The 6 best Bluetooth speakers to shop during October Prime Day

Who it's for:

The Ultimate Ears Wonderboom 4 is not a must-have upgrade for anyone who owns the Wonderboom 3, but like the former version, it's a powerhouse for its size and price. This speaker's small (and rugged enough) to take along for a hike, while traveling, and for tossing next to the pool. Plus, it's so easy to find on sale that it's often available at a cheaper price than the older Wonderboom 3. During Prime Big Deal Days, we expect it to drop back down around its record-low price of $79.99. With that said, if you miss the price drop during Prime Day, this speaker goes on sale frequently, shopping holiday or not.

Why we picked this:

The Wonderboom 4 is basically the same exact speaker as the Wonderboom 3, visually and internally. Like the Wonderboom 3, you can drop it from heights of up to five feet without worrying about destroying it. It’s also waterproof with an IP67 rating. If you drop it in water, it can float for up to 30 minutes and come out the other side working completely fine. It also features a healthy 14 hours of battery life, which is more than other speakers of a similar size.

So what's different? On the sound front, the Wonderboom 4 has less muddiness than its predecessor, especially at higher volumes. In addition to the Outdoor Boost mode, you'll also get a Podcast Mode. We will say that we're not necessarily fans of the new addition — hosts' voices came through compressed, while background static felt more pronounced. Generally, this mode shone much better on the brand's Everboom speaker.

However, the standard audio is good enough for listening to podcasts and music, so ignoring the new EQ feels like a fine concession. As with the Wonderboom 3, we found that overall, the sound profile is well-rounded and can get loud. We do wish that this speaker had been updated with a companion app for more customization.

On the bright side, it's very easy to plug, play, and now charge, thanks to the addition of a USB-C charging port. While it's not all that different from the Wonderboom 3, anyone who wants a no-frills speaker that sounds good will be happy with this one. The Wonderboom 4 is easy to find in stock and on sale, making it our updated pick for the best speaker under $100.

Check out our full review of the Sonos Move 2.

Who it's for:

If portability is at the top of your list when looking for a Bluetooth speaker, the Sonos Move 2 might not be for you. As Stan Schroeder writes in his review, "It sounds fantastic, but it's essentially a home speaker that also happens to be somewhat portable." However, if you want great sound, battery life, and smart features, this could be the best Bluetooth speaker for you. It's also the best choice for shoppers who already use other Sonos products in their home.

Why we picked this:

We formerly recommended the original Sonos Move, but we like the newer version for its newly added stereo sound and 24 hours of battery life (as compared to the original's measly 11).

To be clear, this speaker isn't perfect, but we think the trade-offs balance out. For instance, you need a 3.5mm to USB-C adapter for line-in playback, but you can charge your phone from the Move 2's battery by connecting it with a USB-C cable (similar to the Charge 5). It isn't very portable for hikes or trips to the beach, but it's easy enough to move from the kitchen to the backyard (and has IP56 dust and water resistance), making it great for entertaining. It's also a great choice if you like using a speaker to listen to music around the house. While it doesn't work with Google Assistant, it does work great with Alexa.

It can burn through the battery life faster at higher volumes, but it gets plenty loud without sacrificing sound clarity. In essence, there are a few trade-offs you make with this speaker, but if you're looking for the best-sounding smart speaker, and the cons of this one don't clash with your needs, we think the Sonos Move 2 is a great pick.

According to the price tracker camelcamelcamel, the Move 2 didn't go on sale during July's Prime Day sale, but it did drop down to a low price of $336 in June.

Who it's for:

There are portable speakers, and there are speakers that are truly built to move with you. The JBL Clip 4 isn't just small and easy to carry around, but also easy to clip on just about anything, from a backpack to a belt loop. So, if you're looking for the absolute best blend of portability, affordability, and sound, this is a smart bet.

