How to fix these?

I had another pair exactly like that Sonys they also outperformed the insignia for bass . But they sounded good when I ran them with each other..insignia are hooked up correctly just have no low bass . Or mid bass under 80hz
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I turned the bass up +10 on the receiver . It’s just by basement system no sub output on this stereo amp
 
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Nope still not much bass at all. They do sound pretty good though. I’m not saying they are junk.
I turned treble down all the way they definitely produce bass . Just I can’t hear it sitting 10 feet away . It’s in the basement. Up close I hear it.
They get good reviews but I don’t have a sub I can attach to this amp. Insignia ns str514
https://www.avsforum.com/threads/insignia-ns-sp213-bookshelves-are-they-any-good.3266027/
it can run two pairs of speakers.