Short answer: the Ultimate Ears Megaboom 3. It ranks #108 of 175 medium speakers by sound quality (rated 3.0/5) at $191.99 and is still sold new; the Zealot S61 ranks #172 (rated 2.0/5) and is discontinued, so it is only an option used.
The Ultimate Ears Megaboom 3 is the better-sounding choice. IP67 rated, floats, and survives drops from up to 1 meter. It has an adjustable EQ, which the Zealot S61 lacks. Watch for: Not stereo, barely any bass.
The Zealot S61 is the longer-running, lighter option. 20W output, IPX7 waterproof, exceptional 40-hour battery life, Bluetooth 5.2, TWS stereo pairing, compact 1.5 lbs (665 g) design, single full-range driver, built-in microphone, AUX input, USB-C charging. It is rated for 40 hours of battery against 20 for the Ultimate Ears Megaboom 3. At 1.5 lbs (665 g) it weighs noticeably less than the Ultimate Ears Megaboom 3 at 2 lbs (925 g). It keeps a wired aux input, which the Ultimate Ears Megaboom 3 lacks. The tradeoff: Sounds like a soup can, no bass at all.
Buy the Ultimate Ears Megaboom 3. It is rated higher for sound quality and still sold new, while the Zealot S61 is discontinued.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Ultimate Ears Megaboom 3 | Zealot S61 | |
|---|---|---|
| Price | $191.99 | $20 Discontinued |
| Ranked | #108 of 175 in Medium Size Portable Bluetooth Speakers | #172 of 175 in Medium Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | 70Hz | - |
| Battery Life | 20 hours (Manufacturer specified) | 40 hours (Manufacturer specified) |
| Maximum SPL | 98dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (PartyUp up to 50 speakers) | - |
| Power Input | Micro USB | USB-C |
| Stereo | No | No (single full-range driver) |
| Omnidirectional | Yes | No |
| Weight | 2 lbs (925 g) | 1.5 lbs (665 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 4.2 | 5.2 |
| Drivers | 2x 50mm fullrange | 66mm full-range |
| Dimensions | 3.4” x 8.9” x 3.4” (87 x 225 x 87 mm) | 4.1” x 4.1” x 6.7” (103 x 103 x 170 mm) |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | - |
| IP Rating | IPX7 | IPX7 |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| App | Yes (UE | BOOM app) | No |
| Aux Input | No | Yes |
| EQ | Yes (App EQ) | No |
| TWS | Yes | Yes |
| Strap | Yes (built-in loop) | - |
| Built-in Microphone | - | Yes |
| Amplifier Power | - | 20W |
| Power Bank | - | No |
Related Speaker Comparisons
More worthwhile head-to-heads for 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 12, 2026 at 4:13 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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The Two Speakers In Full
Ultimate Ears Megaboom 3: $191.99 Amazon $191.99 eBay
Newer model: the Ultimate Ears Megaboom 4, ranked lower, rated 2.1/5, released Jun 2024. See every Ultimate Ears Wonderboom, Boom and Megaboom generation.
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 →
| Released | Sep 2018 (8 years ago) |
|---|---|
| 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
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- Ultimate Ears Megaboom 3 vs Ultimate Ears Wonderboom 2
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Zealot S61: $20 Discontinued eBay
Pros: 20W output, IPX7 waterproof, exceptional 40-hour battery life, Bluetooth 5.2, TWS stereo pairing, compact 665g design, single full-range driver, built-in microphone, AUX input, USB-C charging
Cons: Sounds like a soup can, no bass at all. Weird frequency response all over. Discontinued and no longer sold new.
Full Zealot S61 review and specifications →
| Released | Feb 2022 (4 years ago) |
|---|---|
| Amplifier Power | 20W |
| App | No |
| Aux Input | Yes |
| Battery Life | 40 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 5.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 4.1” x 4.1” x 6.7” (103 x 103 x 170 mm) |
| Drivers | 66mm full-range |
| EQ | No |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No (single full-range driver) |
| TWS | Yes |
| Weight | 1.5 lbs (665 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons