I test Bluetooth speakers for a living and I’ve found the best Prime Day speaker deals from Bose, JBL, Marshall and more, starting from just $27

The JBL Flip 7 is small and powerful yet adamantly refuses to compromise on sound quality, particularly bass. There are very few minor things I’d change — let’s beef up that (admittedly still decent) battery life, enable stereo output on other JBL models, and crowbar in a low-latency mode for streaming and gaming.

Because it has been succeeded by a 5th-gen speaker, now's a great time to buy the JBL Xtreme 4 as it has been discounted by $130. It boasts customizable EQ, PartyBoost with AuraCast, and ear-splitting (in a good way) volume. We love its IP67 waterproofing, easy-to-use app, and the fact that it doubles as a power bank.

The JBL Go 5 boasts a wide soundstage packed into a compact, pocketable body. It looks great, sounds even better, and can be customized via a user-friendly companion app. It’s IP68-rated, so it’s highly waterproof, dustproof and drop-proof too.

A great addition to Bose's Bluetooth speaker lineup, the SoundLink Max delivers expansive stereo sound, a 20-hour battery life and is one of the most practical portable speakers for life on the move. It boasts a wide soundstage and can get very loud without music sounding distorted.

It’s slightly more expensive than the competition, but the Bose SoundLink Flex Gen 2 justifies its higher price with great sound quality and app connectivity. I think it looks great, too, and the new color options make for a super fashionable portable speaker.

The Marshall Emberton III is, in one word, epic. It is one of the brand's smaller speakers, but it packs solid sound into a very tasty-looking 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.

The Marshall Acton III is a retro-looking Bluetooth speaker that can actually make your setup feel more modern. The physical controls are tactile and satisfying, making sure it's easy for you to get the sound you want. Thanks to its large cabinet size and quality audio engineering inside, it's hard to be disappointed in the Acton III. The bass is also super responsive, making it a top-tier choice for parties.

The Stanmore III completes Marshall's Homeline III lineup, and it's perfect for small spaces as it measures just 13.78 x 8 x 7.4 inches. It packs Class D amplification rated at 50W for the single mid/woofer, while two 15W amps take care of the tweeters. It sounds incredible, and you should get it just for the rock 'n' roll design, in my opinion.

Thanks to a plethora of wired and wireless connectivity options, the Marshall Bromley 750 party speaker doubles (or triples) as a guitar amp and a karaoke machine, while delivering powerful sound quality when you’re listening to music. A massive 500W power output makes the bass sound loud and refined, while vocals are crystal clear.

The Tribit StormBox Lava packs a punch but won’t break the bank. The sleek design means it’s easily portable, while water- and dustproofing equip it for any situation. The bass will shake the ground around you, but it still manages to produce a well-rounded sound with crisp treble.

The Tribit StormBox Micro 3 offers an IP68 rating, a companion app for EQ customization (although some settings cause compression), and simple controls that make the speaker a breeze to use. It has 24 hours of battery life and can even be used as a portable charger. But most importantly, the audio performance really is excellent.

The Tribit StormBox Mini+ boasts powerful bass response and detailed vocals. It also sports reactive LED lighting that’s fun to watch, and IPX7 waterproofing so it can be used poolside or in the shower. For the money, I recommend buying two so you can take advantage of the dreamy stereo sound.

The EarFun UBoom L offers big sound on a budget. This portable speaker produces powerful bass, clear vocals and well-balanced sound across a range of genres. With a dedicated outdoor mode and an IP67 resistance rating, the speaker can soundtrack pool parties and hikes. It has great battery life, and the customizable EQ via the user-friendly companion app works really well.

The 8BitDo Retro Cube 2 is the quirkiest speaker around, and that’s down to its NES-inspired design and D-pad-style controls. 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.