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Line 6 TonePort KB37 USB Audio Interface and MIDI Controller

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The Line 6 TonePort KB37 is from the award-winning TonePort family of USB recording and modeling audio interfaces from Line 6. With it you can record your guitar and vocals with renowned Line 6 sound ... Click To Read More About This Product

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The Line 6 TonePort KB37 is from the award-winning TonePort family of USB recording and modeling audio interfaces from Line 6. With it you can record your guitar and vocals with renowned Line 6 sound and add a few choice keyboard parts to top off your compositions. The TonePort KB37 gives you 37 full-sized synth-action keys, pitch/mod wheels, assignable transport controls, an expression pedal input, and the same dual footswitch jacks as the UX2 for control of effect on/off, tone select, tap tempo, and other parameters as well as sustain, start/stop, and punch in for your MIDI/music recording software.

18 guitar and five bass amp/cab models; 30 stompbox and studio effects; and six high-end studio microphone preamp models deliver professional Line 6 sound to all your recordings. You can record through two mic inputs (with 48V phantom power), a guitar/bass input, and stereo line inputs. Other I/O includes a S/PDIF out, TRS line outputs, TRS monitor input, and independent headphone jack. It also gives you assignable VU meters and selectable 16- or 24-bit recording at 44.1, 48, or 96kHz. A real breakthrough is the Tone Direct™ monitoring, which lets you hear the signal with full Line 6 processing and zero latency. And all of it is now compatible with Macintoshes as well as PCs.


TonePort KB37 Hardware Specs:
  • 37-note full-sized keyboard
  • Pitch and mod wheels
  • Assignable transport controls
  • Expression pedal input
  • Dual footswitch jacks
  • 18 guitar and 5 bass amp/cab models
  • 30 stompbox and studio effects
  • 6 high-end studio microphone preamp models
  • 2 mic inputs with 48V phantom power
  • Guitar/bass input with pad
  • Stereo line inputs
  • S/PDIF digital output
  • Line outputs via balanced 1/4"
  • Monitor input via stereo 1/4" jack
  • Headphone jack with dedicated volume knob
  • Assignable VU meters
  • Tone Direct monitoring
  • 16- or 24-bit recording at 44.1, 48kHz
  • 96kHz mode with built-in sample-rate conversion for simultaneous input and output
  • Mac and PC compatible
GearBox Modeling SoftwareSpecs
    Guitar Amp Models from PODxt
    • Small Tweed (based on* "Wide Panel" Fender Deluxe Reverb)
    • Tweed B-Man (based on* Fender® Bassman)
    • Blackface 'Lux (based on* Fender® Deluxe Reverb)
    • Class A-30 Top Boost (based on* Vox AC-30)
    • Plexi Lead (based on* Marshall Super Lead)
    • Plexi Jump Lead (based on* Marshall Super Lead with "jumped" channels)
    • Jazz Clean (based on* Roland JC-120)
    • Brit J-800 (based on* Marshall JCM-800)
    • Solo 100 Head (based on* Soldano SLO-100)
    • Treadplate (based on* Mesa/Boogie Dual Rectifier)
    • Tube Instrument Preamp
    • Line 6 Treadplate
    • Line 6 Insane
    • Line 6 Spinal Puppet
    • Line 6 Chemical X
    • Line 6 Piezacoustic 2
    Bass Amp Models from Bass PODxt
    • Rock Classic (based on* Ampeg SVT)
    • Flip Top (based on* Ampeg B-15A)
    • Adam and Eve (based on* Eden Traveler WT-300)
    • Silverface Bass (based on* 1967 Fender Bassman Head)
    • Eighties (based on* Gallien Kruger 800RB)
    Stompbox and Studio Effects
    • Facial Fuzz (based on* Fuzz Face)
    • Fuzz PI (Based on* Big Muff Pi)
    • Screamer (based on Tube Screamer)
    • Classic Distortion (based on* ProCo Rat)
    • Vetta Comp
    • Line 6 Sine Chorus
    • Line 6 Flanger
    • Phaser (based on* MXR Phase 90)
    • U-Vibe (based on* Uni-Vibe)
    • Opto Tremolo (based on* 1965 Fender Deluxe Reverb®)
    • Rotary Drum & Horn (based on* Leslie 145)
    • Analog Delay Modulation (based on* Deluxe Memory Man)
    • Tube Echo (base on* EP-1 Tube Echoplex)
    • Line 6 Digital Delay
    • Standard Spring Reverb
    • Brite Room Reverb
    • Medium Hall Reverb
    • Cavernous Reverb
    • Slap Plate Reverb
    • Wah (based on* Vox Wah)
    • Volume (Pre- or Post-Amp Routing options)
    • Compressor (based on* LA-2A Compressor)
    • Noise Gate
    • Female De-Esser
    • Male De-Esser
    GearBox Exclusive Vocal Preamp Models:
    • American Classic (Inspired by* an API lunch box preamp) in a classic studio setup:
    • API 512c Mic Pre
    • API 550b EQ
    • Studer 2-inch tape (Including Emphasis/De-emphasis & tape Soft Clip)
    • This model gives you classic rock tone that's focused and a bit compressed through soft distortion. It even includes the treasured tonality and saturation you'd get when recording to classic 24-track analog tape! Good for transients and maintaining a leveled vocal.
    • Vintage UK Inspired by* a Neve 1073
    • Warm with mild distortion when pushed. Vintage UK handles transients very well and is great for vocal tracking. Extended bass range also makes it great for direct bass and drum work.
    • Modern (Inspired by* an Avalon Vt737)
    • This modern must-have has a clean, bright, and non-compressed sound with soft transients.
    • Console (Solid State Console Mic Pre Design)
    • Has a flat frequency response that's clean with no artifacts or colorization. A great choice for tracking line level instruments like a keyboard.
    • Vintage (Inspired by* a Classic Vintage Tube Preamp setup) consisting of:
    • Requisite Y7 Mic Pre
    • API 550b EQ
    • Studer 2-inch tape (Including Emphasis/De-emphasis & tape Soft Clip)
    • This model yields vintage Motown, Memphis, Nashville, and early rock sounds.
    • Lo-Fi
    • Has a small speaker sound that's slightly distorted. Great for adding an overdriven vocal to a track.
    • * All product names used in this document are trademarks of their respective owners, which are in no way associated or affiliated with Line 6. These trademarks of other manufacturers are used solely to identify the products of those manufacturers whose tones and sounds were studied during Line 6 sound model development.
    • Customer Reviews

