Short answer: the Xiaomi Sound Party. It ranks #20 of 179 medium speakers by sound quality (rated 4.1/5) at $135.84 and is still sold new; the EarFun Uboom Slim ranks #43 (rated 3.7/5) and is discontinued, so it is only an option used.
The Xiaomi Sound Party is the better-sounding, deeper-bass pick. A versatile outdoor speaker with warm, balanced sound, fully waterproof build, long battery life, a phone charging port and a handy retractable handle. Its bass reaches about 54Hz before falling 10dB, against 63Hz for the EarFun Uboom Slim. It is rated for 26 hours of battery against 16 for the EarFun Uboom Slim. It has an adjustable EQ, which the EarFun Uboom Slim lacks. Watch for: The sound evidence is mixed rather than universally glowing.
The EarFun Uboom Slim is the lighter choice. A slim, affordable waterproof stereo speaker with long battery life that doubles as a speakerphone. At 1.2 lbs (560 g) it weighs much less than the Xiaomi Sound Party at 2.6 lbs (1.2 kg). It keeps a wired aux input, which the Xiaomi Sound Party lacks. It plays in stereo from a single unit, unlike the Xiaomi Sound Party. The catch: Not as deep bass as others.
Buy the Xiaomi Sound Party. It is rated higher for sound quality; the EarFun Uboom Slim is no longer sold new.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Prices on this page were last checked November 7, 2026 at 7:34 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Xiaomi Sound Party | EarFun Uboom Slim | |
|---|---|---|
| Price | $135.84 | $79 Discontinued |
| Ranked | #20 of 179 in Medium Size Portable Bluetooth Speakers | #43 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | No | Yes |
| Bass Extension (-10dB) | 54Hz | ~63Hz |
| Battery Life | 26 hours (Manufacturer specified) | 16 hours (Manufacturer specified) |
| Built-in Microphone | Yes | Yes |
| EQ | Yes | No |
| IP Rating | IP67 | IPX7 |
| Party Mode | Yes (Party Connect, up to 100 speakers) | - |
| Power Bank | Yes (USB-C, 5V/3A) | - |
| Stereo | No | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Digital Aux Input | No | No |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Bluetooth Version | 5.4 | 5.2 |
| Dimensions | 10” x 3.6” x 3.6” (255 x 92 x 92 mm) | 2.6”H x 7.1”W x 2.6”D (65 x 180 x 65 mm) |
| Drivers | 2x 40mm woofers (35W total) + 2x 15mm tweeters | 45mm speaker drivers |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | - |
| Maximum SPL | 102dB (measured by Alan Ross Reviews) | - |
| Weight | 2.6 lbs (1200 g) | 1.2 lbs (560 g) |
| Amplifier Power | 50W | 20W |
| Power Input | USB-C (5V/3A, 9V/2A, 12V/2A) | USB-C |
| Lights | Yes | - |
| Strap | Yes (detachable strap) | - |
Related Speaker Comparisons
More worthwhile head-to-heads for Xiaomi Sound Party: