Le Sun, 5 Mar 2017 22:22:26 -0500, john gibby <johnalan.gibby(a)gmail.com> a écrit : You must have 1 connection to the ground, and all the equipments must be connected to it. Normally, you connect the ground near the audio inputs, and from it, the other equipments. To connect the other equipments, you must pay attention to the ground loops. It the computer's main plug have a ground connection, it will already be connected to the ground, and you will get a ground loop via the audio cables between the computer and the amplifiers. If you cut the amplifiers ground and wire that ground directly from the amplifiers to the computer, the ground loop via the audio cables will remain, which necessitate to cut it in one side of the audio cable. So, it is no solution that will work in any case and you have to experiment what is best for your setup. Also, the main's ground itself can be noisy, especially on big setup, and it can append the only solution is to not use the main's ground and wire a separated ground on, as example, some metallic water or heater pipe. Such a setup is forbidden by law, but sometime can be the only working solution (from the sound point of view - from the security point of view, it is totally illegal, and in case of accident, it can be fatal and you will be jailed -:). Best, Dominique

On Sun, 5 Mar 2017 22:22:26 -0500, john gibby wrote: Yesno! No recommendation by a remote diagnostics! If ground is required depends on the type of electrical device. A lot of hifi equipment, if not all hifi equipment, does use Europlugs by default. Such gear could be used without risk. There's a difference between an earthed metal case and groundlift by capacitor for the circuit. A well maintained non-moving device of the type that requires earthing, not necessarily is critical, if you remove ground. Both is wrong, just recommending to remove ground completely or to connect by capacitor, as well as the claim that even for non-public private usage removing ground always is critical for non-moving, well maintained gear. The reason to claim that nobody ever should lift ground from grounded devices is reasonable overcaution. Do event engineers check all used Schuko cables, each time they use the cables? However, I also claim you should not remove ground! Perhaps you should try to kill two birds with one stone. Get better latency and audio quality and perhaps rid of the ground loop by buying a pro-sumer audio interface, instead of running a risk or to pay for workarounds or to pay for replacing the mobo, the amp or what ever else. Some troubleshooting you could do: - Are all devices involved in the ground loop are connected to the same main socket? If not, connect them to the same main socket by a multiple socket. - Are all used multiple sockets ok? Replace broken multiple sockets! - Are all used power cables, as well as audio cables, remote control cables etc. ok? Replace broken cables! - Just in case: Reconnect all cables! - Rubric Voodoo: Change the positions of the main plugs. Regards, Ralf