with IR-based cabinet simulation
• Headphone output with cab emulation for quiet practice
• USB-C connectivity for recording and direct computer integration with IR speaker simulation
• Aux input for jamming along with music players or backing tracks

Specs

• Type: Solid State Modeling Amp
• Output Power: 50W (with 25W and 0.5W power settings)
• Speaker: 1 x 12" Boss Custom Katana 100W
• Amp Models: Acoustic, Clean, Pushed, Crunch, Lead, Brown
• EQ: 3-band EQ, Presence, Contour switch
• Effects: 5 simultaneous effect blocks, 15 effect variations, 60+ effects via Tone Studio
• Inputs: 1/4" instrument, 1/4" power amp in, 1/8" aux in
• Outputs: 1/4" line out, 1/4" headphone out
• USB: USB-C for Tone Studio and recording
• Bluetooth: Compatible with BT-Dual Adaptor for wireless editing
• Footswitch: 1/4" GA-FC and expression pedal inputs
• Dimensions: 18.56" W x 15.68" H x 9.37" D
• Weight: 25.81 lbs