Short answer: the Marshall Emberton III for battery life, the Megaboom 3 for durability. The Emberton III runs 30 hours and gains 4 hours from a 20 minute quick-charge, though its echo-like coloration and shallow bass hold it back. The Megaboom 3 is IP67 rated, floats and survives drops from up to 1 meter, but it is not stereo and has barely any bass.
Buy the Ultimate Ears Megaboom 3. It is rated higher for sound quality than the Marshall Emberton III and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
There is a real battery-life gap here: the Marshall Emberton III is rated for 32 hours, the Ultimate Ears Megaboom 3 only 20 hours.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Marshall Emberton III | Ultimate Ears Megaboom 3 | |
|---|---|---|
| Price | $129.99 | $111.63 |
| Ranked | #122 of 164 in Medium Size Portable Bluetooth Speakers | #105 of 164 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes (UE | BOOM app) |
| Bass Extension (-10dB) | 62Hz | 70Hz |
| Battery Life | 32 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| Party Mode | Yes (Marshall Stack) | Yes (PartyUp up to 50 speakers) |
| Weight | 1.5 lbs (673 g) | 2 lbs (925 g) |
| IP Rating | IP67 | IPX7 |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 4.2 |
| Dimensions | 6.3” x 2.7” x 3” (160 x 68 x 76 mm) | 3.4” x 8.9” x 3.4” (87 x 225 x 87 mm) |
| Drivers | 2x 2” full-range cone drivers + 2x 2” passive radiators | 2x 50mm fullrange |
| TWS | No | Yes |
| EQ | Yes (3 presets via app) | Yes (App EQ) |
| Built-in Microphone | Yes | - |
| Stereo | Yes | No |
| Omnidirectional | Yes | Yes |
| Power Input | USB-C | Micro USB |
| Power Bank | No | - |
| Aux Input | No | No |
| Amplifier Power | 20W | - |
| Bluetooth Codecs | SBC | SBC |
| Digital Aux Input | No | No |
| Strap | No | Yes (built-in loop) |
| Maximum SPL | - | 98dB (measured by Alan Ross Reviews) |
| Frequency Response | - | 60Hz - 20kHz (Manufacturer specified) |
Related Speaker Comparisons
More top alternatives to Ultimate Ears Megaboom 3:
- Earfun Uboom L vs Ultimate Ears Megaboom 3
- Soundcore Motion 300 vs Ultimate Ears Megaboom 3
- Soundcore Motion+ vs Ultimate Ears Megaboom 3
- Soundcore Boost “upgraded” 2021 vs Ultimate Ears Megaboom 3
- Minirig 4 vs Ultimate Ears Megaboom 3
Prices on this page were last checked October 4, 2026 at 9:58 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.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Speakers In Full
Marshall Emberton III: $129.99 Amazon eBay
Older model: the Marshall Emberton II (ranked lower, rated 2.7/5).
Smaller model: the Marshall Willen II (rated 4/5).
Larger model: the Marshall Middleton (rated 4/5).
Pros: 30 hour battery life: among the best in its class; a 20 min quick-charge gives 4 hours. IP67 rated, durable rubbery build using 50% recycled plastic. Measured bass extension of 62Hz (-10dB).
Cons: Strange unnatural echo-like sound coloration, bass not as deep as competitors. Not technically a 360 speaker, only front and rear. Not very loud. Not really any different from the Emberton II except having the treble turned down a little bit.
Full Marshall Emberton III review and specifications →
| Amplifier Power | 20W |
|---|---|
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | 62Hz |
| Battery Life | 32 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 6.3” x 2.7” x 3” (160 x 68 x 76 mm) |
| Drivers | 2x 2” full-range cone drivers + 2x 2” passive radiators |
| EQ | Yes (3 presets via app) |
| IP Rating | IP67 |
| Omnidirectional | Yes |
| Party Mode | Yes (Marshall Stack) |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | No |
| TWS | No |
| Weight | 1.5 lbs (673 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Marshall Emberton III vs Bose SoundLink Color II
- Marshall Emberton III vs Marshall Emberton II
- Marshall Emberton III vs Yamaha True X Speaker 1A
- Marshall Emberton III vs Teufel Rockster Go
- Marshall Emberton III vs Sony SRS-XB20
- Marshall Emberton III vs Sony SRS-XB30
- Marshall Emberton III vs Tribit Stormbox
- Marshall Emberton III vs Soundcore Flare 2
- See all 140 comparisons
Ultimate Ears Megaboom 3: $111.63 Amazon eBay
Newer model: the Ultimate Ears Megaboom 4, ranked lower, rated 2.1/5.
Pros: IP67 rated, floats, and survives drops from up to 1 meter. 20 hour battery life: about double most speakers this size. Measured bass extension of 70Hz (-10dB).
Cons: Not stereo, barely any bass. You can tell from the micro USB that they are just feeding you the same crap hardware over and over, this is inexcusable for a product released in 2018. Not technically a 360 speaker, only front and rear.
Full Ultimate Ears Megaboom 3 review and specifications →
| App | Yes (UE | BOOM app) |
|---|---|
| Aux Input | No |
| Bass Extension (-10dB) | 70Hz |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 4.2 |
| Digital Aux Input | No |
| Dimensions | 3.4” x 8.9” x 3.4” (87 x 225 x 87 mm) |
| Drivers | 2x 50mm fullrange |
| EQ | Yes (App EQ) |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Maximum SPL | 98dB (measured by Alan Ross Reviews) |
| Omnidirectional | Yes |
| Party Mode | Yes (PartyUp up to 50 speakers) |
| Power Input | Micro USB |
| Stereo | No |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 2 lbs (925 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Ultimate Ears Megaboom 3 vs LG Xboom Grab
- Ultimate Ears Megaboom 3 vs Ultimate Ears Wonderboom 4
- Ultimate Ears Megaboom 3 vs Ultimate Ears Wonderboom 3
- Ultimate Ears Megaboom 3 vs Soundcore 2
- Ultimate Ears Megaboom 3 vs Ultimate Ears Wonderboom 2
- Ultimate Ears Megaboom 3 vs Tribit Stormbox 2
- Ultimate Ears Megaboom 3 vs Ultimate Ears Wonderboom
- Ultimate Ears Megaboom 3 vs Tribit Xsound Surf
- See all 89 comparisons