If you are running an 1 4 cable that is trs then you are utilizing a balanced cable that is designed for longer runs which is likely why you are not getting noise from a balanced device to a speaker.
Balanced trs to rca cable.
It may also be used as a stereo interconnect.
As you see in the diagram above there are three male pins inside the connector the groundwire the hot signal and the cold signal.
This cable is designed to interconnect pro audio gear with balanced phone jacks.
A quarter inch trs cable is another balanced professional audio cable.
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1 4 to xlr cables are typically balanced cables with a ground pin and would act in the same way as a full xlr or trs cable.
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