Balanced cable/CKT can get rid of common mode noise in the CKT(most likely from power line) and RF noise in the air. If you alrady have a stable power line/cable and clean air (free from RF noise), then you probably won't tell the difference. Usually people need it for long cable or in an electronically noisy enviroment.
Balanced cable should have better shielding from RF stuff. On the other hand, things like fiber optic won't be bothered by RF also. Use differential amplification and/or have a good power supply can reduce noise level and have better result.
For me, my preamp is single-ended so I put preamp close to my power amp and keep IC short. Of course, power conditioning will help. For those who has balanced preamp..., you can keep your components far apart with balance calbes and don't have to suffer from noise from air.
Balanced cable should have better shielding from RF stuff. On the other hand, things like fiber optic won't be bothered by RF also. Use differential amplification and/or have a good power supply can reduce noise level and have better result.
For me, my preamp is single-ended so I put preamp close to my power amp and keep IC short. Of course, power conditioning will help. For those who has balanced preamp..., you can keep your components far apart with balance calbes and don't have to suffer from noise from air.