https://www.rtings.com/speaker/reviews/best/by-type/bluetooth-bass

https://www.independent.co.uk/extras/indybest/gadgets-tech/audio/best-bluetooth-speaker-portable-uk-b1775584.html

https://screenrant.com/best-bass-bluetooth-speakers

Going to choose:

https://www.amazon.co.uk/soundcore-Subwoofer-Waterproof-Floatable-Bluetooth-dp-B0CQ55VQH8/dp/B0CQ53RVTW/ref=dp_ob_title_ce?th=1