Originally Posted by KaBoom
I have surched for a mixing device but hear that is a problem area of mixing two signals into one input.
I don't know about headphone amplifiers but mixing two line-level signals into one output with a Y-cable is dangerous for the two amps. Somehow they are fighting against another... or something.
There have to be a resistor (or something
) in the Y-cable to make it safe.
(On the other hand, splitting one signal to two outputs is safe.)
A purpose-built mixer would of course be safe. Combining two headphone-level signals into one without any additional resistors might not be.