balanced cables


What exactly do balanced cables do, and is there any difference in sound quality? What is it that gets "balanced"? I'm in the process of buying a new(used) Mac amp and preamp, and the literature says they accept balanced cables. Is this to connect the two pieces? I'd really appreciate having some light shed on this question. Thanks.
brusuz
balance usually sounds better on longer runs-if your amp and pre are fully balanced, some don't really do it right. In rca ended cables, the negative is tied to groud, in balance you have a hot, negative and group. Some of the best equipment made is rca only, and some of the best is balanced. Sorry, but the answer is it depends.

On my BAT equipment, balanced definately sounds better.

Hope this helps some
The end of a balanced signal chain compares the positive signal phase to its mirror, and negative phase, and rejects anything else it may have acquired along the way as noise. This technique requires precise circuit matching and costs $$$. To take full advantage of this capability, the whole signal chain should be balanced starting with the source. However, connecting any balanced components together is helpful. You'll need balanced cables terminated with XLR connectors to hook it all up. Highly recommended! Enjoy your Macs.
Also because the negative phase is subtracted from the positive phase, not only is all unwanted signals picked up on the interconnect rejected, but the end result will have a 6db increase in gain over unbalanced.

In my case, with Krell, it makes a big difference. Krell is designed for balanced and I live near the highest TV/Radio tower west of the Mississippi. Television is a bitch, but my stereo is dead silient.

Richard