Please explain what balanced out puts are.

I don't think the work "balanced" in your amp literature is referring to outputs as XLR versus RCA cables. If you read the literature for Blue Circle or Sim Moon solid state amps, they both say they are "pure solid state DC coupled true balanced design". I am not an amplifier expert, so I don't know what that means other than they are not referring to balanced output cable connections.

A balanced connection has two signals and one ground. The American Standard: Pin 1 is GROUND; Pin 2 is the COLD (negative) out of phase signal; Pin 3 is the HOT (positive) in phase signal. In the European Standard balanced connection, Pin 2 is HOT and Pin 3 is COLD. When mating different brands of equipment it's considered preferable to preserve signal phase, hot to hot and cold to cold.

Th outputs of some balanced circuits boast a summing of the balanced signals when they are operated with a single ended RCA connection. Others simply disconnect one phase.

Other than its noise cancelling properties, some listeners report a more 'floaty' quality to the sound of a balanced setup. DAC's and preamps often offer double the voltage output when balanced compared to single ended. Using a balanced DAC can result in a lot of 'free gain' for a preamp but can also limit the range of a preamp's volume control. Let your ears and pocketbook be your guide.

There's some incorrect information in one of the posts above and I'll also attempt to clarify situations where balanced interconnects might be useful.

First, in a truly balanced circuit with XLR connectors, there is one common/shield pin, a positive pin, and a negative pin. In this setup the electrical audio signal is allowed to swing above and below common and undesired signals like hum and other common mode noise tend to cancel. It is true that balanced interconnects can be beneficial for long cable runs because long cables are prone to picking up more noise than short cables and balanced cables and circuits tend to cancel the effects of this common mode noise. But even with short cable runs, balanced interconnects may help to minimize the effects of ground loop induced hum or noise. In practical terms this basically means, if you hear a slight buzz or hum in your system, balanced interconnects may help to minimize or eliminate this noise. Other than being inherently quieter than unbalanced (RCA) interconnects, it is debatable whether there is any sonic benefit to using balanced (XLR) vs unbalanced (RCA) interconnects.

Microphonics are basically the effects of vibration on the equipment affecting the sound produced by the equipment. No interconnect will have an effect on this as the cables in your system do not contribute to or minimize microphonics.

Thanks to all for taking the time to answer my question.