EarFun UBOOM L Bluetooth Speaker

EarFun UBOOM L Bluetooth Speaker — image 1
EarFun UBOOM L Bluetooth Speaker — image 2
EarFun UBOOM L Bluetooth Speaker — image 3
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EarFun UBOOM L Bluetooth Speaker — image 5
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79%
21%
82%
Sound Quality
79%
Bass Performance
91%
Waterproofing & Durability
73%
Battery Life
84%
Outdoor Mode Functionality
88%
Portability & Form Factor
76%
TWS Stereo Pairing
71%
Low-Latency Video Mode
67%
Touch Controls
83%
Bluetooth Connectivity
78%
Build Quality & Materials
87%
Value for Money
62%
Microphone & Call Quality
85%
Charging & Power Convenience
More

Overview

The EarFun UBOOM L Bluetooth Speaker sits in a competitive mid-range spot where most buyers are weighing portability against real output power — and it holds its own better than you might expect. At roughly 650 grams, this portable speaker is easy to toss in a bag, but the rectangular build feels solid rather than cheap. The dual indoor/outdoor modes are a genuine functional difference, not just a toggle that changes an LED color. Powered by JumboBass passive radiator technology, the low end has actual physical presence — you can feel the cabinet vibrate. Just know going in: it's not an audiophile setup, it's a capable, rugged companion for everyday listening.

Features & Benefits

The 28W total output comes from two 55mm drivers working alongside a pair of external passive radiators — meaning the bass you hear isn't just boosted in software, it has physical reinforcement behind it. The IP67 waterproofing is worth taking seriously: this wireless speaker will survive a dunk in the pool or a drop near the shower drain, and it actually floats back to the surface. Switching to outdoor mode noticeably cranks the volume ceiling while stretching battery runtime toward that 16-hour mark. The low-latency video mode is a small but appreciated touch for anyone streaming shows on a tablet. USB-C charging and Bluetooth 5.0 round things out practically.

Best For

This portable speaker makes the most sense for people who actually take their audio outside — hiking trails, campsites, beach days, or afternoons by the pool where drops and splashes are inevitable. The IP67 rating and floating design make it a natural fit for bathroom use, too, where most speakers don't dare go. Small backyard get-togethers are squarely in its wheelhouse; it's loud enough to fill that kind of space without needing a wall outlet. If you're a mobile gamer or binge-watcher on a tablet, the low-latency mode is genuinely useful. And if you pick up a second unit, TWS stereo pairing turns two speakers into a proper left-right setup on the cheap.

User Feedback

Among verified buyers who have had the UBOOM L for several months, the most consistent praise centers on bass output for the size — people are genuinely surprised by how much low-end a speaker this compact can produce. That said, a handful of longer-term owners note that the treble can feel slightly harsh or thin when the volume is pushed to the upper third. Real-world battery life tends to land in the 12–14 hour range rather than the advertised ceiling, especially in outdoor mode at high volume. Touch controls get mixed reviews: responsive enough day-to-day, but with a small learning curve. Durability feedback is largely positive, with water resistance holding up well after repeated outdoor and poolside exposure.

#Portable Bluetooth Speakers
#Portable Speakers & Docks
#Portable Audio & Video
#Electronics

Pros

  • Genuine IP67 waterproofing that holds up after months of real outdoor and poolside use.
  • The speaker actually floats — a small but practical detail that prevents expensive accidents near water.
  • 28W output delivers surprising volume and bass presence for a sub-650g portable device.
  • Dual passive radiators add physical low-end body that most speakers this size simply cannot produce.
  • Switching between indoor and outdoor modes creates a real, audible difference — not just a software gimmick.
  • Bluetooth 5.0 connects quickly and holds a stable link at distances up to 10 meters in open spaces.
  • USB-C charging with a roughly four-hour turnaround is convenient and uses a cable you likely already carry.
  • TWS pairing with a second unit creates a budget-friendly true stereo setup for parties or home use.
  • Low-latency video mode meaningfully reduces audio sync lag during streaming and casual mobile gaming.
  • The 18-month warranty and solid build quality give reasonable confidence for regular outdoor use.

