The EarFun UBOOM X is a portable Bluetooth speaker built for the outdoors, combining a promised 30 hours of playback with 80W of stereo output driven by a 4-driver design and EarFun's JumboBass tuning. It features Bluetooth 5.3 connectivity, a TWS/Party Connect mode that lets you link up to 50 units, and full IP67 waterproof and dustproof protection. It has a built-in LED light show and a carry handle and strap for portability, and it offers the ability to act as a power bank for your other devices. The UBOOM X is positioned as a rugged, feature-rich party speaker that's just as at home indoors as out.
Our Verdict
The EarFun UBOOM X is decent for listening to music. Its sound profile is generally pretty balanced, if a little uneven in the bass and mid-range. That's to be expected from an affordable, boombox-style speaker, and shouldn't deter you from considering this if you're shopping at this price point. The gentle roll-off of the highest frequencies ensures the sound isn't too harsh or piercing, and this speaker gets loud enough to fill large rooms with sound, which is impressive for its form factor, though you do sacrifice some low-end punch at the highest volumes. It comes with over 30 EQ presets so you can find a sound you like, and includes some specially designed presets that take advantage of both EQ and dynamics processing. That said, we think the default sound is a great starting point. You'll want to position this speaker facing you, as its forward-facing drivers can sound a little muffled if you're positioned behind them.
Over 30 EQ presets and a 10-band graphic EQ.
Reaches up to 95 dB at max volume.
Forward-facing drivers means sound varies with your listening position.
Noticeable compression at max volume.
The EarFun UBOOM X is passable for watching movies and videos. Out of the box, it offers a pretty balanced sound profile that you can change via its 30+ presets. And it gets loud enough to fill a large living room with sound, although sounds like kick drums will lose punch in the bass range at max volume. It can playback stereo audio without downmixing to mono, so stereo effects like long reverb tails in epic synth movie scores will still sound exciting. That is, so long as you're positioned in front of the speaker, as its forward-facing design means the sound is noticeably different from behind. Unfortunately, even with its included Video Mode activated, latency is still high, so you may notice lip-sync issues. That said, different apps and devices compensate for latency in different ways.
39-hour battery life.
Reaches up to 95 dB at max volume.
Forward-facing drivers means sound varies with your listening position.
Noticeable compression at max volume.
The EarFun UBOOM X is satisfactory for listening to podcasts. It offers a mostly accurate mid-range, so voices sound life-like and are easy to understand. It gets loud enough for you to hear from across the room, and the included carrying strap means you can take it from room to room while cleaning up before a party. Unfortunately, its somewhat limited directivity means the sound can change noticeably depending on where you’re sitting or standing in relation to the speaker.
Over 30 EQ presets and a 10-band graphic EQ.
Reaches up to 95 dB at max volume.
Forward-facing drivers means sound varies with your listening position.
Noticeable compression at max volume.
The EarFun UBOOM X doesn't come with a built-in voice assistant, but you can control your phone's built-in Siri, Google Gemini, or Google Assistant using the speaker's mic. The mic does an amazing job picking out your voice from a few meters away and in noisy environments. So you can set it up near your grill station while hosting a garden BBQ and control your phone hands-free. However, you should try and keep the speaker facing you, as its front-facing drivers sound slightly muffled when you're listening from behind it.
IP67 rating keeps the speaker safe from the elements.
Mic offers excellent performance.
Forward-facing drivers means sound varies with your listening position.
Noticeable compression at max volume.
The EarFun UBOOM X is good for use outdoors. It has a great build quality, with an IP67 rating that will keep the rain and dust out during park hangs. It feels sturdy and has a handy carrying strap, so you can easily carry it around with you or hang it from a nearby tree branch. With a battery life that lasts around 39 hours off a single charge, you can take this speaker on a camping trip without worrying about the battery dying. It has a decently balanced sound profile that gets loud enough to soundtrack a garden hangout, though it lacks the bass to get your friends dancing to the thump of a techno kick drum. Since it has forward-facing drivers, you'll also want to be positioned in front of it for best results. While it lacks multipoint pairing, its Bluetooth connection has a good range, so you can wander away from the speaker without the music dropping out.
Over 30 EQ presets and a 10-band graphic EQ.
39-hour battery life.
Reaches up to 95 dB at max volume.
IP67 rating keeps the speaker safe from the elements.
Forward-facing drivers means sound varies with your listening position.
Noticeable compression at max volume.
Check Price
Differences Between Sizes And Variants
The EarFun UBOOM X comes in a single color variant: 'Black' (here's a picture of our unit's label).
If you encounter another variant of this speaker, please let us know in the comments.
