EB70 and Acoustic Amplifier Buzz

Product Discussion BLUETTI EB Series
1

I am trying to use the EB70 to power my 25amp Fender Acoustic Amplifier. It powers up fine, but I get a fairly loud buzzing sound. When I touch the metal end of the cord running from the amp to my acoustic guitar, it goes away. When I touch metal parts of the amplifier it reduces the buzzing. I’ve tried three different cords.

I DO NOT get this when plugged into a house plug. I also had this problem when I tried a powerwerks amplifier.

It is clearly some kind of grounding topic. When I hold the metal part of the cord, the sound is fine - no buzz. I am getting “dirty” power to the guitar. I’m not sure that it is safe to use?

Any ideas of how to resolve? There are products to plug into the electric source that may tone down the buzz. I’m hoping to not have to buy anything.

Ideas? Thoughts? I’m waiting to hear back from technical support as well.

2

Hi @jsk125
The Bluetti Units does have a floating ground, so no real connection to “earth”. Almost every powerstation with some rare exception have this kind of problem when connected to something like a speaker. Some Powerstation have it more, some less. Thats atleast what i see so far.

Cant give you any tips to may resolve the issue. Maybe @BLUETTI have some idea?

greetings
Erik

3

@jsk125 I’m sorry for the inconvenience. Basically, these kinds of musical instruments will have this kind of interference. This is an electromagnetic compatibility issue. You can only try to move farther away.