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eBay audio connectors and you

post #1 of 12
Thread Starter 
Just thought I'd give out a public service announcement.

Valab sells some pretty nice looking stuff for cheap on ebay (vintage audio lab). Almost, too nice. Here's the info.

Gold Plated 3.5mm 1/8 Stereo Audio Connector 2 pcs - eBay (item 300366943258 end time Dec-13-09 19:29:14 PST)

I got a few of these to try out.
They're pretty handsome, similar contact assembly to the Hicon, Yarbo, Cryoparts, YA Audio, and others out there - it's a design shared among Chinese OEMs. I liked the rhodium barrel, which appears to be real rhodium (compared to some jewelry that my girlfriend has) plate and it has some set screws to secure the cable to the connector which is neat. However, the red flag here is that they claim to have real OFC copper contact material. I've worked with manufacturers before on this sort of thing, and they say that for connectors that are internally complex (as you have 3 contacts going to the tip, ring, sleeve in a small space) that pure copper is practically impossible to work with and machine. I cut up the contact assembly and sure enough, no pure OFC copper inside, just your standard brass. So...if something on ebay looks too cheap to be legitimate, it may well just be that the specs are exaggerated.

Looking at their other nice-looking, but materials-exaggerated products, they have a platinum plated RCA plug for $6 each and an IEC connector with "pure silver wire clamps" for $4. I guess that's technically kosher, as the contacts can indeed clamp pure silver wire if so you choose.

They already have a nice product for a nice price, its quality is fine. So why lie so blatantly when at least some customers will figure out that it's not real copper? It just makes me doubt their other products, which are quite cool, and I might have ordered them in the future.
post #2 of 12
Have you asked the seller about the not pure copper?
post #3 of 12
I have seen some RCA plugs that keep calling to me, but the same issue of materials comes up. They are knock offs of some Cardas RCA's, and sold by at least half a dozen sellers, but some are advertised as pure silver, and some are advertised as silver plated ofc. They are about $15 for 4 of them, making it almost impossible from that either are true. I don't know what the relative costs are of these materials, so I have no way of really knowing what I am buying. For someone using Neutrik's most basic so far, anything would probably be an upgrade or at least a sideways step, but it is hard to know if I have stumbled upon a good deal or not.

Thanks Scootermafia for trying them out and even cutting one open. Now at least people know that they are a nice alternative to the standard plugs at a reasonable price.
post #4 of 12
at 10$ why not just use viablue plugs ?
post #5 of 12
Quote:
Originally Posted by momomo6789 View Post
at 10$ why not just use viablue plugs ?
The price is for two.
post #6 of 12
ahh i didn't notice that
post #7 of 12
Quote:
Originally Posted by scootermafia View Post
They already have a nice product for a nice price, its quality is fine. So why lie so blatantly when at least some customers will figure out that it's not real copper?
Because the market has been turned into little more than a numbers game.

Of course that's no excuse for lying. But when few will take your product seriously unless you can deliver the numbers, there's certainly a huge incentive to lie.

se
post #8 of 12
Is it worth it to buy better connectors than Neutrik?

The 3.5mm ones are so cheap and seem so nice >_>

seems like if you want high quality connectors you shouldn't be using TRS anyway.

EDIT: actually, I take that back. A high quality portable setup would need this.
post #9 of 12
I have two things to say.

1: I don't understand the desire for rhodium on a connector. It does not apply evenly as a plating, and under a microscope you can see that the surface is in fact quite mountainous and deeply pitted. Far from the ideal surface characteristics for unsoldered metal-to-metal contact.

2: Rhodium is less than half as electrically conductive as gold.

But it sure is pretty, right?

The other thing i have to say - stay the heck away from cheap gold plated ebay banana plugs. they look good but the screws strip out.
post #10 of 12
Quote:
So why lie so blatantly when at least some customers will figure out that it's not real copper?
The description of the item being offered in the auction reads:

Quote:
Valab Custom Ordered Gold Plated 3.5mm Connector:

As you see in following picture, this type of 3.5mm connector is actually made by non-compromised design and very high cost materials.
I do not see any specific claims about the materials used in the construction of the 3.5mm connectors being offered.


The "second" part of the description appears to have been included by mistake because they are clearly referring to a different type of connector.

Quote:
Features of this Rhodium plated OFC RCA connector:
Gold plated pure copper conductor.

Teflon insulator for lowest capacitance, hi-z insulation and high tempreture soldering work tolerance.
Rhodium plated copper outter barel for permanent shiny looking and best insulation.
Definitely sloppy but I dunno that it qualifies as a deliberate attempt to mislead anybody.
post #11 of 12
Quote:
Originally Posted by ericj View Post
...I don't understand the desire for rhodium on a connector. It does not apply evenly as a plating, and under a microscope you can see that the surface is in fact quite mountainous and deeply pitted. Far from the ideal surface characteristics for unsoldered metal-to-metal contact...Rhodium is less than half as electrically conductive as gold.
...
x2. I don't know a thing about this, but I have a good friend who is a metallurgist and he agrees -- don't use rhodium connectors. And he says also "don't mix the metals".
post #12 of 12
But does the lack of conductivity and imperfect surface actually make an audible difference? Certainly it looks very pretty and doesn't corrode so it definitely has its benefits. Almost every high end manufacturer of connectors uses it in some applications.
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