Latest phono (RCA) cable craziness.

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I needed to pick up a phono to phono cable for a subwoofer, no urgency, just something I'm going to need in the next few days.

I was passing a high street hifi shop who have around 25 branches so they're relatively well known and I popped in to grab one.

He asked me what it was for and so I told him. He said that he's got exactly what I want and offered me a cable for just under £30. I metaphorically coughed and spluttered at that price and asked what's so special about it.

He told me that it's made especially for subwoofers and that the ground isn't connected at one end to prevent earth loops. He actually said that it's 'floating'. He also said it should be connected so that the writing on the cable started at the TV end so that the floating earth end would be at the subwoofer.

I questioned this. I specifically asked if he meant that the outer wasn't linked between each end and he was adamant that was the case.

Incredulously, I took it out of the box and asked if he had a multimeter, expecting the answer to be 'lol, no' but he reached into his drawer and had one there! I checked continuity from one end to the other and of course, both inner and outer were connected.

It's not like RF where there would be a DC short across a balun, this is a straight phono cable.

I know some of these audiophile monkeys will believe anything they're told but seriously, to suggest that a phono cable won't have both connections is just taking the biscuit. How can people be so gullible as to believe this garbage?

Needless to say, I made my excuses and left.
 
There may have been an outer shield over a construction containing two other conductors. One of the ends of the outer shield left floating.
It's a length of wire with one phono on each end with conductivity between the centre pins at each end and the outer at each end. Nothing could be floating, there wouldn't be connectivity.

it doesn’t need magical jojo juice and diamonds.
Ahh, according to the man in the shop, it doesn't need both cores connecting! That sounds quite magical :D

just use a thick piece of shielded copper wire..
Exactly! It doesn't need anything special.
 
OK, think standard coax connected to RCA each end, but with an additional shield over the coax connected to the RCA outer only at one end.
OK, he didn't explain it like that.

But what is that supposed to achieve (apart from acting as an aerial)? It can't be anything to do with an actual ground because both source and sub are powered by figure eight power cables so they're not even connected to the mains earth.

/edit - Ahh, I see this concept was 'invented' by Monster Cables. Well that explains everything really :rolleyes:
 
What do you mean by additional shield over the coax? like dual shield cable? conductor, insulator, braid then a layer of foil around the braid but not connected at one end? it really just sounds like a snake oil sales pitch to sell a £3 cable for £30.
That's exactly how I read it.

That's not how it was explained to me in the shop.
 
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