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Line 6 JM4 Looper
Stompbox Modeler


Combining exhilirating jam tracks with sound-on-sound looping and a full arsenal of legendary Line 6 tones...
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List Price: $459.99
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Line 6 JM4 Looper
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Combining exhilirating jam tracks with sound-on-sound looping and a full arsenal of legendary Line 6 tones, the JM4 Looper features over 100 Endless Jam tracks and drum grooves in more than 10 styles performed by top LA and Nashville session players. These tracks aren't rigid and robotic; these are actual recordings laid down by A-list drummers, bass players and guitarists. The real-world chemistry from these dynamic rhythm sections is here for you to explore your creativity in writing songs, trying out solo ideas or just honing your chops between gigs.

With up to 24 minutes of recording time, and storage for up to 100 recorded jams, JM4 Looper lets you capture all your riffs and musical ideas. Plus, store more jams, export your jams to your computer's recording software and post jams online all through the SD card slot.

The looper has dedicated footswitches for Record/Overdub, Play/Stop, Half Speed and Undo for super-easy practicing, songwriting and creation of an entire backing band on the fly. Layer guitar tracks, bass tracks, keyboards - even vocals with the balanced XLR microphone input.

Complete with a comprehensive collection of brilliant modern and historic guitar tones, JM4 Looper gives you access to 200+ artist-created presets, 150+ song-based presets, 12 Line 6 amp models and a stunning array of effects for guitar and vocals. There's even room for 36 presets of your own creation.

JM4™ Looper offers an extensive collection of modern and historic guitar tones including 200+ artist-created presets, 150+ song-based presets, 12 Line 6 original amp models and a stunning collection of effects for guitar and vocals. There's even room for 36 presets of your own creation.


  • Clean -Crisp, shimmering clean tones and warm jazz tones.
  • Twang - Classic, glassy high-end with some snap and bite. Inspired by a Fender® blackface '65 Twin Reverb® and a blackface '64 Deluxe Reverb®
  • Blues - From gritty, swampy clean tones to syrupy smooth drive tones. Inspired by a mix of a '65 Marshall® JTM-45, a '58 Fender® Bassman®, a '63 Fender® Vibroverb and a Supro®
  • Crunch - Classic crunchy tone popularized by many early metal bands. Inspired by a '68 Marshall® Plexi 50-watt
  • Metal - Tight and punchy high-gain sound. Inspired by a Mesa Boogie® Dual Rectifier®
  • Insane - Famed and fearedbone-crushing, brain-piercing grind. Inspired by the Mesa Boogie® Dual Rectifier® red channel


  • Clean - Glassy clean tones like those from the late '60s/early '70s. Inspired by a '73 Hiwatt® Custom 100.
  • Twang- Swingin' rockabilly tone a la vintage tweed. Inspired by a '53 Fender® tweed Deluxe Reverb®, a '58 Fender® tweed Bassman® and a '60 Gibson® Explorer®
  • Blues - Early British rock tone made famous by the Beatles the Stones. Inspired by a fawn Vox® AC-30 with an updated and expanded tone control circuit
  • Crunch- The infamous brown sound inspired by a '68 Marshall® Plexi 100-watt with a few added extras: jumped input channels and a Variac transformer
  • Metal - Aggressive high-gain sound. The mid knob sweeps the tone spectrum: set to minimum for fuzz-pedal characteristics; set to noon for creamy, modern high-gain; crank it for Class A carnage
  • Insane - Short of a complete meltdown, as much input-gain distortion as possible while retaining tonal definition and character

Add depth, color and texture to your guitar tones and vocals with any of the pro effects included in JM4™ Looper. Spend more time playing and less time tweaking your guitar tone with Smart Control FX. Find the effect you want, turn the knob to the desired intensity and you’re done. Seven effects to choose from—use up to three at a time.

Smart Control FX:

  • Chorus/Flanger
  • Phaser
  • Tremolo
  • Delay (with Tap Tempo)
  • Tape Echo (with Tap Tempo)
  • Sweep Echo (with Tap Tempo)
  • Reverb

Guitar Sounds:

  • 200+ artist-created presets
  • 150+ song-based presets
  • 36 user-programmable presets
  • 12 Line 6 amp models from Clean to Insane
  • 7 Smart Control FX:
    • 1. Chorus/Flanger
    • 2. Phaser
    • 3. Tremolo
    • 4. Delay (with Tap Tempo)
    • 5. Tape Echo (with Tap Tempo)
    • 6. Sweep Echo (with Tap Tempo)
    • 7. Reverb
  • 3 tone controls:
    • 1. Bass
    • 2. Mid
    • 3. Treble
  • Integrated tuner

Vocal/Aux Sounds: Independent Mic/Aux input effects: 3-band EQ, Compressor, Delay and Reverb


  • 100+ Endless Jam™ tracks and drum grooves
  • Save up to 100 CD-quality recorded jams (totaling 24 minutes of recording time) internally
  • SD card slot for importing and exporting loops and recordings. (Supports up to 2-GB SD card for storage of up to 6.5 hours of recorded jams. SD card sold separately)
  • Dedicated footswitches for Record/Overdub, Play/Stop, Half Speed and Undo

Ins & Outs:

  • 1/4" instrument input
  • 1/4" aux input
  • XLR mic input with dedicated trim knob
  • 1/8" CD/MP3 input
  • 1/8" stereo headphone output
  • 1/4" mono guitar output
  • 1/4" stereo outputs

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