Grounded Speaker Cable

Tannoy speakers use a earth ground wire see here @ 6:39.

Mike

@rlb61 Wrote:

Makes me wonder whether the separate ground wire could cause a ground loop hum due to too many grounded items.

The separate ground wire is not connected to the crossover.

I think it earth grounds the metal driver speaker basket only. In my opinion, it's for marketing purposes. 😎

Mike

@rib61, This article just came to mind an overview of audio system grounding and interfacing see here.

Mike