Korg Forums

Palio · Joined: 09 Oct 2010 Posts: 5

Hi. I want to ask how seems Korg Microstation adapter (European, germany or Poland especially). It has 3-pin wall plug, or 2-pin WITHOUT grounding hole? My M50 adapter have 3-pin (2 pins and grounding hole) and when I power on synth I listen ground loop from speakers.
Thanx for reply and sorry for my english.

bradkorg · Senior Member Joined: 14 Oct 2011 Posts: 280

It has original Korg KA-350 PSU, DC 9V, 1.7A=1700mA, just 2pin and non grounding.

this:
http://en.euroguitar.com/accessory/korg/ka350/144671.html
site is wrong with 9V/3000mA

bradkorg · Senior Member Joined: 14 Oct 2011 Posts: 280

It is a switching powersupply, which can cause noise when polarity is wrong plugged in, just plug the reverse side L(ive) and N(eutral) to test which gives lesser noise.

And the grounding caused the hum loop?
Use the same/only 1 ground/powerline as your speakers.

Palio · Joined: 09 Oct 2010 Posts: 5

Thanks a lot. you helped me
I am now using the same powerline for my monitors and synths, but hum is still here.

bradkorg · Senior Member Joined: 14 Oct 2011 Posts: 280

Then you got to find out step by step, what/which device cause the hum loop.
Powersupply line/ground, audio inputs/outputs.
Try the connect just 1 device to the speaker first and just one L/R audio output or test the headphone output, switch the powersupply sides etc.

Just google audio instrument groundloop hum etc. for further real solutions etc.

Palio · Joined: 09 Oct 2010 Posts: 5

Hours and hours I spend looking for a solution. Result? I probably have a ghost in my home Very Happy

bradkorg · Senior Member Joined: 14 Oct 2011 Posts: 280