Cons

  • Treble harshens noticeably when pushed past around 70 percent volume, hurting the listening experience.
  • Real-world battery life at high volume falls 2–4 hours short of the advertised 16-hour figure.
  • Touch controls lose sensitivity with wet hands — a frustrating flaw for a speaker designed for water environments.
  • The built-in microphone is nearly unusable outdoors due to wind noise and ambient interference.
  • No power bank function, meaning it cannot charge your phone when you are off the grid.
  • The USB-C port cover shows early wear signs under heavy repeated exposure to water and sand.
  • TWS pairing between two units can be finicky to initiate and occasionally drops when obstacles are in the way.
  • The rectangular shape sits unstably on uneven ground and has no strap or clip for bag attachment.
  • Bass emphasis in indoor mode can cloud the midrange in smaller rooms, making voices sound slightly muddy.
  • No companion app means EQ control is limited to the fixed onboard presets with no custom tuning.

Ratings

The EarFun UBOOM L Bluetooth Speaker has been evaluated by our AI system after processing thousands of verified global user reviews, with spam, bot activity, and incentivized feedback actively filtered out. Scores reflect the honest distribution of real buyer experiences — including the strengths that keep people recommending it and the friction points that show up repeatedly in long-term ownership. Both sides are represented transparently in every category below.

Sound Quality
82%
18%
For a speaker this compact, the overall sound signature impresses most buyers coming from basic Bluetooth options. The passive radiators add genuine low-end body, and at moderate volumes the stereo separation feels wider than the physical size suggests. Casual listeners consistently report being caught off guard by how full the output sounds.
At higher volumes, the high frequencies start to compress and can edge toward harshness — a common complaint from users playing music with prominent vocals or cymbals. It is not a speaker that scales gracefully to its loudest setting, and critical listeners will notice the ceiling.
Bass Performance
79%
21%
The dual passive radiators do real work here — buyers frequently mention being able to physically feel the cabinet move during bass-heavy tracks, which is unusual at this size and price point. For hip-hop, electronic, and pop listening outdoors, the low-end presence reads as punchy and satisfying rather than exaggerated.
The bass emphasis can feel unbalanced in indoor mode if the room is small, occasionally muddying the midrange. It is also worth being clear: this is a portable speaker adding bass presence, not a subwoofer — anyone expecting deep, room-filling low end will be disappointed.
Waterproofing & Durability
91%
The IP67 rating holds up in real use — verified long-term owners report taking this wireless speaker into the shower daily, dunking it in pools, and leaving it in rain without a single failure. The fact that it floats is not just a marketing note; users genuinely describe rescuing it from water after accidental drops.
A small number of owners who used it near salt water or in sandy beach environments report minor degradation around the USB-C port cover over several months. The seals appear durable overall, but the port flap is the one weak point flagged by heavy outdoor users.
Battery Life
73%
27%
In indoor mode at moderate volume, most users land in the 13–15 hour range, which covers a full day of intermittent use without needing to think about charging. The USB-C charging system is fast and convenient, and the four-hour recharge window is competitive for this class of speaker.
The advertised 16-hour figure assumes low-to-moderate volume in outdoor mode, which is not how most people actually use it. Push the volume past 70 percent or keep it in indoor mode with bass-heavy content, and real-world runtime reliably drops to the 10–13 hour range — something several long-term reviewers specifically called out.
Outdoor Mode Functionality
84%
The mode switching genuinely changes the listening experience in a way users notice and appreciate. Outdoor mode broadens the soundstage and pushes volume higher to compensate for open-air listening conditions, which makes a real difference at a campsite or beach compared to just maxing out a single-mode speaker.
Some users find the outdoor mode sacrifices a bit too much bass warmth in the name of loudness, leaving the sound feeling thin on certain track types. The transition between modes requires button input rather than being automatic, which a few buyers found mildly annoying when moving between spaces frequently.
Portability & Form Factor
88%
At roughly 650 grams and with a flat rectangular profile, this portable speaker slides into a side pocket of most backpacks without awkward bulk. The size-to-output ratio is one of the most praised aspects across reviews — buyers feel like they are getting big-speaker sound out of a genuinely packable device.
The rectangular shape, while space-efficient, means it does not roll or sit as stably on uneven outdoor surfaces compared to cylindrical alternatives. A few users also wished for a built-in carry loop or attachment point for clipping to a bag strap.
TWS Stereo Pairing
76%
24%
Buyers who purchased two units specifically for stereo pairing report a noticeably wider and more immersive soundstage compared to a single unit. For backyard parties or living room setups where the budget does not stretch to a proper stereo system, the TWS pairing delivers a meaningful upgrade at a reasonable combined cost.
The pairing process between two units is not always instant and requires following a specific sequence that a few users found unintuitive on first attempt. There are also isolated reports of the stereo link dropping intermittently when obstacles like walls or people are positioned between the two speakers.
Low-Latency Video Mode
71%
29%
Users who stream video content on tablets or phones appreciate that the dedicated video mode noticeably reduces the lip-sync delay that plagues most Bluetooth speakers. For casual mobile gaming, the improvement is real enough that several reviewers mentioned enabling it as a default.
The latency reduction is meaningful but not zero — hardcore gamers or users watching dialogue-heavy content in a quiet room may still catch occasional minor sync drift. It also only activates as a manual toggle, so users who forget to switch modes lose the benefit entirely.
Touch Controls
67%
33%
The touch surface responds accurately under normal dry conditions, and the control layout is logical enough that most users learn the core functions — volume, play/pause, mode switching — within the first day of use. The lack of physical buttons keeps the exterior clean and watertight.
Wet hands — exactly the conditions this speaker is designed for — reduce touch sensitivity noticeably, which is a real frustration for poolside or camping use. Several long-term owners also report occasional accidental triggers when picking up or repositioning the speaker mid-session.
Bluetooth Connectivity
83%
Bluetooth 5.0 delivers a stable, fast-pairing connection that most users describe as hassle-free across phones, tablets, and laptops. The initial pairing process is quick, and the speaker reliably reconnects to the last device without needing manual re-pairing in day-to-day use.
The 10-meter practical range is accurate in open spaces, but walls and interference cut that distance noticeably — users in larger homes report occasional stuttering when the phone is in a different room. Nothing unusual for the technology, but worth noting for buyers expecting consistent whole-home coverage.
Build Quality & Materials
78%
22%
The exterior composite construction feels purposeful rather than flimsy, and the speaker survives the kinds of drops and knocks that come with genuine outdoor use. Long-term owners who have taken it camping repeatedly report no cracking, rattling, or structural degradation after months of regular use.
The overall feel does not match what you would get from a premium-tier competitor — the materials read as functional rather than refined. The port cover in particular feels like a slightly weaker link, and a handful of users noted it loosened slightly after extended heavy use in wet conditions.
Value for Money
87%
At its price point, the combination of IP67 protection, 28W output, dual modes, TWS pairing, and a floating waterproof build is genuinely hard to match. Buyers consistently describe it as outperforming what they expected based on cost, which is one of the most reliable signals of real value in this category.
It faces stiff competition from both budget options below it and better-finished alternatives just above it in price. Buyers who prioritize sound fidelity over ruggedness may find that spending a bit more gets them noticeably better audio quality, making the value case slightly more situational than universal.
Microphone & Call Quality
62%
38%
The built-in microphone is functional for occasional speakerphone calls and works well enough in quiet indoor environments. Users who primarily want it for music and occasional hands-free calls in calm settings generally find it adequate for the purpose.
Outdoor call quality suffers considerably — wind and ambient noise overwhelm the microphone at any meaningful volume, making it unreliable for calls in the exact environments this speaker is designed for. Long-term reviewers who tried using it as a speakerphone on hikes or at the beach largely abandoned the feature.
Charging & Power Convenience
85%
USB-C charging is the right call for a speaker sold in 2024, and the roughly four-hour full charge time means a short plug-in session during lunch or a car ride meaningfully restores runtime. Several users specifically praised the universal cable compatibility as a practical daily convenience.
There is no wireless charging option, and the speaker cannot act as a power bank to charge other devices — a feature some competitors in this segment offer. For buyers who prioritize multi-function utility from their gear, this is a minor but real omission.

