Interchange mylar, propylene capacitors and how to determine voltage?

[fastline]

As part of my other thread in repairing an audio receiver, I have a shorted capacitor that is installed across the +/- outputs of each channel. It is marked as 472J 7F8. I can gather that this is a .0047uf cap also er the diagram BUT voltage is a big guess right now...

I am a little confused by the different types of caps and which I have here. It an orange shiny square with radial leads. Best I can do so far...

 

[ronv]

Probably something like this:

https://www.mouser.com/Search/Refine.aspx?Keyword=75mkt1817347014

If it is across the speaker the voltage need not be to high.

 

[KeepItSimpleStupid]

For non bridged outputs 2x the power supply rail. e.g. if a +-50 V rail, use 100 V minimum.

if the rails are just positive, assume bridged mode and use 4x the rail as the minimum voltage.