
Ultimate Ears Boom 4 Blue
Score: 80/100
Marshall Emberton III
Score: 87/100Rankings

The Marshall Emberton III combines 360° True Stereophonic sound, IP67 durability and over 32 hours of battery life in a compact, vintage-styled design. Its limited EQ presets and lack of deep sub-bass keep it from matching larger powerhouses. Suited for users who value balanced sound, ruggedness and long endurance in a stylish package.

The BOOM 4 offers 360° sound, IPX7 protection and a lightweight design with 15 hours of playtime, plus wireless charging. Its modest volume, micro-USB charging, and limited bass keep it from dominating larger party scenarios. Ideal for travelers and outdoor enthusiasts who need a portable, durable speaker.
| Attribute | ![]() | ![]() |
|---|---|---|
15 hours | 32 hoursbest | |
| ↓ lower better | 797.5 g | 673 gbest |
— | 38 Wbest | |
45 mbest | — | |
1 yearsbest | 1 yearsbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Battery & Power(1) | ||
Battery Life (hours) | 15 hours | 32 hours |
Build & Design(3) | ||
Weight (g) | 797.5 g | 673 g |
Dimensions (W×H×D) (mm) | 101.6 x 203.2 x 101.6 mm mm | 80x190x110 mm |
IP Rating | IPX7 | IP67 |

Products in the top-left offer the best value (high score, low price).

Professional reviewers commend the BOOM 3 for its balanced 360-degree sound, rugged IP67 build, and impressive 13.7-hour battery life, awarding it a high portability score. However, they criticize its modest maximum volume of 86.9 dB SPL, limited bass impact, and the cumbersome micro-USB charging port, noting that it falls short for users needing high-output audio.
Everyday users love the BOOM 3's durability, waterproof reliability, and truly portable design with a handy hook, as well as the long battery life and immersive 360-degree sound in small outdoor settings. Common frustrations revolve around the speaker's limited loudness and the difficulty of plugging in the micro-USB charger.

“360-degree cylindrical design delivers balanced sound from all listening angles, creating an immersive audio experience.”

“Maximum output limited to 86.9 dB SPL, which may be insufficient for large outdoor gatherings or parties.”

“competes head-to-head with the best.”



Professional reviewers consider the Emberton III a top-small Bluetooth speaker, lauding its 32+ hour battery, authentic Marshall tone, and phenomenal 360° audio while noting the limited EQ presets and lack of smart features as the main drawbacks. They view it as a stylish, rugged option that outperforms many rivals in sound balance and endurance, though not a mandatory upgrade for owners of the previous Emberton.
Everyday users overwhelmingly praise the Emberton III for its rich, clear sound, impressive bass for its size, premium build quality, and marathon-long battery life, often saying it competes head-to-head with higher-priced options. The most common complaints revolve around the restricted EQ presets and a bass response that isn't as deep as larger speakers.