Kma Audio Machines Active Stereo ABY
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The essentials to know about the "Active Stereo ABY" Router
The essentials to know about the "Active Stereo ABY" Router
- Active stereo AB/Y router: 1 stereo source to 2 stereo destinations, or 2 stereo sources to 1.
- 180° phase inverter for stereo coherence and a stable image.
- Silent active soft-touch footswitch for live switching.
- "A&B>Y" or "Y>A&B" selector for intuitive signal flow.
Manufacturer Information
Kma Audio Machines
https://www.kma-machines.com
sales@kma-machines.com
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Key Information About the « Active Stereo ABY » Router
- Active stereo AB/Y router: 1 stereo source to 2 stereo destinations, or 2 stereo sources to 1.
- 180° phase inverter for stereo coherence and a stable image.
- Silent active soft footswitch for live switching.
- « A&B>Y » or « Y>A&B » selector for intuitive signal flow.
The Stereo Hub for Modern Rigs
Designed for stereo multi-effects, delays, and reverbs with dual outputs, the « Active Stereo ABY » integrates seamlessly into advanced pedalboards. Made in Berlin, it ensures clean and reliable switching for demanding stages, tours, and studios.For Creators of Space and Depth
Ideal for ambient, shoegaze, modern pop, post-rock, and any stereo bi-amp setup. It enables precise stereo splits, parallel returns, or controlled summing of two stereo chains into a single interface or stereo amplifier.Stereo Routing Without Compromise
The active circuit preserves width and definition. The discreet soft footswitch facilitates smooth transitions. The 180° phase inverter helps correct interactions between left/right paths and amplifiers. The « A&B>Y » or « Y>A&B » selector makes signal direction clear, whether splitting or merging.Sound Quality
Exemplary neutrality and high headroom to preserve transients, depth, and stereo localization. No veil: the soundstage remains wide, with solid bass and detailed highs, even on long chains.Technical specifications
| Effects | Signal Splitter, Switch | Type | sector |
| Technology | Analog | Use | electric guitar |
| Format | Pedal | Color | Black |
| Stereo mode | 1 to 2 or 2 to 1 (omnidirectional) | Documentation | included |
| Phase reversal | 180deg | Original box | included |
| Footswitch | soft, active, silent | Power supply included | no |
| Logic selector | " A&B>Y " or " Y>A&B " | Power supply | 9V DC (center-negative) |
| Stereo inputs/outputs | dual 1/4-inch jack (L/R) | Indicative power consumption | 60 mA |
| Topology | active | ||
Questions frequently asked
Is the KMA Audio Machines Active Stereo ABY compatible with stereo pedals?
Designed for stereo multi-effects as well as delays and reverbs with dual outputs, it integrates into advanced pedalboards.
How to use a stereo ABY with two amplifiers?
The A&B>Y or Y>A&B switch allows selecting the routing direction to split a signal into two paths or combine two stereo chains. The 180° phase inverter helps correct phase interactions between amplifiers and left/right channels.
Is it possible to sum two stereo chains into a single output?
It is possible to combine two stereo chains into a single interface or stereo amplifier using the Y>A&B routing mode. This function also allows considering parallel returns. The active circuit is designed to maintain signal width and definition.
Is the Active Stereo ABY suitable for ambient and shoegaze?
Designed for stereo bi-amplified setups, this model is suitable for ambient, shoegaze, modern pop, and post-rock applications.
What power supply and consumption does this stereo ABY pedal require?
The power supply is mains type and the indicative consumption is 60 mA. The pedal format includes a soft footswitch intended for discreet transitions.



