HTiB speakers with standalone receiver

[CasuallyDressed]

A bit of advice needed please. I currently have a Samsung HTF5500 which is slowly sh*tting itself (keeps overheating and turning off), but I quite like the speakers. They look good with the rest of my setup.

I'm looking at getting a dedicated receiver, mainly because of the overheating problem but also because I'm struggling to find a decent HDMI switch that plays nicely with HDCP 2.2 (PS4 Pro HDR is the bane of my existence right now). The receiver I'm looking at (Yahama RXV381) is on sale at Richer Sounds right now and it makes a point to say that it likes HDCP 2.2.

I'm not totally silly. I know if I put too many watts through weak speakers then they'll pop. I'm wondering though if I can get away with just playing at low volumes until such a time I feel like throwing down some more cash on new speakers, or if indeed there is a manual max setting I can set on the receiver so I don't mindlessly go above this limit.

One last thing. The Yamaha has bare cable speaker inputs and a phono sub input. The Sammy speakers have their usual proprietary connectors which I can strip back for the speakers, but how do I wire up with phono connector? Is black inner and red outer?

Thanks in advance!