Consistent Connectivity

“To A and B or not to B – that is the question.” Enrico Shakespeare, ye-olde scribe of Berlin

An ABY box is not something that will set the world on fire. We know that. But what a good ABY box can do, is start a flame that’ll fully ignite your creativity, and our new ABY pedal is a REALLY GOOD one. Expertly built, noise-free, gorgeous looks AND affordable – it just ticks all the boxes.

Whether you’re looking to switch or combine your mono input signal using two separate outputs, or switch or combine two separate input signals into one output, the KMA Machines ABY pedal is a dependable little helper for your tonal quest. Created with a focus on durability, reliability, simplicity and hassle-free operation, this passive ABY switcher also features True Bypass active silent relay-based soft switching to reduce mechanical noise and unwanted pops and clicks when in use. So, all you have to do is choose your path and perform!

Main Features:

  • Passive ABY pedal with active switching
  • Sends an input to two separate outputs, separately or combined
  • Sends two inputs to one source, separately or combined
  • True Bypass
  • Active silent relay-based soft switching, heavily reduces mechanical noise and pops
  • Omnidirectional for 2 into 1 or 1 into 2 operation
  • Distinct LED colours, to indicate your selected signal path at a glance
  • Durable compact enclosure for years of reliable switching
  • Top-mounted jacks, will fit into any setup
  • Made in Berlin, Germany

Need to work in Stereo? The the KMA STEREO ABY is for you!

Introducing ABY

Quick Control Overview

Hover over control points for detailed info

Quick Control Overview

Click on each control point for detailed info


Product Type:

Passive ABY pedal with active switching

Bypass Type:

True Bypass

Power Supply Requirements:

9 V DC – Centre (-) negative 2.1mm

Current Draw (max):

>40 mA

Product Dimensions / Weight:

H: 56 mm / 2.21 inch
W: 112 mm / 4.41 inch
D:  65 mm / 2.56 inch
Weight: 185 g / 6.53 ounces



In-depth Description

KMA’s ABY pedal features a fully passive design for the best signal integrity, along with our True Bypass active silent relay-based soft switching.

While that might be a hell of a wordy mouthful, what it means practically is that the audio signal itself is entirely untouched and without any colouration.

Plus, you can use the device in either direction, for sending to different sets of amps or effects or for switching inputs/ instruments/devices into your chain. However, the actual switching is taken care of by our reliable and sturdy soft switches as a separate active circuit.

Switch Away

Switch Away

By employing this switching technology, mechanical noise is greatly reduced, as is the risk of those pesky loud clicks and pops that have plagued so many boards and has haunted so many musicians, since the inception of ABY boxes.


Colour Your World
Colour Your World

The bears eyes light up – how awesome is that!? Okay, besides just looking cool and fulfilling our boyhood dreams of an army of robot bears with freaking lasers as eyes, the 3 distinct LEDs actually serve a practical purpose; to quickly and easily show you what signal path you’ve selected at a glance.

Red for A, Yellow for B and Blue in the centre for A&B.

This pedalboard-friendly device seamlessly integrates with your existing setup. It’s compact, rugged, lightweight, durable, affordable and can be powered via a standard 9V DC power supply, making it convenient for all walks of sonic life. What’s not to like?

So, will you choose A or B?

With the KMA Machines ABY pedal, the fate of your signal is in your hands!

Buy Now

Online ABY Dealers in the USA & Canada:

Chicago Music Exchange  Vintage King

Alternatively, find your local dealer HERE or purchase ABY direct from the KMA webshop:



Price excl. local Sales Tax. Shipping calculated at checkout.