Three outputs into same amplifier input?

plong

Estimable
Jun 7, 2015
1
0
4,510
I have outputs from three devices--TV headphone out, receiver headphone out, and turntable out. I currently have an input-selector box between them and the amp. Since I would only have one of them turned on at a time, do I need it? I thought about replacing the selector with a couple of cascading 3.5mm Y adapters. Would this hurt anything?