Grounded Speaker Cable

I couldn't find a reference to that cable, but guessing it's shielded and that's what the ground is for?

Here's an interesting article on the grounding debate that may explain it:  Grounding and shielding: No size fits all

Personally, I've been eyeing Analysis Plus' speaker cables because of their approach to shielding.

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

Mike

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

@ditusa These speaker cables apparently have a ground wire running from the cable itself to a nearby outlet. If the purpose of this is to reduce RF (as with Tannoy), then it may be more useful in a city, where a lot of RF exists typically, instead of in a more rural area.

@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