I test Bluetooth speakers for a living and my favorites from JBL, Tribit and Marshall are on sale for Prime Day — starting from just $27

Though it's tiny, it's supremely powerful, and you'd be surprised at how loud the Tribit StormBox Mini+ can get. It's very easy to recommend even at its full price, thanks to the powerful bass response and detailed mids. It sports reactive LED lighting that's fun to watch, and IPX7 waterproofing means it can be used poolside. I'd recommend buying two at this price so that you can take advantage of the dreamy stereo sound.

The JBL Go 5 is my favorite small speaker, period. The brand is the king of speakers, so it's no surprise that the Go 5 warrants a recommendation. If you want to soundtrack pool parties or take a speaker on a picnic, the Go 5 is excellent. It boasts a wide soundstage packed into a compact, pocketable body. It's IP68-rated, too, so it's highly waterproof, dustproof and drop-proof.

I’ve never seen a speaker as cute and quirky as the NES-inspired 8BitDo Retro Cube 2. From its catchy “8BitDoooo” startup sound to its D-pad style controls, this speaker oozes whimsy and charm. The speaker comes with a wireless charging dock with a slot to store the 2.4GHz dongle safely, and it boasts class-leading battery life of 30 hours. Crisp treble and a refined midrange make the speaker shine.

I haven't personally reviewed the Tribit StormBox Micro 3 but my colleague, Ashley, raved about it in her review. This speaker offers an IP68 rating, a user-friendly companion app for EQ customization, and 24 hours of battery life. It can be used as a portable charger, too. Audio performance is excellent for such a small and budget-friendly speaker.

The Marshall Emberton III is nothing short of epic. Though it's one of the brand's smallest speakers, it packs solid, loud sound into a very tasty-looking and suave design. From the control knob found on loads of Marshall gear to the impactful sound, the Emberton III is a great Bluetooth speaker if you’re looking for something unique and stylish.

At its retail price, the Bose SoundLink Flex (2nd Gen) is a little hard to justify, which is why this October Prime Day deal makes this a must-have. With great sound quality and app connectivity, the SoundLink Flex (2nd Gen) is a wonderful speaker. It looks fantastic and classy, and the colorful design makes for a fashionable portable speaker.

If you want a party speaker that doubles or triples as a karaoke machine and an amplifier, look no further than the Marshall Bromley 450 with its plethora of wired and wireless connectivity options. Music sounds glorious and highly detailed across genres, while Auracast works like a charm to hook up multiple speakers across rooms. Oh, and the reactive LED lighting helps with your immersion. 40-hour battery life and IP55 waterproofing make it a winner.