Short answer: the Ultimate Ears Megaboom 3 if sound quality matters most, the Zealot S61 if price matters most. The Ultimate Ears Megaboom 3 ranks #83 of 136 medium speakers at $163. The Zealot S61 ranks #134 at $20, $143 cheaper.
What the Ultimate Ears Megaboom 3 offers: IP67 rated, floats, and survives drops from up to 1 meter. 20 hour battery life - about double most speakers this size. Watch for: 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.
What the Zealot S61 offers: 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 Watch for: Sounds like a soup can, no bass at all. Weird frequency response all over.
Buy the Ultimate Ears Megaboom 3 if sound quality is the priority over the price, or the Zealot S61 if the price is the priority over sound quality.
If sound quality matters at all to you, skip the Zealot S61. It ranks near the bottom of the 136 medium speakers, so look higher up the list instead.
If battery life is a priority, the Zealot S61 is rated for 40 hours versus 20 hours for the Ultimate Ears Megaboom 3.
Specifications Side By Side
| Ultimate Ears Megaboom 3 | Zealot S61 | |
|---|---|---|
| Price | $163 | $20 |
| Ranked | #83 of 136 in Medium Size Portable Bluetooth Speakers | #134 of 136 in Medium Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | 70Hz | - |
| Battery Life | 20 hours (Manufacturer specified) | 40 hours (Manufacturer specified) |
| Max Volume | 98dB | - |
| Party Mode | Yes (PartyUp up to 50 speakers) | - |
| Power Input | Micro USB | USB-C |
| Stereo | No | - |
| Omnidirectional | Yes | No |
| Weight | 2 lbs / 925 g | 1.5 lbs / 665 g |
| 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 |
| TWS | - | Yes |
| Built in Microphone | - | Yes |
| Aux Input | - | Yes |
| Output Power | - | 20W |
| Power Bank | - | No |
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- JBL Charge 4 vs Ultimate Ears Wonderboom 4
- Marshall Emberton III vs Zealot S61
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Prices on this page were last checked August 27, 2026 at 10:09 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: $163 Amazon eBay
Pros: IP67 rated, floats, and survives drops from up to 1 meter. 20 hour battery life - about double most speakers this size.
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 →
| Bass Extension (-10dB) | 70Hz |
|---|---|
| Battery Life | 20 hours (Manufacturer specified) |
| 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 |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Max Volume | 98dB |
| Omnidirectional | Yes |
| Party Mode | Yes (PartyUp up to 50 speakers) |
| Power Input | Micro USB |
| Stereo | No |
| Weight | 2 lbs / 925 g |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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- 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
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Zealot S61: $20 Amazon Aliexpress 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.
Full Zealot S61 review and specifications →
| Aux Input | Yes |
|---|---|
| Battery Life | 40 hours (Manufacturer specified) |
| 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 |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Output Power | 20W |
| Power Bank | No |
| Power Input | USB-C |
| TWS | Yes |
| Weight | 1.5 lbs / 665 g |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons