Pioneer sx440 parts

[Chuck awker]

I have an sx440 and I pushed it a little too much thru my Polk 5jrs and now the right side on both A and B speakers are making noise.
In the pic I'm sending the part that one side was completely off is shown.I see there are 4 of these.Could this be problem?
I took other connection off so I can take pic.

 

[Chuck awker]

I have an sx440 and I pushed it a little too much thru my Polk 5jrs and now the right side on both A and B speakers are making noise.
In the pic I'm sending the part that one side was completely off is shown.I see there are 4 of these.Could this be problem?
I took other connection off so I can take pic.View attachment 2870233

And what is this and where do I find it

 

[Chuck awker]

And what is this and where do I find it

....and it makes the scratchy sound,but music still good coming thru.I checked all inputs and the same

 

[larryderouin]

2Watt 0.5Ω resistor 10% tolerance(K) . Emitter resistor probably. It's near or connected to the output transistors? If so UNPLUG it, don't run it, and replace before powering it up again. Mouser or Digikey should have them. Sometimes they may not have a 10% tolerance. A 5% or even 1% is fine.