KMA AB/Y User manual

Quick Start Guide
Made in Berlin, Germany since 2013
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E-mail: [email protected] | Website: www.kmamachines.com
© 2023 KMA Audio Machines UG & Co.KG
Quick Start Guide
Thank you for purchasing this ABY Pedal. We hope you get many years of
pleasure and use from this device and if this is your rst product from our
brand, welcome!
This simple connecting guide should help start you on your journey to
sonic creativity. However, if you wish to know more of the pedal’s hidden
secrets, you can nd more info on the product page at:
kmamachines.com/aby
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.
That might well be a very wordy mouthful, but here’s what it means
practically - the audio signal itself is entirely untouched and without any
colouration. However, the actual switching is taken care of by our reliable
and sturdy soft switching mechanism, with our separate active relay-
based circuit. By employing this switching technology, any mechanical
and phyisical noise from those annoying loud clicks and pops, that you
can get from many regular passive AB/Y pedals, is greatly reduced.
Also, because of its passive signal nature, our ABY can be used as a Dual
Input device, as well as a Dual Output box in either direction. This allows
you to switch instruments, amps or any kind of signal really quickly, easily
and without unplugging and or re-plugging them.
This can lead to some very creative yet simple scenarios with effects.
Here are a couple of examples to get you going:
1. Easily switch between a delay, then a fuzz or even combine them
together.
2. The pedal can send your rig into a totally different direction when
performing or looping etc.; play a riff with a guitar connected to A
through a fuzz pedal and then switch the AB/Y to B and perform a bassline
seamlessly, through exactly the same pedal or chain. AB/Y QSG V1.02
ABY Main Specications
• Passive AB/Y pedal with Active switching
• Sends an input to two separate outputs or two inputs to one source,
separately or combined
• 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
• Compact enclosure with top-mounted jacks - will t into any setup
• Made in Berlin
Power requirements:
9 V DC, centre -, 2.1 mm, 40 mA max. current draw

AB/Y
A Y B
A | B A & B
9 V DC
Input
A & B
Push to activate this mode combining
A and B channels together. To cancel,
push again and the previously selected
singular A or B path will be active
CHANNEL B (INPUT/OUTPUT)
Connect your amplier/pedal(s) /instrument
or other audio devices here
CHANNEL A (INPUT/OUTPUT)
Connect your amplier/pedal(s) /instrument
or other audio devices here
BLUE LED
Shows when the
combined A & B mode
is activated
A | B
Toggles between either
the Channel Aor B
signal paths
RED LED
Shows when the
Channel Apath
is activated
YELLOW LED
Shows when the
Channel Bpath
is activated
CHANNEL Y (INPUT/OUTPUT)
Connect your amplier/pedal(s) /instrument
or other audio devices here