These are not really the same size class, and that is the honest framing here. The Soundcore Boom 3i ranks #31 of 179 medium speakers by sound quality at $118.99; the Zealot S67 ranks #118 of 120 large speakers by sound quality at $70.94.
The Soundcore Boom 3i is the lighter, tougher pick. A warm, punchy waterproof speaker that sounds great and is a strong value. At 1.7 lbs (783 g) it weighs much less than the Zealot S67 at 5.3 lbs (2.4 kg). It is rated IP68 against IPX6 for the Zealot S67. It supports AAC Bluetooth, which the Zealot S67 lacks. Watch for: Not quite as good as a JBL Charge 5, doesn’t go quite as loud or sound quite as balanced, but very very close.
What the Zealot S67 does well: A budget waterproof speaker with a long rated battery, USB-C charging, microSD playback, and stereo pairing. It keeps a wired aux input, which the Soundcore Boom 3i lacks. It plays in stereo from a single unit, unlike the Soundcore Boom 3i. The tradeoff: Sound quality is the catch.
Buy the Soundcore Boom 3i at $118.99 if you want a medium speaker. Buy the Zealot S67 at $70.94 if you want a large speaker instead.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Prices on this page were last checked November 7, 2026 at 7:34 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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Specifications Side By Side
| Soundcore Boom 3i | Zealot S67 | |
|---|---|---|
| Price | $118.99 | $70.94 |
| Ranked | #31 of 179 in Medium Size Portable Bluetooth Speakers | #118 of 120 in Large Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | No | Yes |
| Bass Extension (-10dB) | 56Hz | - |
| Battery Life | 16 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| EQ | Yes | No |
| IP Rating | IP68 | IPX6 |
| Party Mode | No | No |
| Power Input | USB-C | USB-C |
| Stereo | No | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 5.2 |
| Dimensions | 8.3” x 3.3” x 3.1” (210 x 85 x 78.5 mm) | 11.6” x 4.8” x 5.2” (294 x 122 x 132 mm) |
| Drivers | 94mm woofer + tweeter | 60W: Dual drivers + passive radiator |
| Weight | 1.7 lbs (783 g) | 5.3 lbs (2.4 kg) |
| Amplifier Power | 50W | 60W |
| Bluetooth Codecs | SBC, AAC | SBC |
| Built-in Microphone | Yes | Yes |
| Digital Aux Input | No | No |
| Lights | Yes | - |
| Strap | Yes (detachable strap) | - |
| MicroSD Playback | - | Yes |
| Power Bank | - | No |
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