Binding posts Brass vs Copper : does really makes differences ? - Page 4 - diyAudio
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Old 29th January 2013, 10:41 PM   #31
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ok, at this point no suggestion about pure copper binding posts at resinable price ?
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Old 29th January 2013, 10:49 PM   #32
SY is offline SY  United States
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I wouldn't use pure copper- too susceptible to corrosion. Brass (1st choice) or bronze (2nd choice) would be much better.
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Old 29th January 2013, 10:51 PM   #33
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ok but brass is not a good conductor
i'm confused
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Old 29th January 2013, 10:52 PM   #34
Einric is online now Einric  United States
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I like Copper because Copper Oxide conducts nearly as well as Copper.
Granted anybody that wont notice nasty green goobers on the speaker terminals needs to just go buy a Bose In The Box and call it good.
Keep your stuff clean folks.

I really like THESE from Parts Express for speakers.
And THESE for amps.

I have used both and I think they are a good value for the money.
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Old 29th January 2013, 11:00 PM   #35
SY is offline SY  United States
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Quote:
Originally Posted by diypass View Post
ok but brass is not a good conductor
i'm confused
It's a good conductor, about 30% of the conductivity of copper. Remember that you're only running signal through less than a centimeter of it, compared to several meters of speaker cable. Absolutely negligible- the big loser in these situations is the contact resistance, and there, brass will do a much better job than copper.

Note that brass is commonly used for electrical contacts for just this reason.
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Old 29th January 2013, 11:02 PM   #36
SY is offline SY  United States
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Quote:
Originally Posted by Einric View Post
I like Copper because Copper Oxide conducts nearly as well as Copper.
No. It's a very good insulator. Conductivity is something like 10-10S/cm. The sulfide is similarly a terrible conductor.
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Old 29th January 2013, 11:03 PM   #37
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usefull explanation, thank you SY !
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Old 29th January 2013, 11:07 PM   #38
ScottG is offline ScottG  United States
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For the money you likely won't do better than these:

Cardas CPBP

If you are concerned about corrosion then opt for the more expensive Cu/Ag/Rh version.
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Last edited by ScottG; 29th January 2013 at 11:11 PM.
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Old 29th January 2013, 11:12 PM   #39
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Brass is an excellent conductor, so no problem anticipated there.
I think that some have lost the thread, as the cable. (4.00mm houshold Twin and Earth is good), followed by the type of speaker followed by the type of post connection, should be looked at.
I have a pair of Flying Mole mono-block amplifiers, in for repair. They have a lovely 4mm post connector that will convey a good 30Amps of sound current but has a measly pair of cheap and nasty tinned connectors with 0.7mm cable connecting it all together. So what you see is not always what you get!
Welcome to my Web site

And by the way,they will be repaired before they go back to the customer!

Last edited by JonSnell Electronic; 29th January 2013 at 11:14 PM. Reason: Addendum
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Old 29th January 2013, 11:39 PM   #40
Pallas is offline Pallas  Pakistan
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Quote:
Originally Posted by SY View Post
What a fancy binding post can get you is a solid, airtight connection and the ability to torque down hard enough to make such a connection. I haven't used the WBTs, but I do use Tiffany, and despite being a strong proponent of the idea that most "audiophile" stuff is marketing garbage, in this case the few extra bucks really did make a difference. Reliable and tight, I'll never go back to bananas or cheap binding posts.

FWIW, I think I paid $25 for four Tiffany posts. Second photo on this page:

Biamping the NHT M3.3
Tiff, I think, not Tiffany. They were a division of Esoteric Audio USA in Winder, GA.

EAU was best known for their car-fi subsidiary "Streetwires," but they had some eye-wateringly expensive home stuff too, under the Tiff and Esoteric Audio brands. (They also marketed some stuff to car-fi under the Tiff brand.)

IIRC, Jack Hidley had a stock of the Tiff binding posts in his NHT sale. They looked really nice.

Esoteric Audio USA made high-quality stuff. They ran into some financial trouble (I think) and their brands were bought out by Mitek, who owns MTX and some other car-fi brands.

Once I discovered the Speakon, all binding posts seemed laughably crude. Positive locking, quick disconnect, low resistance, up to four poles in one connector. And, generally speaking, cheaper. With all those advantages, why would a DIYer bother futzing with manifestly inferior solutions?
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Last edited by Pallas; 29th January 2013 at 11:41 PM.
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