Short answer: the Ultimate Ears Boom 4 if sound quality matters most, the Walla Sound if price matters most. The Ultimate Ears Boom 4 ranks #91 of 142 medium speakers at $109.99. The Walla Sound ranks #129 at $49.99, $60 cheaper.
What the Ultimate Ears Boom 4 offers: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. 15 hour battery. Customizable EQ and speaker-pairing via the UE app. Watch for: Not much improvement over the old ones. Weak bass extension and thuddy bass. Gets distorted above 90%
What the Walla Sound offers: IPX5 water resistant, 8-hour battery life, shockproof construction, Bluetooth 5.0, MicroSD card support, AUX input, built-in HD microphone, voice assistant compatible, lightweight 300g Watch for: No bass, gets distorted when turned up. Harsh upper mids.
Buy the Ultimate Ears Boom 4 if sound quality is the priority over the price, or the Walla Sound if the price is the priority over sound quality.
Skip the Walla Sound if sound quality matters to you. It ranks near the bottom of the 142 medium speakers.
Battery life favors the Ultimate Ears Boom 4: rated for 15 hours against 8 hours for the Walla Sound.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Ultimate Ears Boom 4 | Walla Sound | |
|---|---|---|
| Price | $109.99 | $49.99 |
| Ranked | #91 of 142 in Medium Size Portable Bluetooth Speakers | #129 of 142 in Medium Size Portable Bluetooth Speakers |
| App | Yes | - |
| Battery Life | 15 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| IP Rating | IP67 | IPX5 |
| Power Input | USB-C | Micro USB |
| Stereo | Yes | - |
| Omnidirectional | No | No |
| Weight | 1.4 lbs (620 g) | 0.7 lbs (300 g) |
| 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) | - |
| 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) |
| Bass Extension (-10dB) | - | ~90Hz |
| MicroSD Playback | - | Yes |
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Prices on this page were last checked September 16, 2026 at 12:41 AM 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
Ultimate Ears Boom 4: $109.99 Amazon eBay
Pros: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. 15 hour battery. Customizable EQ and speaker-pairing via the UE app.
Cons: Not much improvement over the old ones. Weak bass extension and thuddy bass. Gets distorted above 90%
Full Ultimate Ears Boom 4 review and specifications →
| App | Yes |
|---|---|
| Aux Input | No |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.1 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 7.2" x 2.9" x 2.9" (184 x 73 x 73 mm) |
| Drivers | 2x 1.57" (40mm) active drivers + 2x 1.81" x 2.57" (46.1 x 65.2mm) passive radiators |
| EQ | Yes (via app) |
| IP Rating | IP67 |
| Maximum SPL | 85dBC (Manufacturer specified) |
| Omnidirectional | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 1.4 lbs (620 g) |
- Links
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Walla Sound: $49.99 Walla Sound eBay
Pros: IPX5 water resistant, 8-hour battery life, shockproof construction, Bluetooth 5.0, MicroSD card support, AUX input, built-in HD microphone, voice assistant compatible, lightweight 300g. Measured bass extension of ~90Hz (-10dB).
Cons: No bass, gets distorted when turned up. Harsh upper mids.
Full Walla Sound review and specifications →
| Aux Input | Yes |
|---|---|
| Bass Extension (-10dB) | ~90Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 2.7" x 2.7" x 6.3" (68 x 68 x 160 mm) |
| Drivers | 30mm metal diaphragm driver |
| IP Rating | IPX5 |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Power Input | Micro USB |
| TWS | Yes |
| Weight | 0.7 lbs (300 g) |
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