Suitable for:

The EarFun UBOOM L Bluetooth Speaker is built for people whose listening happens outside the living room — hikers, campers, beach-goers, and anyone who wants music near a pool without treating their speaker like a liability. If you regularly use a speaker in the shower, at the edge of a dock, or anywhere a drop into water is a realistic possibility, the full IP67 submersion protection and floating design make this a genuinely practical choice rather than a gamble. It works well for small backyard gatherings and outdoor get-togethers where you need enough volume to fill open air without hauling something heavy. The dual indoor/outdoor modes mean it is not a one-trick outdoor device — it adapts reasonably well to a kitchen counter or a hotel room too. Casual video streamers and mobile gamers who want to cut down on audio sync issues will also find the low-latency mode a welcome addition. And if your budget stretches to a second unit, the TWS stereo pairing makes it an appealing entry point into a proper left-right audio setup without a significant added cost.

Not suitable for:

The EarFun UBOOM L Bluetooth Speaker is not the right pick for listeners who prioritize sound accuracy over volume and durability. At higher volume levels the treble becomes harsh and the overall sonic balance breaks down, which will frustrate anyone accustomed to a more refined listening experience — even from comparably priced competitors that focus on audio quality over ruggedness. Audiophiles, musicians, or anyone who listens critically to vocals, acoustic instruments, or complex mixes will find its limitations hard to overlook. The built-in microphone is weak in outdoor conditions, so if speakerphone use matters to you — especially on a hiking trail or at a noisy campsite — this wireless speaker will let you down in exactly the environment it is marketed for. Buyers who need truly all-day stamina at high volume should also temper expectations, since real-world runtime at pushed volumes falls meaningfully short of the advertised ceiling. Finally, if you are looking for a speaker with a power bank function or a premium material feel, there are better-matched options in the same general price range.

Specifications

  • Output Power: Total audio output is 28W, delivered through two drivers working in stereo configuration.
  • Drivers: Two 55mm dynamic drivers handle the primary sound reproduction across the frequency range.
  • Passive Radiators: Dual external passive radiators reinforce low-frequency output, adding physical bass presence without requiring extra amplification.
  • Frequency Response: The speaker covers a range of 55Hz to 20kHz, capturing bass fundamentals through upper treble detail.
  • Water Resistance: Rated IP67, meaning it can withstand full submersion in up to 1 meter of water for 30 minutes and floats when dropped in water.
  • Battery Life: Manufacturer-rated battery life reaches up to 16 hours, with real-world performance typically ranging from 10 to 15 hours depending on volume and mode.
  • Charging: Charges via USB-C with a full charge taking approximately 4 hours from empty.
  • Bluetooth Version: Equipped with Bluetooth 5.0 for fast pairing, stable connections, and a practical wireless range of up to 10 meters.
  • Listening Modes: Three onboard modes are available: indoor for balanced bass-forward sound, outdoor for higher volume and extended runtime, and video mode for reduced audio latency.
  • TWS Pairing: Two units of the same model can be wirelessly linked via True Wireless Stereo technology for either stereo separation or combined party-mode output.
  • Control Method: All functions are operated via touch-sensitive controls on the speaker body — there are no physical buttons.
  • Dimensions: The speaker measures 8.27″ wide, 3.07″ tall, and 2.83″ deep in its rectangular form factor.
  • Weight: The unit weighs 650 grams (approximately 1.43 lbs), keeping it practical for transport in a day bag or backpack.
  • Connectivity: Connects to any Bluetooth-enabled device including smartphones, tablets, and laptops; no aux input is included.
  • Microphone: A built-in microphone supports hands-free calling, though performance is limited in high-noise or windy outdoor environments.
  • In the Box: Each unit includes the speaker, a USB-C charging cable, a user manual, and an 18-month warranty card.
  • Warranty: Covered by an 18-month limited manufacturer warranty from EarFun.
  • Power Source: Powered by a built-in rechargeable lithium-ion battery — no external power source or replaceable batteries required.
  • Material: The exterior is constructed from composite materials with waterproof sealing applied throughout the enclosure and port covers.
  • Model Number: Official model designation is SP300, sold under the UBOOM L product line by EarFun.

