Robb, there's no "sound quality" factor involved, other than the possible effect of electrical interference. Sometimes the added voltage with the balanced input(if the amp gain isn't lower on the balanced input to equalize)causes a louder volume at the same setting and is mistaken for things such as "better bass", "clearer highs", "wider soundfield", etc. which are simply due to the increased volume(a common factor with amplifier sound misunderstandings). If, as is usually the case, the shielding on a cable such as the MonoPrice item shown is adequate, then a balanced connection has no benefit. In any case, the point is moot since the amplifier here has no balanced input circuitry.
