Hello all
I need a little help if anyone can advise.
I moved into a new house and my active speakers are buzzing with a low ground loop hum
The house is 1970’s and has a dual rCD protection.
No supplier earth so its using an earth rod.
I have tested live and neutral volts, volts between earth and live and drop is no more than 1 volt difference.
It’s driving me mad.
If i take my system to another house it doesn’t buzz only in this s house, the system has speakers all connected to a preamp, all devices are two core only there is no earth on anything.
When a speaker which is made from aluminium on a metal wall mount its worse. When I take it off its less but changes which speaker is buzzing.
The speakers are all connected with a 8 pin cable that carry’s sound and trigger and every cable as a ground built in.
Does anyone have any thoughts how to identify if a specific appliance is causing this or if its the circuit itself. The speakers are connected with the TV and built in pre amp to one socket and rear speakers are on another socket.
I have tested every socket with a socket tester and there is no open connections and voltage is the same across all of them.
I know it could be that there are two sources of ground that can cause the loop but i cannot work out where it is if its that.
There appears to be one earth from the dust board to a terminal block which goes to the earth rod, the earth rod is connected to the main metal water pipe from rod to pipe, the boiler has a earth cable to the incoming connection and all rad feed and return, hot and cold have earth connected between them
Any thoughts? I am at a loss what to test to get rid of this annoying buzz that must be on the neautral unless its coming via the sky cable that is connected to the TV or the mains.
I have an electrician coming on Wednesday to change a single socket to a double and add another double on the other side of the master bedroom and they will check the earth but wonder if I am missing something.
Cheers
Sean
I need a little help if anyone can advise.
I moved into a new house and my active speakers are buzzing with a low ground loop hum
The house is 1970’s and has a dual rCD protection.
No supplier earth so its using an earth rod.
I have tested live and neutral volts, volts between earth and live and drop is no more than 1 volt difference.
It’s driving me mad.
If i take my system to another house it doesn’t buzz only in this s house, the system has speakers all connected to a preamp, all devices are two core only there is no earth on anything.
When a speaker which is made from aluminium on a metal wall mount its worse. When I take it off its less but changes which speaker is buzzing.
The speakers are all connected with a 8 pin cable that carry’s sound and trigger and every cable as a ground built in.
Does anyone have any thoughts how to identify if a specific appliance is causing this or if its the circuit itself. The speakers are connected with the TV and built in pre amp to one socket and rear speakers are on another socket.
I have tested every socket with a socket tester and there is no open connections and voltage is the same across all of them.
I know it could be that there are two sources of ground that can cause the loop but i cannot work out where it is if its that.
There appears to be one earth from the dust board to a terminal block which goes to the earth rod, the earth rod is connected to the main metal water pipe from rod to pipe, the boiler has a earth cable to the incoming connection and all rad feed and return, hot and cold have earth connected between them
Any thoughts? I am at a loss what to test to get rid of this annoying buzz that must be on the neautral unless its coming via the sky cable that is connected to the TV or the mains.
I have an electrician coming on Wednesday to change a single socket to a double and add another double on the other side of the master bedroom and they will check the earth but wonder if I am missing something.
Cheers
Sean