BOSS Katana 50 MKII EX 50w Combo Amplifier

BOSS Katana 50 MKII EX 50w Combo Amplifier



Order before 3pm Mon-Thu for Next Day Delivery

BOSS Katana 50 MKII EX 50w Combo Amplifier

Free delivery on this product

Retail Finance
Click and Collect

With the BOSS KTN50 MKII EX you get a 50 watt, stage-ready combo amplifier with expanded features from the critically-acclaimed Katana series.

Featuring GA-FC/GA-FC EX support, a versatile array of amp characters and variation, built-in BOSS effects, and much more besides, this compact powerhouse is perfect for aspiring performers and home recording artists alike.

Boss KTN50 MKII EX 50w Katana Combo w Ga-fc Functionality Key Features

  • Stage-class 50-watt combo amp with GA-FC/GA-FC EX Foot Controller support, Stereo Expand, and line output with cabinet emulation
  • Tube Logic design approach produces class-defying power, authoritative punch, and cutting presence
  • Five unique amp characters (Clean, Crunch, Lead, Brown, and Acoustic) and five variations for each
  • Five independent effects sections (Booster, Mod, FX, Delay, and Reverb) with three selectable variations in each
  • Dedicated Pedal FX for foot-controlled wah and pedal bend
  • BOSS Tone Studio software for customizing your sound with over 60 different BOSS effects, channel and global EQs, adjustable routing, and much more
  • Power Amp In for preamps, modelers, and multi-effects
  • Four Tone Setting memories for storing and recalling all amp and effect settings
  • Power Control for achieving cranked-amp tone and response at low volumes
  • Stereo Expand out to link with a second Katana MkII
  • Three Cab Resonance options (Vintage, Modern, and Deep) selectable in BOSS Tone Studio
  • Line, USB, and phones/recording outputs with mic’d cabinet emulation and three Air Feel settings (configurable in BOSS Tone Studio)
  • Optional GA-FC and GA-FC EX foot controllers provide complete amp control, including expanded Tone Setting selection, effects on/off, expression pedal control, and more
  • Connections for up to two footswitches or an expression pedal
  • Download and share Livesets at BOSS Tone Exchange
  • Pro setups available at BOSS Tone Central
  • Increased Sounds, Increased Versatility - Since their initial release a few short years ago, the BOSS Katana lineup has established itself as the go-to modeling amplifier for aspiring pro's, hobbyists, and relative beginners the world over. The Katana MKII builds upon the core tones of its predecessor to deliver a combo amp that truly soars far beyond its price class.
  • Five Amps, Ten Tones! - Whether you want to hear organic-sounding, vintage tube tones, something a little more modern and high-gain, or even a dedicated voice optimised for acoustics, the five primary amp characters on the Katana can take you there. These characters have now been extended with all-new voice variations, giving you an even wider palette of tones with which to paint your sonic landscape.
  • Five Simultaneous Effects - Another upgrade for the Katana MKII is the ability to now run a massive FIVE (yes, 5) effects categories at the same time, essentially giving you a decent-sized on-board pedalboard to play with. With 15 ready-to-play effects to choose from, and the ability to connect up to the BOSS Tone Studio for even more options, this amp is ready-made to help you customise your perfect sound, for any situation.
  • BOSS Tube Logic - For that full-throttle, authentic tube-amp sound, BOSS have included their incredible Tube Logic technology in the Katana MKII. This technology delivers the kind of authentic tube overdrive and distortion tones and characteristics we all know and love, but thanks to the amp's variable Power Control it can deliver those sweet spots even and bedroom volume levels!
  • Amplify Your External Gear - Whilst the Katana 50 MKII is superb as a standalone, practice-ready amp, you can also use it as a powered cabinet for your favourite preamp, modeler or multi-fx unit! Simply connect to the rear-panel Power Amp In jack, and the MKII's preamp is bypassed, allowing you to tap straight into the Tube Logic power section, complete with Power Control function!
  • Custom Setup, One-Touch Recall - Thanks to the inclusion of Tone Setting memories on the Katana MKII, you can recall your favourite amp and effects setups with ease. Simply dial in your preferred sound with the panel controls, then save it to the desired memory with a quick button hold, and away you go! The Katana MKII allows you to save 4 Tone Settings (two banks of 2), and you can quickly recall them again via the panel, or through using external foot controllers.
  • Stereo Made Easy - As if all of that wasn't enough the Katana 50 MKII EX features the Stereo Expand function, which allows you to link up two Katana MKII amps (apart from the 50w MKII) together for true Stereo sound. This is ideal for using stereo compatible effects, such as Chorus, Delay, Reverb, and more, giving you a wide, immersive sound field to work with.
  • Ready-To-Mix Direct Tones - With Line, USB, and phone/recording outputs at your disposal, the Katana MKII can be directly connected up to any PA System, DAW, or headphones. This sound can be shaped with three different Air Feel settings via the BOSS Tone Studio, and as two-channel USB operation is supported, you can track in true stero with many of Katana's on-board effects.
  • Compact Gig Commander - When used with the optional GA-FC or GA FX EX foot controllers (available separately) you can turn the Katana-50 MKII EX into the perfect gig companion on stages with minimal space available. These switches allow you to directly recall Tone Settings with ease, and independently turn the five effects sections on/off! As if that wasn't enough, the also support external footswitches and expression pedals, with customisation available through BOSS Tone Studio.
  • BOSS Tone Studio - The release of the Katana MKII also sees the evolution of BOSS Tone Studio. With an updated interface, faster workflow, and dedicated Pedal FX category, editing, storing, sharing, and downloading new setups for your Katana has never been easier. If you already own a BOSS Katana, it's worth noting that Tone Studio will allow you to import your custom patches into the MKII with ease!

