TNP Premium 1/4 Inch (6.35mm) TRS to Dual RCA Cable 10 Feet Balanced TRS Cable 1/4 Inch to 2 RCA Y Splitter, Red and White Male RCA to 1/4 Adapter Headphone Jack

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Now for a balanced output, you can simply connect the + and GND terminals and ignore the -. This does not result in a "half wave" as was stated. Balanced signals work by transmitting 2 versions of the signal (completely out of phase with each other). On a devices input, the out of phase signal is inverted and the signals are now in phase and sum together. This provides common mode rejection (CMR) which is all designed at removing interference and improving SNR primarily to allow greater cable runs and premium quality for sensitive environments. Search common mode rejection for further details. One Rane Note was mentioned earlier, but they have a ton more and some specifically on balanced signals and CMR.

A TRS input is a balanced input. In balanced interconnection, the signal is defined by the voltage between the "cold" and "hot" conductors. There is a third ground/shield conductor, but it is only used to protect the system against interference and is NOT used to carry the signal.

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Now I suspect you will have short runs. The only advantage of unbalancing at input rather than source is signal to noise and not sound quality per se. As you can see opinions vary greatly on this matter. But I would say if you get good quality cable, you are safe if you are in the roughly 25 foot or perhaps 30ft range.

If 25ft to 30ft is workable for you, then I think RCA. If you need more than that, then perhaps the Sescom adapters is the better choice. Now the thing is that pins 2 & 3 in a balanced arrangement, never have a potential with respect to ground, just each other. Most RCA audio cables that are built reasonably well with shielding can be run effectively from 100 to 200 feet." Strict practice requires the line be left balanced at the output (source) and unbalanced at the input. This is called floating a line.It is clear from the original post that there is some Distance between the Focusrite Sapphire and the Stereo system, however, that distance is not specified. Until we know that, it is near impossible to say what the right choice is. Pin 1 (sleeve/screen) is always ground. Pin 2 (tip) is always the positive deflection. Pin 3 (ring) is the negative deflection, So if you ever reverse pins 2 and 3 you create an out of phase condition. RCA cable can go a considerable distance. But until we know how far we need to go, we really can not say what the best choice is. The maximum length for an RCA cable is limited by the cable capacitance, the source impedance, and the amount of induced noise. 12 feet is a common upper boundary for pre-made cables but I've built my own cables in the 20-some foot length." IF you are going to do a XLR to RCA conversion, then a Transformer based device, as we assume the Sescom is, would be the best choice.