These sit in different size classes, so this is not a straight ranking comparison. The EarFun Uboom X ranks #1 of 91 boombox speakers by sound quality at $159.99; the Joy&Oluv’Sone sEARius S1 ranks #1 of 166 medium speakers by sound quality.
The EarFun Uboom X is the deeper-bass choice. Tuned by Oluv and he knocked it out of the park again. Its bass reaches about 38Hz before falling 10dB, against 49Hz for the Joy&Oluv’Sone sEARius S1. It plays in stereo from a single unit, unlike the Joy&Oluv’Sone sEARius S1. The tradeoff: The out of the box 0.33 firmware and EQ sounds horrible.
What the Joy&Oluv’Sone sEARius S1 does well: A compact portable speaker developed with a focus on tonal balance, natural midrange timbre, and smooth frequency response rather than exaggerated commercial bass boost. The catch: A limited-production model available primarily through direct pre-orders rather than retail distribution.
One note: the EarFun Uboom X is discontinued, but it still ranks #1 of 91 boombox speakers by sound quality, ahead of most of what is still sold new, so it is worth considering used.
Buy the EarFun Uboom X for a boombox speaker, or the Joy&Oluv’Sone sEARius S1 for a medium speaker instead.
About the ratings: the Joy&Oluv’Sone sEARius S1’s rating is estimated from measured siblings and predecessors rather than its own measurements, with a likely range of 4.5 to 4.9, so this verdict could change once it is measured.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| EarFun Uboom X | Joy&Oluv’Sone sEARius S1 | |
|---|---|---|
| Price | $159.99 Discontinued | €129 (€199 for 2), Preorder |
| Ranked | #1 of 91 in Boombox Size Portable Bluetooth Speakers | #1 of 166 in Medium Size Portable Bluetooth Speakers Estimated |
| App | Yes (Earfun Audio app) | No |
| Aux Input | Yes | - |
| Aux Latency | 16ms | - |
| Bass Extension (-10dB) | ~38Hz | 49Hz (measured, Oluv frequency response chart) |
| Battery Life | 30 hours (Manufacturer specified) | - |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | AAC, SBC | - |
| Built-in Microphone | Yes | - |
| EQ | Yes (App EQ) | - |
| IP Rating | IP67 | - |
| Bluetooth Latency | SBC Video mode 48ms, AAC Video mode 128ms, SBC 112ms, AAC 176ms | - |
| Maximum SPL | 110dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (Party Connect mode, up to 50 speakers) | - |
| Power Bank | Yes (USB-C) | - |
| Power Input | USB-C | USB-C |
| TWS | Yes | Yes |
| Weight | 9 lbs (4.1 kg) | - |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| USB Playback | No | - |
| FM Tuner | No | - |
| Bluetooth Version | 5.3 | - |
| Amplifier Power | 80W | - |
| Dimensions | 15.7” x 5.9” x 8.5” (400 x 150 x 215 mm) | - |
| Drivers | 2x 102mm (4”) woofers + 2x 20mm tweeters | - |
| Digital Aux Input | No | - |
| Lights | Yes | - |
| Strap | - | Yes |
Watch Them Compared
Videos and reviews that test both speakers side by side.
Related Speaker Comparisons
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- EarFun Uboom X vs Tronsmart Fiitune X30
- EarFun Uboom X vs Soundcore Boom 2 Plus
Prices on this page were last checked October 10, 2026 at 5:37 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Speakers In Full
EarFun Uboom X: $159.99 Discontinued eBay
Pros: Tuned by Oluv and he knocked it out of the park again. Deeper bass than the Tribit Stormbox Blast. Extremely neutral, possibly the best of any modern Bluetooth speaker slightly behind the Vifa Helsinki. This is the only speaker that sounds correct at every single volume level due to Oluv’s individual EQ settings at each volume level. Other speakers will need a different EQ at each volume level. Amazing sounding at low levels as it boosts bass and treble at low levels to account for the equal-loudness contour. Just considering the midrange and treble, this speaker is better sounding than the EarFun Uboom L. Measured bass extension of ~38Hz (-10dB).
Cons: The out of the box 0.33 firmware and EQ sounds horrible. Some users have reported sound interruption issues when running two in TWS, though not on every source device, and disabling AAC resolves it where it occurs. Discontinued.
Setup: Please update it using the Earfun app (Android or iOS) and select an Oluv EQ. The Earfun app has sound profiles created by Oluv for Studio, Indoor, Indoor+, Outdoor, Outdoor+, BOOM xxX, and Ground 0 which are all fantastic. Oluv has a newer firmware pack that brings it up a few more notches of neutral
Full EarFun Uboom X review and specifications →
| Released | Mar 2024 (2 years ago) |
|---|---|
| Amplifier Power | 80W |
| App | Yes (Earfun Audio app) |
| Aux Input | Yes |
| Aux Latency | 16ms |
| Bass Extension (-10dB) | ~38Hz |
| Battery Life | 30 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | AAC, SBC |
| Bluetooth Latency | SBC Video mode 48ms, AAC Video mode 128ms, SBC 112ms, AAC 176ms |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 15.7” x 5.9” x 8.5” (400 x 150 x 215 mm) |
| Drivers | 2x 102mm (4”) woofers + 2x 20mm tweeters |
| EQ | Yes (App EQ) |
| FM Tuner | No |
| IP Rating | IP67 |
| Lights | Yes |
| Maximum SPL | 110dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (Party Connect mode, up to 50 speakers) |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | No |
| Weight | 9 lbs (4.1 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- JOY‘s 3D Audio Show: B&W Zeppelin - audiophile sound quality test 🎧 More from Oluv’Sone →
- Oluv Patreon: B&W Zeppelin vs Earfun UBoom X (indoor+)
- Oluv Patreon: An evening with the “best portable speakers”?
- Joy & Oluv’Sone: Tribit Stormbox Blast vs Earfun UBoom X, a PROPER sound test 😎
- Joy & Oluv’Sone: 🎃🔥 UBoom X - Halloween Rock Special 🎸🤘
- JOY‘s 🎧3D🔈Audio-Show: JBL Charge 6, Xtreme 4 & Earfun UBoom X - taking sound to the top
- M1M Tech Channel: Partybox Killer? 2x Earfun UBoom X stärker als JBL Encore 2 ? More from M1MTechChannel →
- Mateusz Cholewa: EarFun UBOOM X Deep Bass 🆚 Tribit Stormbox Blast🎶Review👌 More from Mateusz Cholewa →
- Mateusz Cholewa: TRIBIT StormBox LAVA vs EarFun UBOOM X
- Joy & Oluv’Sone: $600 premium Bluetooth speaker vs $115 cheapo UBoom X
- Joy & Oluv’Sone: Tribit Stormbox Blast 2 - outdoor sound test
- Joy & Oluv’Sone: Tribit Stormbox Blast 2 - indoor sound test
- Joy & Oluv’Sone: Tribit Stormbox Blast 2 vs 2 Earfun UBoom X - outdoor test
- Joy & Oluv’Sone: JBL Partybox Encore vs Earfun UBoom X: outdoors
- Joy & Oluv’Sone: JBL Partybox Encore vs Earfun UBoom X: indoors
- Joy & Oluv’Sone: Soundcore Motion Boom Plus & Earfun UBoom X - sound test
- Joy & Oluv’Sone: Best portable speakers 2025 - get the best bang for your buck $$$
- Oluv Patreon: JBL Partybox 720 - first impressions
- Oluv Patreon: Harman Kardon go+play 3 vs Earfun UBoom X
- Oluv Patreon: Earfun UBoom X vs JBL Boombox 3 - outdoor test
- Oluv Patreon: Earfun UBoom X im Vergleich zum Teufel nochmal
- Oluv Patreon: Earfun UBoom X vs JBL Boombox 3 - outdoor
- Oluv Patreon: UBoom X - desktop mode demonstration
- Oluv Patreon: Earfun UBoom X - different firmware versions
- Oluv Patreon: UBoom X - final outdoor test
- Oluv Patreon: Tribit Stormbox Blast vs Earfun UBoom X - outdoor test
- Oluv Patreon: Earfun UBoom X - listening session
- Oluv Patreon: Earfun UBoom X vs JBL Partybox 100
- Oluv Patreon: Earfun UBoom X - final sound check
- Oluv Patreon: Earfun UBoom X - teaser 3
- Oluv Patreon: Earfun UBoom X - teaser 2
- Oluv Patreon: Earfun UBoom X - teaser 1
- Oluv Patreon: Marshall Middleton II - first impressions
- Oluv Patreon: JBL Authentics 300 - listening session
- Oluv Patreon: Zealot S89 vs Yeahbox Boom Max3 - indoor listening test
- Alan Ross Reviews: Earfun Uboom X Mini Boombox bluetooth speaker, a PROPER review 😝 More from alanrossreviews →
- JOY‘s 🎧3D🔈Audio-Show: JBL Boombox 4 vs Earfun UBoom X - sound test
- Josh’s Gadgets and More: Earfun Uboom X vs ZZA K8 sound comparison
- Joy & Oluv’Sone: J&O sEARius vs Earfun UBoom X and a bit of Bose
- Mateusz Cholewa: Marshall Kilburn 3 vs EarFun UBOOM X
- Dominik Reviews: Tronsmart Fiitune X30 vs Earfun UBOOM X - BOOMY SOUND! - Sound Test More from Dominik Reviews →
- Dominik Reviews: Bugani Brief Pro vs Earfun UBOOM X - Very similar? - Sound Test
- Joy & Oluv’Sone: Earfun UBoom X vs Teufel Rockster Air 2 - basstest
- Dominik Reviews: Teufel BOOMSTER 4 vs Earfun UBOOM X - BASS!! - Sound Test
- Dominik Reviews: Tronsmart Bang 2 vs Earfun UBOOM X - Similar Size, not so similar performance?
