Few audio equipments reviewers swear by their reputation if there is any that XLR connections improve quality of the sound sonically. Some stated there is none. Can someone scientifically help me to make a wise decision to choose between XLR and singled-ended cables?
Andrew, no, no one agrees with that statement. The designer is free to apply any amount of gain to any particuliar input, he could just as well cut the gain in the xlr input by some amount compared to the rca input.
It is a different situation if the grounds are electrically seperated. Such is the case with a true dual-mono implementations or monoblock amplifiers, if they don't share grounds with an external ground wire or through the AC ground
In the case of mono amps with single ended inputs they will share the same circuit ground, they are connected together at the single ended source, ie. pre-amp.
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