- Joined: June 2001
- Post Count: 7,270
1) It's not so much the cable or the connections per se, it's that you've got (presumably) balanced circuitry at both ends that provides a benefit. Rather than have one line signal, you've got two although they're of opposite polarity. Numerical benefits are seen in a couple of areas. First, there is a reduction in hiss of approximately 3dB by virtue that it's balanced. Secondly there is an enormous reduction in noise pickup of 40 dB or more.
2) It can be, yes. Inexpensive sources of XLR connections abound and ready sources can be found at places like Guitar Center (they're all over the country, like Burger King). Some time back I recall someone posting a link for what appeared to be pretty inexpensive cables. If I can locate it, I'll repost it.
An additional benefit of XLR is that the connector and connection itself is much more robust than RCA's.
So will you realize an audible benefit? That really depends if you've got audible noise to begin with or exteranlly generated fields that are inducing noise in your RCA's. Generally, XLR's have their greatest utility in very long distances. Seeing as you've got it, regardless if there's an audible benefit or not, I'd use it. It seems to me the prudent thing to do.
"Thinking is what a great many people think they are doing when they are simply rearranging their prejudices."
- William James
- Joined: June 2001
- Post Count: 7,270
If the noise is originating between the preamp and amp there's a few things you can do.
First, you should take a look to see if you've got external sources of generated hum. Things like dimmers, walwarts, halogens, fluorescents, etc. come to mind. I'd simply remove the potentially offending devices or turn them off and listen to what happens. Also a ground loop as a result of your cable are potential sources. Simply disconnect them totally from your system.
Second you could try a better shielded interconnect but if that doesn't work you might be out the money.
Thirdly, I rarely ever recommend a particular product however worth very serious consideration is a product called the EbTech Hum Eliminator. It sits as an interface between your amp and preamp and acts as a quasi-XLR interface. Basically you connect your cables into one end and then another set of cables goes into your amp. You can find it at Guitar Center (check your yellow pages or online for the location of one nearest you). They do dicker on price and if it doesn't work, you can return it and get your money back. An individual on this forum who had hum induced by a refrigerator successfully used the product and got a spectacularly quiet background.
"Thinking is what a great many people think they are doing when they are simply rearranging their prejudices."
- William James
