Amp with speaker INPUTS?? Please explain!


So, I was browsing an amplifier manual, as one does, and the diagram shows four spring clips (R+ R- L+ L-) labeled Speaker IN. (I couldn’t figure out the image hosting thing, otherwise I’d post pics. It’s an AudioSource Amp 300, and the manual is short and easy to find.) I’m not familiar with component connections beyond a couple pairs of speakers and maybe an EQ. But this puzzles me. Can someone please explain when you’d use this? The short “explanation” In the manual is woefully inadequate. 
 

I’m especially interested to know if speakers are at the other end of the wires that connect here. I mean, that would make no sense since speakers don’t send anything that direction, right? 

bricago

To those who think I’m being rude:

I’m working from the assumption that users on this board are savvy enough to know how to do a Google search. Myself included. So when that doesn’t give you the info you’re looking for, this forum is the best next step. The value of this forum, as I see it, is people with first-hand knowledge sharing it. Ask yourself if you’d be satisfied if someone’s answer to your question was a cut and paste Google AI overview. I doubt it would be. 

I can tell you one thing, I'll never offer you any assistance.  And, you were being rude.

That’s fair. But I won’t reciprocate. I’ll be happy to send you Google’s answers to your questions. 

If you're so good with Google, why did you ask the question that you did?  You professed to know nothing about the speaker input function.  I provided that answer.

Nobody on this forum owes you one minute of their time.  You act like you are owed a detailed explanation.  

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