Short answer: the Ultimate Ears Boom 4, though neither ranks well in its class. It ranks #112 of 177 medium speakers by sound quality, rated 2.9/5, at $114.99. The Walla Sound ranks #163, rated 2.2/5, at $49.99, $65 cheaper, which does not close the gap in sound quality. Both are rated below 3.0/5 among the 177 medium speakers, and the EarFun Uboom L, ranked #2 at $49.79, is a better place to start if sound quality matters.
The Ultimate Ears Boom 4 is the better-sounding, longer-running pick. A tough waterproof speaker that floats, with USB-C charging, app EQ and pairing with other UE speakers. It is rated for 15 hours of battery against 8 for the Walla Sound. It is rated IP67 against IPX5 for the Walla Sound. It has an adjustable EQ, which the Walla Sound lacks. The catch: Not much improvement over the old ones.
The Walla Sound is the lighter choice. A small shockproof speaker with an aux input, microSD playback and a built in microphone. At 0.7 lbs (300 g) it weighs much less than the Ultimate Ears Boom 4 at 1.4 lbs (620 g). It keeps a wired aux input, which the Ultimate Ears Boom 4 lacks. Watch for: No bass, gets distorted when turned up.
Buy the Ultimate Ears Boom 4. It is rated higher for sound quality, and saving $65 with the Walla Sound does not make up for the sound-quality gap.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
A tough waterproof speaker that floats, with USB-C charging, app EQ and pairing with other UE speakers.
A small shockproof speaker with an aux input, microSD playback and a built in microphone.
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
| Ultimate Ears Boom 4 | Walla Sound | |
|---|---|---|
| Price | $114.99 | $49.99 |
| Ranked | #112 of 177 in Medium Size Portable Bluetooth Speakers | #163 of 177 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Battery Life | 15 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| IP Rating | IP67 | IPX5 |
| Power Input | USB-C | Micro USB |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| Weight | 1.4 lbs (620 g) | 0.7 lbs (300 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.1 | 5.0 |
| Dimensions | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) | 2.7” x 2.7” x 6.3” (68 x 68 x 160 mm) |
| Drivers | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators | 30mm metal diaphragm driver |
| TWS | Yes | Yes |
| EQ | Yes (via app) | No |
| Built-in Microphone | No | Yes |
| Power Bank | No | - |
| Aux Input | No | Yes |
| Maximum SPL | 85dBC (Manufacturer specified) | - |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| Strap | Yes (built-in loop) | - |
| Amplifier Power | - | 10W (2 x 5W) |
| Bass Extension (-10dB) | - | ~90Hz |
| MicroSD Playback | - | Yes |
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