    Review Snapshot

    by PowerReviews

    (based on 5 reviews)

    Ratings Distribution

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    • 1 Stars



    Reviewed by 5 customers

    Displaying reviews 1-5

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    (10 of 10 customers found this review helpful)


    Good piece of equipment

    By MusicFortheMasses

    from Corona, CA

    I got the KB37 after reading a lot of reviews, which said both good and bad. For someone who wants a home recording studio via PC, it works great. I would say don't upgrade the ableton to version 6 until they work out all the bugs, I did and it stutters a lot. A problem I did not find with the version 5 that came with the product.

    (9 of 15 customers found this review helpful)


    just ok

    By rossincasper

    from Casper, WY

    This product just wasn't for me. I returned it after finding it isn't a true 24/96 platform. It is incompatable with Acid Pro 6. It is hard to figure out how to use, no written manual. And is not the easiest setup. Pretty flimsy. Don't reccomend for a interface with a DAW.


    Can't beat the price for the capability!

    By Bob

    from Fairfax

    Good build-quality. Midi-controller works seamlessly with Cubase and Garageband. Up and recording in less than an hour out of the box. Gearbox is versatile and guitar effects sound great. I strongly recommend the KB37 for the small at-home studio.


    A great addition to the home studio!

    By Mike Hall

    from McPherson, KS

    The KB37 has been a marvelous addition to my home recording studio. The GearBox software is positively brilliant, the USB interface sounds clean and clear, and the keyboard is surprisingly playable. Personally, I found the bundled-in Ableton software to be clumsy and crude, but that's irrelevant...the KB37 will work with other recording software, so you can choose for yourself if Ableton isn't your cup of tea. Be advised that the KB37 doesn't come with virtual instruments; if you're new to MIDI, know that if you want to use the keyboard (and your recording software of choice doesn't include virtual instruments) you'll need to get some. The bottom line is that the KB37 is a terrific piece of gear that opens a million creative doors for the home recorder on a budget. I've even used this thing as an interface for my drum mixer!


    This thing is sweet

    By A Heartthrob in Disguise

    from Hollywood FL

    I bought this thing for the 24/96 and the MIDI keyboard. I didn't think I was going to use the guitar and bass models, but they're something else. I recorded a simple funk/rock groove with Addictive Drums and the KB37's keyboard, and added a bass line and 2 guitars. NO FIDDLING WITH EQ INSERTS. Just pan one guitar a bit left and one a bit right, and EVERYTHING FELL INTO PLACE! An old-school type from the days of tape told me that if you get all your levels right, you shouldn't have to do much in the mix at all. The guitar had punch but didn't muddy the bass and stayed back in the mix like it was supposed to. The bass had boom but didn't crowd the kick. This thing is awesome and the models are sooooo versatile. Not to mention you can put 2 footswitches and an exp pedal into it. Only con: haven't quite figured out how to set up the transport controls yet.

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