EAE StompMix X4-2 Battery Powered Compact Digital Mixer Pedal

EAE StompMix X4-2 Battery Powered Compact Digital Mixer Pedal

Battery Powered 4 Channels Compact digital Mixer Pedal

StompMIX X4-2 - Battery Powered 4 channels Compact Digital Mixer Pedal

The StompMix X4-2 Compact Digital Mixer Pedal is battery powered,  built with a powerful 32-bit 100Mhz DSP engine and a compact lightweight stomp box package.  The StompMix X4-2 offers a full featured, highly intuitive four channels Digital Mixer with a Color Display.  The DSP engine provides a compressor, Mid sweepable EQ, Highpass Filter, Notch Filter, Phase reverse to each of the 4 inputs. Analog inputs consisted of 2 Class A solid-state Mic pre-amps with +48V Phantom power and two 1/4″ TRS inputs.  Two sets of stereo Mix outputs are selectable between 2 1/4″ Balanced TRS jack and 2 XLR Balanced jacks .  2 Footswitches with assignable functions.


“ The StompMix 4 is a Game Changer for Acoustic Guitarists using multi-sourcepickup systems. It’s a feature rich mixer pedal that fits in your hand ”


Don Alder - Multi-Award Guitarist

“The mixer that I had been looking for so many years. It has exactly what I love about a good stomp pedal: It’s user-friendly and it has a great sound.”

“La consola de piso que estuve buscando por muchos años. Tiene todo que lo que me encanta que tenga un buen pedal de efectos: es fácil de programar y tiene un gran sonido.”


Daniel Fraire

Some Screen Shots from the StompMix 4 DSP engine. We may update our firmware to add functions as we get feedback from our customers.

StompMix X4 -2 Battery Powered 4 Channel Digital Pedalboard Mixer Features

  • 4-Channel Compact Digital Mixer Pedal
  • LFP Battery Powered.
  • 10 user scene memories.
  • Color display
  • Input Level Monitoring
  • 2 Class-A Mic inputs with TRIM and PAD –  INSTR/(LINE-MIC)  selectable (CHAN 1 and 2)
  • 2 High Z inputs with TRIM (CHAN 3 and 4)
  • +48V Phantom Power
  • Independent Reverb effect on each channel
  • 2 notch filter available on each channel
  • High Pass Filter and Phase Reverse on each channel
  • Noise Gate and Compressor on each channel
  • 3 Band EQ with Sweepable MID on each channel
  • Max 1 second Delay with Tap Tempo (assign to one Channel at a time)
  • Assignable Footswitch functions (MUTE channels, EFX by-pass, Tap Tempo, Scene change etc)
  • Output 1 (XLR jacks)  – Balanced
  • Output 2 (2 x  TRS jacks) – Balanced
  • 1/8″ TRS Headphone Output
  • 1/8″ TRS AUX input
  • Main MIX and AUX MIX
  • Scenes Change  – via Footswitches.
  • Diecasting Metal chassis
  • AC/DC power supply included
  • 12VDC power supply/Charger  (2A 2.1mm *Center Positive*)
  • Designed and assembled in USA


Shimmer Reverb and Delay setting (multiple-pickups) – short clip below

StompMix 4 Pedalboard Mixer Videos

Save/Recall Scenes – short clip below

This video shows how to Save and Recall Scene. There are 2 ways to recall scenes on the StompMix 4. Using the A or B footswitches or using the Recall Button.

If using A or B to recall scenes, the A and B footswitches must be assigned to M+ M- (page 12 of the user manual)

When using the Recall Button – ONLY a quick press is needed, DO NOT hold the encoder button.

“The StompMix 4 is a game changer for anyone using multiple pickups in a single guitar. The StompMix allows me to run up to 4 separate signals into it and have full control over the volume/effects/EQ of each input, ideal for on-the-fly adjustments when playing on stage.”

Sean de Burca – UK Guitarist

Sean de Burca

StompMix X4-2 Pedalboard Mixer Frequent Questions and more


  • 1) Can unit operate while charging the StompMix X4-2?
  • – Yes, StompMix X4-2 can operate while charging.
  • 2) Can I plug Passive Pickups directly into the StompMix X4-2?
  • – Yes,  Passive pickup systems work with the StompMix X4-2. Instrument Inputs are available.
  • 3)  Too Much Hiss on the outputs?
  • – Make sure the GAIN level knobs for Chan 1 and Chan 2 are NOT at MAX.
  • – Reduce the MIX input level to be about 12 o’clock for each channel.
  • – Check for possible Ground Loops
  • – Make sure output is “NOT” going into High Impedance Inputs on your Amplifier or PA system. Outputs from StompMix X4-2 should be connected to Line Inputs on the Amplifier or PA system.
  • 4) Can Delay be used on all channels at the same time?
  • – No, Delay can only be used one channel at a time. It is assignable.
  • 5) Can Chan 3 and 4 be used for Guitar with Passive Pickup?
  • – Yes. Most Passive Pickup systems will work. We recommend using Chan 1/2 INSTR inputs for Passive pickups.
  • *** CHAN 3 and CHAN 4 (TS jacks) *** we don’t recommend these inputs to be used with very low output Passive Pickups.
  • 6) Should I use MONO cable or Stereo Cable for the 1/4″ outputs?
  • use Stereo Cables where possible *** OUTPUT 2 L/R (TRS jacks) *** these are LINE level outputs, not recommend to connect to High Impedance Input.
  • 7) How do I set the EQ on each channel?
  • – click the Encoder Knob to access the EQ settings.
  • 8) Does StompMix X4-2 support Tap Tempo?
  • – Yes.
  • 9) Digital noise on outputs
  • – Check for possible Ground Loops.
  • 10) How long does the battery last
  • – LFP batteries can last up to 3000+ cycles.
  • 11) Not getting scenes changes with M+ M- footswitches. 
  • – Check and make sure 2 or more Scenes are saved.
  •  12) Recall Button on Memories page not working. 
  • – A Quick Press (or Tap) is required, DO NOT hold the encoder button.
  • 13) Can EFX be muted on all channels with one footswitch press. 
  • – yes, A/B footswitches needs to be assigned to “1-4 EFX”.   (Footswitch A will Mute all 4 channels and B will bypass EFX) – page 12 of user manual.
  • 14) What is playtime on a full charge
  • – about 5-6 hours
  • 15) is Updater available for MAC. 
  • – it is not available at this time.
  • 16) Can the Main Mix MONO and Aux Mix MONO be sent out via 1/4″ TRS jacks or the XLR jack?
  • – Assign out1 or out2 with “M< >A”, MAIN Mix MONO is sent to XLR LEFT output and AUX mix MONO is sent to XLR RIGHT output. (page 13 of user manual)
  • 17) AUX Mix doesn’t have Reverb.
  • – That is correct, only “MAIN mix” have Reverb added. There is no option to add Reverb to the “Aux Mix”.
  • 18) Can I get Reverb to Output 2 (TRS jack)
  • – yes, “Main Mix” can be assigned to Output 2. (page 12 of user manual)
  • 19) AUX Mix level is linked to “Main Mix” level. 
  • – “Aux Mix” level can be assigned “Pre” or “Post” the “Main Mix” level. to make it independent, change setting to “Pre” (page 7)
StompMix 4 - V1.02 - 3 user manualStompMix 4 - Block Diagram

High Resolution Pictures:

StompMix 4 - Top ViewStompMix 4 - Rear View