BR-1200CD help with getting speakers to work

I can't figure out what to buy or what I need as far as adaptors go or maybe it's a settings problem but the speaker won't work good like the sound is so low all the way turned up I have 10" speakers with tweeters they aren't powered or anything does anyone know what I need to buy or do to make them work great
 
I can't figure out what to buy or what I need as far as adaptors go or maybe it's a settings problem but the speaker won't work good like the sound is so low all the way turned up I have 10" speakers with tweeters they aren't powered or anything does anyone know what I need to buy or do to make them work great
Which amp are you using? It has a line out and headphone out.

Screenshot_20200712-022711.png