Short answer: the W-King D320 for features per dollar, the Megaboom 4 for build and battery. The D320 gives 40W output power, IP67 waterproofing, 24-hour battery life, a customizable EQ app with 6 preset modes, Bluetooth 5.3 and AUX and MicroSD support for $52.92. It is not stereo, though, and the Megaboom 4 answers with IP67, floats and USB-C charging for $200 while carrying a lot of distortion at higher volumes.
Buy the W-King D320. It is rated higher for sound quality than the Ultimate Ears Megaboom 4 and costs less, which makes it the one to get unless you need something the other one does better.
Want more options? Browse the full Portable Bluetooth rankings.
A tough waterproof speaker that floats, with USB-C charging, a long battery and PartyUp linking.
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 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.
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Specifications Side By Side
| Ultimate Ears Megaboom 4 | W-King D320 | |
|---|---|---|
| Price | $200 | $52.92 |
| Ranked | #173 of 179 in Medium Size Portable Bluetooth Speakers | #49 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Battery Life | 20 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| IP Rating | IP67 | IP67 |
| Party Mode | Yes (PartyUp up to 50 speakers) | - |
| Stereo | No | No |
| Omnidirectional | Yes | No |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.1 | 5.3 |
| Dimensions | 3.4” x 3.4” x 8.9” (87 x 87 x 225 mm) | 3.3” x 8.4” (83 x 214 mm) (diameter x height) |
| Drivers | 2x 50x50mm full-range + 2x 55x86mm passive radiators | 52mm x 91mm woofer, 2x 25mm tweeters + 2x passive radiators |
| TWS | Yes | No |
| EQ | Yes (via app) | Yes |
| Power Input | USB-C | USB-C |
| Built-in Microphone | No | Yes |
| Weight | 2.4 lbs (1.1 kg) | 3.1 lbs (1.4 kg) |
| Maximum SPL | 91dB (Manufacturer specified) | - |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| Aux Input | No | Yes |
| Strap | Yes (built-in loop) | - |
| MicroSD Playback | - | Yes |
| Frequency Response | - | 100Hz - 18kHz (Manufacturer specified) |
| Amplifier Power | - | 40W |
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