Short answer: the EarFun Uboom L. It ranks #2 of 177 medium speakers by sound quality, rated 4.6/5, at $49.79; the W-King D320 ranks #49, rated 3.6/5, and costs $52.92, which makes this an easy call rather than a real tradeoff.
The EarFun Uboom L is the better-sounding, lighter option. A great value medium speaker with clear, natural sound, waterproofing, and a Video Mode that keeps audio in sync with video. At 1.4 lbs (650 g) it weighs much less than the W-King D320 at 3.1 lbs (1.4 kg). It plays in stereo from a single unit, unlike the W-King D320. Watch for: It cannot produce real low-bass rumble or fill a large, noisy space, and the top end loses some detail.
The W-King D320 is the longer-running option. An affordable waterproof travel speaker with loud, punchy bass, long battery life, an aux input, microSD playback and app EQ. It is rated for 24 hours of battery against 16 for the EarFun Uboom L. The catch: A single D320 is not stereo, and its warm balance trades away some detail and upper-treble air.
Buy the EarFun Uboom L. It is rated higher for sound quality than the W-King D320 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Want more options? Browse the full Portable Bluetooth rankings.
A great value medium speaker with clear, natural sound, waterproofing, and a Video Mode that keeps audio in sync with video.
An affordable waterproof travel speaker with loud, punchy bass, long battery life, an aux input, microSD playback and app EQ.
Prices on this page were last checked October 31, 2026 at 7:11 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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Specifications Side By Side
| EarFun Uboom L | W-King D320 | |
|---|---|---|
| Price | $49.79 after coupon UBOOMLWC | $52.92 |
| Ranked | #2 of 177 in Medium Size Portable Bluetooth Speakers | #49 of 177 in Medium Size Portable Bluetooth Speakers |
| App | Yes (firmware >= 1.2.6) | Yes |
| Aux Input | Yes | Yes |
| Aux Latency | 216ms | - |
| Bass Extension (-10dB) | 56Hz | - |
| Battery Life | 16 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | AAC, SBC | SBC (inferred; additional codecs unverified) |
| Built-in Microphone | Yes | Yes |
| EQ | Yes (10 band, firmware >= 1.2.6) | Yes |
| IP Rating | IP67 | IP67 |
| Bluetooth Latency | 400ms normal / 66ms low latency mode | - |
| Maximum SPL | 103dB (measured by Alan Ross Reviews) | - |
| Party Mode | No | - |
| Power Bank | No | - |
| Power Input | USB-C | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| TWS | Yes | No |
| Weight | 1.4 lbs (650 g) | 3.1 lbs (1.4 kg) |
| Bluetooth Version | 5.0 | 5.3 |
| Dimensions | 3.1” x 8.3” x 2.8” (78 x 210 x 72 mm) | 3.3” x 8.4” (83 x 214 mm) (diameter x height) |
| Drivers | 2x 55mm drivers + 2x passive radiators | 52mm x 91mm woofer, 2x 25mm tweeters + 2x passive radiators |
| Amplifier Power | 28W | 40W |
| Digital Aux Input | No | No |
| MicroSD Playback | - | Yes |
| Frequency Response | - | 100Hz - 18kHz (Manufacturer specified) |
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