- Head-to-Head Comparisons
- EarFun Uboom X vs Tribit Stormbox Blast
- EarFun Uboom X vs Harman Kardon Go + Play 3
- EarFun Uboom X vs JBL Partybox Encore 2
- EarFun Uboom X vs JBL Partybox Encore Essential 2
- EarFun Uboom X vs JBL Partybox Encore
- EarFun Uboom X vs Harman Kardon Onyx Studio 9
- EarFun Uboom X vs Zealot ZE51
- EarFun Uboom X vs Zealot ZE41
- See all 36 comparisons
Joy&Oluv’Sone sEARius S1: €129 (€199 for 2) Preorder Estimated Patreon
Pros: A compact portable speaker developed with a focus on tonal balance, natural midrange timbre, and smooth frequency response rather than exaggerated commercial bass boost. Custom DSP tuning and dual passive radiators deliver bass extension down to 49Hz (-10dB rolloff, measured from Oluv’s published frequency response chart) despite the small enclosure volume. Supports both horizontal and upright placement, with True Wireless Stereo (TWS) pairing to run two units as a dedicated stereo pair. Durable fabric wrap with integrated carry lanyard. Measured bass extension of 49Hz (-10dB).
Cons: A limited-production model available primarily through direct pre-orders rather than retail distribution. The compact driver size limits maximum clean output and dynamic headroom compared to larger boombox-class speakers, with bass output tapering off at high volumes. Mono output from a single speaker requires pairing a second unit for stereo separation. No independent acoustic measurements have been published.
Full Joy&Oluv’Sone sEARius S1 review and specifications →
| App | No |
|---|---|
| Bass Extension (-10dB) | 49Hz (measured, Oluv frequency response chart) |
| Bluetooth | Yes |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes |
| TWS | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Joy & Oluv’Sone: Joy&Oluv’Sone sEARius S1 - preorder More from Oluv’Sone →
- Joy & Oluv’Sone: Introducing Joy&Oluv’Sone sEARius S1 - audiophile portable bluetooth speaker
- Joy & Oluv’Sone: JBL, Bose, B&O, Sonos, Earfun, SoundCore… which portable speaker sounds best?
- Joy & Oluv’Sone: J&O sEARius vs Earfun UBoom X and a bit of Bose
- Joy & Oluv’Sone: Bluetooth speaker vs Studio Monitors
- Oluv Patreon: 50:50 (frequency response chart)
- Oluv Patreon: sEARius vs Minirig 4
- Oluv Patreon: sEARius vs Helsinki
- Oluv Patreon: sEARius - outdoor mode
- Oluv Patreon: DALI KATCH G2 - sound demo
- Oluv Patreon: Further sEARius tweaks and improvements
- Oluv Patreon: Let‘s get sEARius
- Oluv Patreon: sEARius vs UBoom X
- Oluv Patreon: New sEARius samples have some serious problems
- Oluv Patreon: 2 sEARius in TWS stereo mode
- Oluv Patreon: Final soundcheck
- Oluv Patreon: Final sEARius touches
- Oluv Patreon: KEF Muo - sound demo
- Oluv Patreon: Joy&Oluv’Sone searius - in the living room
- Oluv Patreon: Joy&Oluv’Sone searius speaker - outdoor test
- Head-to-Head Comparisons