Need 25 foot interconnects

My advice:  Try the unbalanced with cheap RCA cables first.  if the noise is acceptable then you can upgrade.  If on the other hand it's a noisy mess, you are going to have to find something better.

If long interconnects needed for sure XLR ,that’s what all recording studios 

use for lowest possible noise .

first, balance to an adapter means..... unbalanced. Total waste of time, effort and money draw it out for yourself and see.

Second. Your plan is fundamentally good. Bigger differences in speaker cable due to the currents involved. Want an explanation - search for the club preso fromt he Belden engineer who does Blue jeans cables. He does a great job so why would i waste 10,000 words duplicating it? :-)

Pick a good interconnect with modest capacitance and decent shielding. For home environments most are fine. Quality of cables (dieletric, etc) of course always matters, and 30’ means it matters more.

G

ps: some posts above advocating XLR. 1) XLR is a plug not a transport topology although it ought to mean balanced. If you use XLR to an adapter its nothing more than excess metal. 2) they maybe didn’t read your post indicating you cannot accept a true balanced input. 3) if they did read it they have no idea what they are typing about.

Quick tutorial: Balance has little to do with the plugs, but the de facto standard is XLR.  Balanced means tow mirror image signals that deferentially sum (one +, one -) to the input. This means that they are relatively immune to interference since if a magnetic wave passes through it adds to both sides, and they are subtracted, so it cancels. Its that simple.  Balanced means immunity in a very noisy environment.  So, is your living room noisy (magnetically) in the audio band? if so, move the refrigerator out!  Its really not a big deal unless you are experiencing some kind of hum or noise.

Now let's get more detailed.  90%+ of all banced inputs and putputs are total bullshit.  Yes, they cancel noise. But they are typically implemented with an additional stage of electronics on top of the normal signal path, This flies int he face of purist design.  Worse, some (most?) of those use an op amp.  QED. So you are often much better off using the regular RCA out unless the circuit is inherently differential/balanced (as in the case of most of my preamp and power amp front-end designs). And even given that,  -- where i have a selfish reason to push it -- i don't necessarily advocate using it unless you have a demonstrated need.

really good unbalanced interconnect.  WBT or similar on good, shielded twister pair cables.  Move on.

@erik_squires 

This is exactly what I would do in his situation, balanced might be better if you have tons of noise from other equipment like recording studios do, but in the home environment it's unlikely, though it does happen every once and a while.

+1 for Erik's suggestion.  Probably not a noise problem in the listening room.