Willing to spend like 300$

ue mega boom

sonos.com/en-us/shop/move
on sale rn for 300 @op

JBL charge 4, if it wasnt mono itd be the best ever

Sony SRS

Can't go wrong with JBLs. Just pick your size

Minirigs 2.1 set up is another option but it’s over $300 from what I’ve seen it’s the best sounding portable Bluetooth speaker set up and it’s module

JVC Kaboombox