Adding a couple of links here for you to go through. Here’s a masterlist of all types of speakers ranked, so you’ll have to do some digging through these on your own to find what you want. https://www.reddit.com/r/WirelessSpeakers/comments/16zs2ol/ranking_all_battery_powered_wireless_speakers/ There’s this one too, shorter ranking, it looks a little bit of a marketing thing actually but gonna second the Trelab option its got. https://www.reddit.com/r/BuyitGuide/comments/1ew5al9/what_are_the_best_portable_bluetooth_speakers/ Surprisingly waterproof speaker. Always be a little sus of brands use “water resistant” instead of waterproof, cos then that means it can handle anything more than a couple of light splashes. Waterproof ones are actually gonna last after a full accidental dunk too. I don’t usually expect these off brandish ones to have actual IPX 7 waterproofing (fancy way of saying its been tested under multiple harsh jets of water), but hey this one does (linking the mid size one so it has a good bass to it on the boat). More on reddit.com

Bug questions: How big? How loud? How expensive? I have this Altec Lansing speaker that's great for rafting or the beach, but you can certainly do better if you're willing to spend more or go bigger. It's also big enough to be inconvenient on a kayak or canoe. More on reddit.com

Fully waterproof ip67 are many speakets today. Which size are you looking for? Jbl charge 5, Sony ult 3, soundcore boom 2, tribit stormbo blast 2 are all good options (the last one is quite big) More on reddit.com

Tribit stormbox blast is the best bang for your buck. It’ll def be more powerful than the turtle box. Turtle boxes have little bass and are a mono speaker. This is not good for audio quality. The Tribit has two woofers and two tweeters. It will sound better and more full at a fraction of the price. If you want a name brand. Check out Harmon Kardon’s eBay page. They own JBL and sell new and factory refurbished speakers with warranties for a huge discount. The reviews say they look brand new. You can get a refurbished boombox 2 for $240. I would say a jbl Partybox but they are not waterproof. Just water resistant. I wouldn’t want to worry about that while jamming on a boat. More on reddit.com