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Mu metal for Brio Integratdd

Hello All

Last year I bought latest version Rega Brio integrated. I paid 300$ and I’m very pleased on how it powers my Tekton speakers. One issue though. Hummmmmm. I confirmed through audio tech and searching forums the small 1/2 size chassis contributes to this issue. I tried several recommendations for confirming it’s not ground loop issue or issue with house wiring or from other components…..I was tempted to purchase some MU metal and enclose the top and sides of the toroidal transformer. Has any one attempted this on the Rega integrated or other amps? Did it address the problem? Any advice on doing this mod?

pdspecl
pdspecl OP
254 posts
 

I tried most of what was suggested.   I also removed all components except the Brio integrated amp.    Still have the hum.    I’ve had many other combinations of components in the same room and never had a problem.  Tube amps, solid state amps…. All kinds of gear and different configurations. No issues until I got this Rega.   Also I checked and it appears other owners noted the same issue with their units.   

mlsstl
1,395 posts
 

You bought a $1K amp for $300, so sounds like you picked up a used unit. Have you considered the possibility that it needs service? Could be a bad capacitor, a bad internal connection, or some other problem that needs professional technical service.

pdspecl OP
254 posts
 

Good point.   I did bring it to a certified tech who gave it a clean bill of health so to speak.   I may try the mu metal as per Amazon for a sheet at about $60.  Worth a try so to speak

mlsstl
1,395 posts
 

How did the certified tech explain the hum?

pdspecl OP
254 posts
 

Actually I had two techs look at it and both stated the close confines of the components in the 1/2 sized chassis is the likely culprit

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