Popular Speaker Comparisons
The EarFun UBOOM X sits in the same incredibly competitive price range as popular portable speakers like the Anker Soundcore Motion Boom Plus, the Tribit StormBox Blast, the JBL Flip 7, and the Ultimate Ears MEGABOOM 4. This price range tends to serve two different niches that aren't always compatible with one another: loudness and portability. In terms of output volume, the EarFun is closest to the Anker and Tribit. They share a boombox-style design and get loud enough to fill larger rooms with sound. Compared to these, the JBL and Ultimate Ears are much more portable and easier to toss in a bag, but they can't get as loud. Where the EarFun really shines is battery life: it offers a remarkable 39 hours of continuous playback time, which easily surpasses all the others. You can also use it as a battery pack to charge your other devices via USB and use it with your phone's voice assistant, making it a very versatile option.
Learn more about how to choose a Bluetooth speaker in our buying guide, or check out our recommendations for the best portable Bluetooth speakers, the best outdoor speakers, and the loudest Bluetooth speakers.
The EarFun UBOOM X is a slightly better Bluetooth speaker than the Tribit StormBox Blast, with a couple of caveats. They're similarly sized boombox-style portable Bluetooth speakers, but the EarFun is a bit lighter, making it easier to carry, and also has a sturdier, dust-proof build quality. You can also use your phone's voice assistant with the EarFun, and it has a slightly longer battery life. On the other hand, the Tribit supports Bluetooth multipoint with up to two devices, and its soundstage feels a bit more immersive.
The EarFun UBOOM X is a better portable boombox-style speaker than the Anker Soundcore Motion Boom Plus, though the differences are slight. The speakers are very similar in size and price and have almost identical max volumes. That said, the EarFun has a battery life that's almost four times as long as the Anker, and its built-in mic does a much better job picking up your voice in noisy environments. The main reason to choose the Anker is its support for Bluetooth multipoint, allowing you to connect your phone and laptop to the speaker simultaneously.
The EarFun UBOOM X and the Anker Soundcore Motion X600 perform remarkably similarly, though each has distinct strengths. The Anker is smaller, making it easier to carry around with you. Subjectively, its design also looks better indoors, along with your other furniture. That makes sense, as it doesn't have a dust-proof rating, unlike the EarFun, which is sealed to dust ingress (although both will withstand submersion in water up to 1 meter in depth). The EarFun's battery life is roughly four times that of the Anker, but its latency is noticeably higher. In general, if you're looking for a park hang companion, go with the EarFun, and if you want a portable speaker to carry with you from room to room, go with the Anker.
Though similarly priced, the EarFun UBOOM X and the JBL Flip 7 serve different use cases. The EarFun is a fairly chunky, boombox-style speaker. Its built-in handle makes it portable enough to carry in one hand, but it's not something you can easily toss in a bag like the JBL. That size difference affects how the speakers perform, too. The EarFun gets much louder and has a much longer battery life. On the other hand, the JBL's IP68 rating beats the EarFun's IP67, and it supports Bluetooth multipoint. It comes down to use case: if you need to pump up the jams by the hockey rink, the EarFun is the way to go, and if you need a nimble, versatile friend to accompany you on your travels, choose the JBL.
Test Results
The EarFun UBOOM X has a medium-sized, rectangular design that gives it a boombox-style appearance. It slightly resembles the Anker Soundcore Motion Boom Plus. The speaker is meant to be placed horizontally, with two large front-facing drivers accented by RGB LED rings that pulse and change color during playback. It's available exclusively in Black. Its matte plastic build features a hard top handle for easy carrying and two metal hooks at each end for attaching the included shoulder strap.
The EarFun UBOOM X is a moderately sized Bluetooth speaker that's still easy to move around, thanks to its built-in handle and adjustable carrying strap. You can comfortably hold it in one hand when on the go, and because it runs on battery power, you can use it anywhere without needing to stay plugged into an outlet.
The EarFun UBOOM X has a great build quality. Its body is made entirely of hard plastic, with a metal front grille that protects the drivers from impact. Four rubber feet on the bottom keep it stable and prevent slipping when placed on flat surfaces. The handle feels sturdy despite being plastic, with a textured underside for extra grip, and two metal hooks on top that are used to attach the included adjustable fabric strap. Around the back, the AUX and USB-C ports are housed beneath a thick rubber flap, helping maintain the speaker's IP67 dust and water resistance.