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FAQ

Full submersion is genuinely supported — the IP67 rating covers immersion in up to 1 meter of water for up to 30 minutes. What makes it extra practical is that the speaker floats, so if it slips off a pool ledge or out of a kayak, it will bob to the surface rather than sinking.

The 16-hour figure is achievable but represents close to best-case conditions — lower volume in outdoor mode. In typical use at moderate to high volume, plan for somewhere between 10 and 14 hours. Keeping the volume below 70 percent is the single biggest factor in stretching the runtime closer to the advertised ceiling.

Indoor mode prioritizes a fuller, more bass-heavy sound profile suited to smaller enclosed spaces. Outdoor mode pushes the volume ceiling higher and tugs back on some bass in favor of projection and battery efficiency — which makes a real difference when you are competing with ambient noise outside. Switching is done through the touch controls on the speaker body; the user manual maps out the exact gesture sequence.

A single unit does produce stereo sound from its two drivers. Pairing two units via TWS takes things further — one speaker handles the left channel and the other handles the right, creating genuine physical stereo separation across a wider space. It is worth it if you often host gatherings, but a single unit is already a stereo experience on its own.

Video mode reduces the processing delay in the Bluetooth audio signal, which helps keep dialogue and sound effects in sync when you are streaming video on a phone or tablet. It will not eliminate latency entirely, but most users notice a clear improvement over standard Bluetooth mode. You enable it manually through the touch controls — it does not activate automatically when you open a video app.

With dry hands, the controls are responsive and most people get comfortable with the layout within a day or two. The honest limitation is that wet hands reduce touch sensitivity noticeably, which is a real inconvenience given how often this speaker ends up near water. If you expect to be adjusting volume or switching modes with wet hands frequently, be prepared for occasional missed inputs.

Long-term owners report that the build holds up well overall — no cracking, rattling, or structural issues after repeated outdoor trips. The main area of concern flagged by heavy users is the USB-C port cover, which can loosen slightly after extensive exposure to water, sand, or salt air. Rinsing it with fresh water after beach or saltwater use is a smart habit to extend the seal life.

Yes, the UBOOM L can play audio while connected to a USB-C charger. Keep in mind that opening the port cover to access the charging port does expose that area, so avoid doing this near water or in wet conditions.

The bass performance is genuinely better than most speakers this size, largely thanks to the dual passive radiators that add physical reinforcement rather than just EQ boosting. That said, in small indoor spaces the low-end emphasis can occasionally blur the midrange, and it is definitely not a replacement for a dedicated subwoofer setup. For outdoor listening and bass-forward genres like hip-hop or electronic music, it hits harder than most people expect at this size.

The built-in microphone and Bluetooth connection allow you to trigger your phone's native voice assistant during playback — tapping the appropriate control will pass the request through to whatever assistant your device uses. It is not a dedicated smart speaker with always-on listening, so you still initiate the assistant from the speaker rather than with a wake word.

Where to Buy

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myearfun.com
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