Divoom outdoor2. 6 drivers design.Sound waves of true 15W. IPX 44 Rugged Design.You will be surprised.
Since you are looking for quality not quantity 2 good speakers will be better than 2.1 or 5.1 bad ones. A used stereo system would be your best bet. Have any relatives with old school stereo gear in the attic? Check local thrift shops and Craigslist.