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120Hz hum when using 230V rated G1s on 110V

marikka, modified 5 Years ago.

120Hz hum when using 230V rated G1s on 110V

Youngling Posts: 1 Join Date: 2/8/18 Recent Posts

I have Genelec G1 (G1AWM-6) speakers, which to my understanding, are the 230V-only rated "A" versions. I've recently moved to the US, and tried these directly on 110V mains, using a simple plug adapter. I can play music, but if my source (iPhone) is completely muted, or even if nothing is connected to the input, I get a very noticeable 120Hz background hum noise.

What causes this hum, and would using a step-up voltage transformer (e.g. fix the problem?

Thank you for your help!

jani-oksanen, modified 5 Years ago.

RE: 120Hz hum when using 230V rated G1s on 110V

Jedi Master Posts: 449 Join Date: 3/30/17 Recent Posts


230V monitors should not be used in 120V. Step-up transformer can be used to make monitors work correctly and to remove the hum. Step-up converter for two G One (A) needs minimum of 140W of power.

Best Regards,
Jani Oksanen
Customer Support