XLR interconnects

(https://www.presonus.com/news/articles/balanced-unbalanced) Some fully balanced devices(like my BAT VK-D5) will output twice the voltage with their balanced connection, and will also vary impedances, which may sound much different than their single-ended connection, depending on things like whether the device being fed’s input is truly differential, it’s impedance, etc. Here’s an article that notes some of the variables, in it’s measurements/comments: (http://www.stereophile.com/content/balanced-audio-technology-vk-d5-cd-player-measurements#MxCpgkJ7CX...) Keep in mind, if both devices are fully differential, more voltage/headroom=louder=sounds better to the ear, and may actually measure better(freq response), in some cases.

" Effort?  What effort?

XLR is the default.  Just do it! "

The effort for buying new cables for a system that's not balanced. And if the components are single ended, op amps are used to accommodate the cables, and can actually degrade sound quality. The money is better spent elsewhere.

" Reason I ask is that I will be getting a preamp that has XLR outputs and would consider using them if it truly makes a difference in sound over unbalanced. If not, then I'll stick with unbalanced cables and just enjoy the music."

Again, having components with xlr inputs and outputs, does not mean its balanced. Its not a small percentage either. Over 50% of xlr components fall into the single ended category. List some of the preamps you're looking at and I'll show you how to tell the difference. 

Hi sfall..the only preamp I'm looking at right now is the Rotel RSP 1582. I'm waiting for the new boards to be installed at the factory so its just a simple plug and play when I do pull the trigger. Is Rotel gear truly balanced from their preamps to power amps? The RSP 1582 has balanced XLR inputs on it as well. 

2007audioman

The Rotel RSP 1582 has XLR inputs and outputs but it's not really balanced unless you have very "noisy" environment I really don't think the XLR cable will make any difference.