Is it all brass? Try a magnet and check if it has any steel in it.
What brand and type of wall receptacle are you using?
Is the wall outlet box made of steel or plastic?
Last but not least, explain what you are hearing. What differences are you hearing from the sound of your system with the brass plate over the wall plate you were using? Is the old wall plate plastic?
What brand and type of wall receptacle are you using?
Is the wall outlet box made of steel or plastic?
Last but not least, explain what you are hearing. What differences are you hearing from the sound of your system with the brass plate over the wall plate you were using? Is the old wall plate plastic?