It's no longer the newest speaker in JBL's Clip line, but that means it's more likely to go on sale. Ahead of Prime Big Deal Days, it's marked down to $59.95 on JBL's website, compared to the Clip 5's $69.95 sale price at Amazon.

Why we picked this:

This is the ultimate portable speaker — it's compact and thin enough to slip into basically any bag, some pockets, and it gives you a backup plan with the built-in carabiner.

Even though you're getting maximum portability, the speaker doesn't sacrifice on basic functionality: you're still getting 10 hours of battery life and an IP67-rated water- and dust-proof speaker that can be taken along on most adventures. When we tested this speaker, we found that it reached an impressive volume, but in comparison to a speaker like the Wonderboom 3, which is only about $20 more, the sound does get muddled at higher volumes. In other words, if sound is more of a priority, we'd say spring for the Wonderboom. If you want something something small but built for staying in one place, save a bit of cash and get the JBL Clip 4.

Check out our full review of the Sony ULT Field 1.

Who it's for:

Sony's entire ULT line was created for anyone who considers impressive bass a crucial part of their listening experience, and the Sony ULT Field 1 is no exception. For good bass that keeps things relatively affordable, we recommend the Field 1.

In the days leading up to October's Prime Day, the speaker is sitting at $98, its lowest price ever, in the off-white colorway. At the very least, we're hoping to see this price on the other three available colors, and if we're lucky, drop even more during the actual sale.

Why we chose this:

We're generally fans of the audio quality Sony delivers and we're always fans of saving money, so when we saw the brand released a speaker that's more on the affordable side, we needed to try it out. Deputy Shopping and Reviews Editor Miller Kern took up the task and found that this speaker delivers on bringing the bass.

This speaker already brings the bass on its default settings, but its two "ULT" settings — which can be controlled directly from a button on the speaker — allow you to amplify the bass even more. Kern wrote that in her testing, "regardless of volume or bass setting, it never sounded blown out or fuzzy." She also noted that this speaker gets loud, which makes it a great contender for anyone looking for an outdoor option, along with the fact that it's waterproof, dustproof, rustproof, and shockproof.

The more intense audiophiles among us will likely appreciate the customizable equalizer on this speaker's companion app, which isn't always a given at this price point. You might notice the shortcomings of this speaker most on its battery life, which caps out at 12 hours.

Who it's for:

If you don't need the most customized, crystal-clear sound and simply want a speaker that works and won't break the bank, the JBL Go 4 is an excellent option under $50.

Ahead of Prime Big Deal Days, it hasn't dropped in price, but it did go on sale during July's Prime Day (albeit only a few dollars). Still, this speaker is new to the market, so a small price cut isn't too surprising. Already, at full price, it's a great budget option, but we're hoping to see at least $5 get slashed off the full price during the days of the sale.

Why we picked this:

We previously recommended the JBL Go 2 speaker as our budget pick, and have been looking for an adequate replacement since it was discontinued. JBL just released the Go 4 in June, and after testing it out, we're happy to recommend it as our new budget option.

For starters, the Go 4 is just as lightweight and compact as its predecessor, with just a bit more silicone padding around the edges that adds minimum bulk, but gives the speaker a feeling of increased durability (also helped by its IP67 rating). Though it may be tiny, it's definitely mighty when it comes to how loud it can get: you probably won't feel the need to use the highest volume unless you're outdoors and in a noisy area. JBL improved on the bass clarity over the Go 2, as it came through noticeably more prominent on the Go 4 during our testing, without sounding overblown.

However, you are likely to notice the sound gets a little muddier at higher volumes, and especially so with more dynamic pieces — the Final Fantasy VII Remake soundtrack suffered a bit during our testing (the JBL Flip 5 we tested against the Go 4 handled the climatic moments in the soundtrack much better). Still, the Go 4 is only $50, so it's hard to complain too much, especially as during our testing, this speaker lasted a good two and half hours beyond its promised seven hours of battery life when played constantly at a low volume.