Quote Originally Posted by Smokey
Even if we assume that voltage output will be alright, you still can not get around the disadvantages of shorting two inputs together via Y cable.
Connecting two inputs to a single output using a Y cable does not create a short circuit. You're perhaps confusing that with connecting two outputs to a single input.

If for some reason you don't want to use a Y cable when sending a single to multiple places, your alternative is to use a distribution amplifier. But be aware that a distribution amplifier actually has a Y cable on its circuit board. The legs of the Y connect to individual amplifier stages which isolate and drive the outputs.