Buzzing bluetooth transmitter...

leamspaceman

Distinguished Member
Didn't really know where to post this so thought I'd ask here in GC.

I bought a bluetooth transmitter to broadcast audio from my amp to my bluetooth headphones.

It's this one:

https://www.amazon.co.uk/dp/B07N1F7GXM/ref=cm_sw_r_cp_apa_i_SFyADbGQ1655J

So... I have it connected to the headphone out of my amp.

I'm powering it from the USB of a mini-pc.

When I listen to anything via the transmitter with the power supply plugged in I get an awful buzz. As soon as I unplug the USB cable the audio is crystal clear. Doesn't seem to matter where I power it from (PS4 USB/Amp USB/TV USB) the buzz remains.

So it's probably a ground loop issue.

I want the transmitter to be in a location that will make having to keep disconnecting the power annoying.

Any ideas how I can get rid of the buzz?

I've seen USB isolaters:

https://www.amazon.co.uk/GeeekPi-Is...7M72YQSC6KF&psc=1&refRID=8KYYVRD80YSD64SBH6HR

Would that solve it?

Or one of these:

https://www.amazon.co.uk/gp/aw/d/B0...crb_top?ie=UTF8#cm_cr_carousel_images_section
 

noiseboy72

Distinguished Member
I had the same issue and yes, it's a ground loop. Best bet is an audio isolator, as you cannot break the earth loop on the power supply side. The 2nd unit you linked to should be fine.
 

leamspaceman

Distinguished Member
I had the same issue and yes, it's a ground loop. Best bet is an audio isolator, as you cannot break the earth loop on the power supply side. The 2nd unit you linked to should be fine.

Thank you.

I ordered one and it'll be here today so I'll report back.

Appreciate you taking the time out to respond... :clap:
 

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