Anything but a big ass receiver, i dont have the room for it. Would an amp or an audio interface be sufficient. Itd be in the living room so no computer either.

Some bookshelf speakers have a phono input or RCA you can plug directly into

yeah if they're none powered there is no direct RCA or 3.5nm so you could just use any cheap amp

amazon.com/dp/B01FZKA28Y/ref=cm_sw_r_cp_apa_fabc_iMBQFb5F11P18

depends if they are powered or not, if you don't want a reciever then you need to get powered speakers, if you are going this route you are most likely going to need a rca to 1/4 jack adapter.

Adapter:
amazon.com/VCE-6-Pack-6-35mm-Female-Adapter/dp/B0727VZXP5/ref=sr_1_3?crid=1C6KF1JX3Y11H&dchild=1&keywords=rca+to+quarter+inch+adapter&qid=1604965904&s=electronics&sprefix=rca+to+quarte%2Celectronics%2C218&sr=1-3

do you know what speakers you are going to get?