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The connecting cable should have the cold signal conductor of the cable tied to ground at the source-side only (the unbalanced end of the cable). The load-side of the cable will be connected in a typical balanced configuration. In this app note, we will demonstrate subwoofer integration for miniDSP'sstereoDirac Live processors using only the Dirac Live app for measurement 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. Now the thing is that pins 2 & 3 in a balanced arrangement, never have a potential with respect to ground, just each other.
Impedance-balanced outputs can connect to unbalanced loads with the cold output 'floated' (unconnected) or connected to ground. There will be no performance or other differences between a floated or grounded cold conductor (pin-3) with impedance-balanced outputs. Using an XLR connector, this corresponds to pin-3 floating or tied to pin-1. The hot signal conductor will be connected to pin-2, as usual, and it will carry the audio information. The shield conductor will be connected, as usual, to pin-1. 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. Note how the TRS side is only connected with Tip and Sleeve while RCA side is not using the shield. A more sophisticated connection may be needed for aggressive common-mode rejection, which may require modifying the equipment. For information about this type of setup, refer to the "Shield Wires" section (5.4) of The Clean Audio Installation Guide.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. Transformer-balanced outputs must have the cold output tied to the shield conductor when connecting to an unbalanced load. Using an XLR connector, this corresponds to tying pin-3 to pin-1. The hot signal conductor will be connected to pin-2, as usual, and it will carry the audio information. The shield conductor will be connected, as usual, to pin-1.
The second "stereo" adapter is an unknown. It may be designed as an adapter to send a mono RCA signal to both stereo channels of a stereo TRS input. In that case the tip and ring would be connected together. If it's wired that way it won't work as a mono TRS to RCA adapter when connected to a balanced output. It may be wired with the Ring open. If so it will work as well as as TS adapter when connected to a impedance balanced output, but not at all if connected to a transformer balanced output. I know I'm coming in late on this one, but other people might benefit. The statement that "all pins must be connected" is not true. It will depend on the equipment and whether you are connecting to an input or output. In many cases, it is a best practice to jumper + and - on an input when connecting an unbalanced signal to a balanced input. So, in this case, yes all pins would be connected.In this application note, we will show you how to design an active 2-way loudspeaker with the miniDSP 2x4 HD/Flex. Using the 2x4 HD/Flex, you can either create a conventional (Linkwitz-Riley or Butterworth) crossover, or a linear phase crossover.
A TS input is an unbalanced input. In unbalanced interconnection, the signal is defined by the voltage between the ground/shield and the other conductor. When connecting an active-balanced output to an unbalanced load, it is necessary to leave the cold output (pin-3) floating. Using an XLR connector, pin-3 should not be connected to anything. If a cable is used with pin-3 tied to pin-1 (shield), the output amplifier could be damaged. This type of connection establishes a low/no impedance path to ground. This means the amplifier will drain current, unimpeded, into ground, which is stressful to the output amplifier. The miniDSP Flex is the 3rd generation of our popular line of compact 2-in, 4-out audio processors. It retains the powerful floating point processor but rethinks the I/O architecture so we can provide our customers with different input-output versions in this compact chassis. The initial versions are single-ended analog I/O (RCA), balanced analog I/O (TRS) and digital out with superb audiophile specification for your enjoyment. An unbalanced-to-balanced connection should use a 3-conductor (balanced) wire. The explanation behind this technique is somewhat complicated, and it is beyond the scope of this article. For an in-depth look at the technical explanation for this solution, read section 5.4, "Shield Wires", of The Clean Audio Installation Guide. ( http://www.benchmarkmedia.com/caig/ )Digital Audio Processor — Flex based on the I/O configuration selected. No Dirac Live license for default configuration
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