KMA Machines Stereo ABY Passive Stereo ABY Pedal

The KMA Machines STEREO ABY is a compact, reliable, and noise-free stereo ABY switcher pedal, designed to give you total control over your stereo rig. Whether you need to send a stereo input to two destinations, or combine two stereo inputs into one output, the STEREO ABY makes switching effortless, silent, and transparent.

With its passive audio path and active relay-based soft switching, your tone stays completely untouched, free from clicks, pops, or coloration. Add in top-mounted jacks, rugged build quality, and distinct multi-colour LED indicators, and the STEREO ABY becomes the perfect utility pedal for guitarists, bassists, and synth players who demand reliability and clean signal management in stereo.

Main Features

• Passive Stereo ABY Pedal with Active Switching – transparent, noise-free operation
• 1-to-2 or 2-to-1 Stereo Routing – send a stereo input to two outputs, or combine two inputs into one output
• True Bypass Design – preserves natural tone integrity
• Silent Relay-Based Soft Switching – eliminates mechanical noise and pops
• Omnidirectional Functionality – works both ways, in full stereo
• LED Indicators:
  • Red = A
  • Yellow = B
  • Blue = A & B combined
• Durable Compact Enclosure – road-ready build for years of use
• Top-Mounted Jacks – saves space on your pedalboard
• Handmade in Berlin, Germany
• Power: 9V DC (centre -, 2.1 mm, >40 mA, PSU not included)

Why Choose the STEREO ABY?

• Perfect for Stereo Rigs: Route stereo pedals or synths to multiple destinations with ease.
• No Tone Loss: Passive signal path ensures your sound stays pure and unaffected.
• Silent Switching: Relay-based soft switches eliminate unwanted pops and clicks.
• Quick Visual Feedback: Multi-colour LEDs make it easy to see your signal path instantly.
• Pedalboard-Friendly: Compact, rugged, and powered via standard 9V DC.

Specifications

• Type: Passive Stereo ABY Switcher with Active Relay Switching
• Operation: Stereo 1-in > 2-out / Stereo 2-in > 1-out
• Indicators: Multi-coloured LEDs (Red, Yellow, Blue)
• Bypass: True Bypass with silent soft relay switching
• Power: 9V DC, >40mA current draw (PSU not included)
• Enclosure: Compact, rugged, with top-mounted jacks
• Build: Handmade in Berlin, Germany

The KMA Machines STEREO ABY – the perfect combination of reliability, transparency, and stereo flexibility. Take control of your signal with confidence.