The EarFun UBOOM X has very good controls. They're laid out across the top of the speaker, featuring rubberized buttons that are clicky and textured. The setup includes controls for power, Bluetooth, volume, play/pause, and dedicated buttons for lighting effects and Party/Stereo mode. You can view the full list of controls in this screenshot of the manual. You press the Bluetooth button to enter pairing mode, hold play/pause to activate your phone's voice assistant, or use the multi-speaker button to switch between Party and Stereo modes. Holding Bluetooth + Play/Pause resets the speaker, while a 10-second hold of the Power button forces a reboot.
In terms of feedback, a row of battery indicator dots above the play/pause button helps track charge levels, and the power button lights up when the speaker is on. You also get helpful audio cues for powering on/off, pairing, connecting devices, and setting up multi-speaker modes. The only notable omissions are a volume indicator or an alert when you reach the minimum or maximum volume.
The EarFun UBOOM X has decent frequency response accuracy. There's a little unevenness in the bass and mid-ranges, which can make some pitches in basslines and lead instruments jump out of the mix unnaturally. But for the most part, your audio sounds accurate. The treble range is smooth with a gentle roll-off in the highest frequencies that ensures the lack of low bass doesn't leave your audio sounding unnecessarily harsh or piercing.
This speaker comes with over 30 extra EQ presets. We measured a selection of these. This speaker also comes with a selection of presets designed by Oluv that incorporate EQ and dynamics processing. We measured the frequency response of all of these and also performed a dummy run of all of our sound testing categories using the Oluv Studio preset. Subjectively, we found the Default EQ preset to sound more balanced and fuller than Oluv's Studio preset. It's worth noting that the Oluv Studio preset uses processing that takes into account the equal loudness contour, as these measurements show. Oluv's presets can cause dropouts when this speaker is paired with another unit, and you can purchase a fix for that issue via Oluv's Patreon.
This speaker has an okay soundstage. It plays back stereo audio without downmixing to mono, which means details like delay feedback tails still sound present in the mix. But since it has front-facing drivers, the audio sounds different depending on your listening angle. If you're behind the speaker, the sound will be a little muffled compared to being in front of it.
This speaker has decent dynamics performance. It gets loud for its size, making this a good choice for larger outdoor hangs or filling larger indoor rooms with sound. That said, at its max volume, there's a fair bit of compression in the bass region, so this speaker won't get a dance party started like a larger PA-style system such as the JBL PartyBox Stage 320.
The EarFun UBOOM X has superb battery performance. EarFun advertises up to 30 hours of playback on a single charge, though we measured just over 39 hours (with the LED lights running) in our tests. It also charged in about 3.5 hours, well within the brand's claim of under six hours (with the exact speed dependent on the output capacity of your charger).
The speaker automatically powers off after 30 minutes of inactivity when no device is connected, and you can adjust this setting in the companion app. EarFun notes that using Oluv's Studio EQ may reduce playtime, but our tests showed nearly identical endurance of around 39 hours. That said, when using Oluv's preset, we encountered a minor playback bug roughly 23 hours into both tests we ran, which required resuming playback manually.
The EarFun UBOOM X doesn't have a built-in voice assistant, but since it has a built-in mic, you can use your phone's Google Assistant, Google Gemini, or Siri. Simply press and hold the Play/Pause button on the speaker to trigger them. While there's no voice activation, the speaker's microphone performance is excellent. It can clearly pick up commands from across the room and in noisy environments.
The EarFun Audio app offers a wide range of customization options for the EarFun UBOOM X, including over 30 EQ presets, a 10-band graphic EQ, a battery percentage indicator, Video Mode, lighting controls, voice prompt settings, auto shutdown timing, and a factory reset option. Check out this video we took of the app in action.
While the app doesn't include a direct control for Stereo Pairing Mode, you can still activate it manually by long-pressing the Multi-Speaker button on the speaker itself.
It's worth noting that some of Oluv's presets can cause stuttering issues in TWS mode. You can purchase custom firmware through Oluv's Patreon, which is meant to address this, but we haven't tested this ourselves.
The EarFun UBOOM X includes a 3.5 mm AUX input, letting you connect devices directly with a cable if you don't want to use Bluetooth. It also has two USB-C ports on the back: one dedicated to charging the speaker itself and another that functions as a power bank output for charging devices like your phone. That said, there's no USB audio playback support.
The EarFun UBOOM X uses Bluetooth 5.3 and offers a good connection range, so you can wander away from the speaker at the beach without your audio cutting out. That said, it doesn't support Bluetooth multipoint, meaning you can only connect to one device at a time. Although the included Video Mode is designed to lower latency, it only makes a small improvement, and the delay remains high enough that it could cause lip-sync issues when watching videos. However, your experience can vary, as some apps and devices compensate for latency in different ways.