At nearly half off its $99.99 retail price, the WONDERBOOM 4 is sitting at $51 right now on Amazon, and according to price tracking tools, that’s the lowest it has ever been. That matters, because this speaker has a habit of going on sale – but usually bottoms out around $59.99, which was already considered a good price when it showed up briefly last December. Hitting $51 is a genuine milestone for this one, not the kind of “sale” that just resets the inflated anchor price.

So is it worth it? That depends on what you actually need from a portable speaker – but for the right buyer, this deal makes a lot of sense.

What you’re getting

The WONDERBOOM 4 is Ultimate Ears’ compact, puck-shaped portable Bluetooth speaker. It’s been around since early 2024, and it’s essentially a refinement of a formula the company has been perfecting for years. The key upgrade in the 4th generation was the switch to USB-C charging, which sounds minor but genuinely matters when every other device you own already uses USB-C. There’s also a new “Podcast” mode that adjusts the audio profile for voice – a small but thoughtful addition for people who actually listen to podcasts on speakers instead of headphones.

Sound-wise, the WONDERBOOM 4 pumps audio through two 40mm active drivers and two passive radiators, delivering 360-degree sound at up to 86 dBC in standard mode and a slight bump to 87 dBC with Outdoor Boost enabled. That’s not going to shake a room, but it’s genuinely enough output for a kitchen counter, a poolside table, or a campsite. The omnidirectional design means you’re not fighting over where to point it – everyone in a circle gets roughly the same sound.

Battery life is rated at 14 hours, and independent testing by Tom’s Guide has confirmed that number holds up pretty well in real-world use. For a speaker this size, 14 hours is solid – it’ll last a full day trip without you thinking twice about charging.

Built for the outdoors, no caveats

The WONDERBOOM 4 carries an IP67 rating, which means it’s fully dustproof and can be submerged in up to one meter of water for 30 minutes without issue. It also floats, which is one of those specs that sounds like a marketing gimmick right until the moment you knock it into the pool and it bobs right back up to the surface. The build is also impact-resistant, meaning accidental drops on hard floors or concrete aren’t going to leave you with a cracked speaker.

This isn’t a speaker that tolerates the outdoors – it’s genuinely designed for it. Bluetooth range extends to 131 feet (40 meters), so you’re not tethered to your phone while moving around a yard or a campsite.

Who this is actually for – and who should look elsewhere

Honest answer: the WONDERBOOM 4 is best for people who want a tough, go-anywhere speaker that sounds decent without any fuss. If you’re someone who just wants music playing while you cook, shower, camp, or hang out near a pool, this checks every box cleanly.

If you’re an audiophile looking for deep bass extension or studio-quality clarity, look elsewhere – and you probably already know that. The frequency response starts at 80Hz, so it won’t give you much in the low end. Reviewers on SoundGuys noted the sound quality as average in critical listening terms, while praising the durability and ease of use. That trade-off is the whole premise of this category – you’re paying for ruggedness and portability, not audiophile fidelity.

It’s also worth knowing the WONDERBOOM 4 has no smart assistant support and no wired audio input – it’s purely Bluetooth. That’s not unusual for this class of speaker, but if you’re hoping to plug it into something directly, you can’t.

How it stacks up against the competition

The obvious comparison at this price point is the JBL Clip 5, which typically retails for $79.95 and is currently available at similar discounts. The Clip 5 is lighter, has a built-in carabiner for clipping to a bag, and actually comes in more color options. The WONDERBOOM 4, on the other hand, delivers fuller 360-degree sound and slightly better battery life at 14 hours versus the Clip 5’s 10.

TechRadar‘s hands-on comparison put the Clip 5 ahead for portability and the WONDERBOOM 4 ahead for raw sound presence. At $51 versus whatever the Clip 5 is running right now, the WONDERBOOM 4 wins on value – you’re getting more speaker for less money, if you don’t mind the slightly bulkier form factor.

The WONDERBOOM 4 at full price is a reasonable but hard-to-enthusiastically-recommend speaker at $100. At $51, it becomes an easy recommendation for anyone who wants something durable, simple, and actually waterproof – not just water resistant – without spending a lot of thought on it.

Disclaimer: Prices and promotions mentioned in this article are accurate at the time of writing and are subject to change based on the retailers’ discretion. Please verify the current offer before making a purchase.