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24.150.0.186
In Reply to: RE: Straight Wire Crescendo-II I/C cable posted by Duster on June 05, 2012 at 10:56:55
Reading that I would assume you have encountered a very honest and reasonable dealer. So I would ask, instead of seeking advice on a web thread that might end up just spending a lot more of your money, why wouldn't you just refer this problem back to the dealer and ask if he could rectify it? May just be a matter of adjustment of the collar. Or if the inputs on the cdp need replacing, he might do it inexpensively to retain a happy customer.
Really what the heck would a bad solder joint have to do with an RCA slipping off the connection?
Follow Ups:
"why wouldn't you just refer this problem back to the dealer?" - Because of a very long distance between us...
New? Warranty/ Shipping a cable? Even a heavy one? So $18 against $700?Jesus.....
that dealer is clueless and you have made a bad assumption
seems like you're saying the connection is 'superficially' solid but the sound is not which of course could be a solder joint inside. But I stand by taking it back to the dealer.
My question to the experts: are RCA connectors not made to certain standards of measurement under UL code? Are makers of 'exotic' connectors making them larger or smaller than the original UL code for RCA?
UL has to do with safety standards, and they typically address things like whether or not there is enough copper in a an AC cord to prevent actual heating of the copper metal when current flows through a power cord.
They only indirectly have anything to do with actual product quality, for by a product meeting UL safety standards, this assures a certain minimum performance with regard to the most basic and simplistic specs.
However, once we get away from safety issues that are as clear cut as not allowing the copper conductors in an AC cord to get so hot they present a fire hazard, they really don't provide much assurance in the way of product quality or performance.
UL provides none, nor calls for, any standards with regard to RCA plugs and jacks with regard to physical sizes, electrical contact or conductivity, except for those cases where they might require a ground to be made to a circuit ground or chassis ground by the RCA outer shell for safety purposes.
RCA plugs were developed as an incredibly inexpensive alternative to professional grade connectors back in the early days of home consumer hi-fi. The earliest ones were used only WITHIN the cabinet or chassis of an audio component, most often, to allow the phono cartridge to be unplugged from the preamp section for servicing. These had no barrels, no strain relief, no significant mechanical strength, because they weren't meant to be unplugged more than once or twice in their lifetime.
Once they started being used outside the chassis, they were made a little more sturdy, but were still butt ugly and of generally cheesy construction.
Once folks figured out cables made a sonic difference, the lowly RCA plug was studied and essentially re-designed by several high end manufacturer's, who beefed up the center pin, used superior materials, created a shielding barrel, and instituted the use of precious metals (gold) for the contacts, due to the all too frequent and predictable oxidation of the then common TINNED contacts. Yes, they were actually tin plated (usually over steel).
Later, chrome over the tin was used for cosmetic reasons, but they also did not tend to corrode as easily. It was still a poor signal connection.
See:
http://www.tubeampdoctor.com/en/shop_Cables_Jacks_amp_Plugs_Connectors/RCA_Plug_chrome_for_older_Fender_Footswitch_315
for an example.
Modern high end audio RCA plugs and jacks are all an attempt to circumvent the fundamentally flawed original design, and the need to remain "compatible" with other such plugs and jacks.
And yes, Duster is right, they all sound slightly different, and can affect the overall performance of the cable they are used with.
Jon Risch
The OP wrote:
"...one of terminations connected to the CDP frequently gets loose (through superficially the connection is firm) and the left channel gets "out"."
While not so succinct, a description of an rca connector interface being "superficially the connection is firm" indicates that although the connection feels firm, the integrity of the left channel signal is still intermittent. The OP goes on to say that the heavy cables noticeably sag when connected to the CDP rca jacks. In my experience, a cold solder joint often produces this type of issue, so it is a possibility. Furthermore, I simply described potential scenarios that might be considered while trying to solve the problem.
finski wrote:
"My question to the experts: are RCA connectors not made to certain standards of measurement under UL code? Are makers of 'exotic' connectors making them larger or smaller than the original UL code for RCA?"
UL has nothing to do with a line-level audio interface. It's not a dangerous safety issue, so there's no certain standard of measurement under UL code or otherwise exists for rca jacks nor rca plugs for that matter. Some jacks grab a center pin like a bloody vice, whole others are silly-loose. This issue also has nothing to do with 'exotic' connectors vs. those of a mundane electronics store variety.
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