Boss KTN50 MKII EX 50w Katana Combo w Ga-fc Functionality Specs

Rated Power Output

  • 50 W

Nominal Input Level

  • INPUT: -10 dBu (1 M ohm)
  • AUX IN: -10 dBu (20 k ohms)


  • 30 cm (12 inches) x 1


  • POWER switch
  • MASTER knob
  • POWER CONTROL switch (STANDBY, 0.5 W, 25 W, 50 W)
  • EQUALIZER: BASS knob, MIDDLE knob, TREBLE knob
  • MULTI EFFECT: BOOSTER button, MOD button, FX button, DELAY button, REVERB button, TAP button, BOOSTER knob, MOD knob, FX knob, DELAY knob, REVERB knob
  • TONE SETTING: CH1 button, CH2 button, PANEL button


  • MOD
  • FX
  • TAP
  • CH1
  • CH2


  • INPUT jack: 1/4-inch phone type
  • POWER AMP IN jack: 1/4-inch phone type
  • LINE OUT jack: 1/4-inch phone type
  • REC OUT/PHONES jack: Stereo 1/4-inch phone type
  • EXP PEDAL/CTL CH1/CH2 jack: 1/4-inch TRS phone type
  • GA-FC/CTL SOLO jack: 1/4-inch TRS phone type
  • AUX IN jack: Stereo miniature phone type
  • USB port: USB B type
  • AC IN jack

Power Consumption

  • 47 W

Dimensions (Include handle and rubber feet)

  • 470 (W) x 238 (D) x 398 (H) mm
  • 18-9/16 (W) x 9-3/8 (D) x 15-11/16 (H) inches


  • 11.7 kg
  • 25 lbs 13 oz


  • Owner's Manual
  • Power cord
  • GA-FC sticker
More Information
Manufacturer Boss
SKU 329304
Shipping Weight (kg) 13.000000
Colour black
Warranty 2 Years
Series Katana Series
Woofer Size 12" woofer
Power 50 Watts
Amp Type solid-state amplifier


We have a wide range of Delivery Options available, depending on the value of your parcel and budget. Select from our 2-3 Day Saver Service or our Next Working Day options at the Checkout.
This will include a text or email on the day of delivery giving you an exact hour window of when your gear will be with you, and the drivers name - just so you know when to turn the volume down!

  • Free Delivery Available on Selected Products
  • Weekend UK Mainland Delivery (Saturday-Sunday): £19.99
  • Small Items (Under 750g) Small items will be delivered by Royal Mail starting from 99p
  • Heavy Items (Over 30kg): Pallet Service Doorstep Delivery £65

For heavy items, courier details, out of stock products, out of area postcodes or international deliveries see our full Delivery info here.


Rather not wait in for the delivery? Don’t worry, we’ve got you…In Stock items can be ordered and paid for in-advance Online via our Click & Collect service. As long as if it's in stock at your chosen branch, you can collect the item within the hour.

Click here for more about our local Click & Collect Service.


If you and your item aren’t getting along, you have 14 days from when you receive the goods to contact our PMT experts either by phone or email to return your item.

*Please note: We cannot accept returns of microphones, any in-ear earphones, monitors, orchestral instruments with mouthpieces and any other items that touch your mouth, nose or inner ear if you have removed the hygienic packaging.

Click here for more information on Returns at PMT.

Online Orders

If you and your new item aren’t getting along, you have 14 days from when you receive the goods to contact our PMT Experts either by phone or email to return your item or organise an exchange for something more suitable.

Store Orders

If you've changed your mind about something you bought in-store, bring it back within 14 days of purchase and we'll be happy to exchange it for another product, a gift card or store credit.