Short answer: the Treblab HD-Max, though neither ranks well in its class. It ranks #104 of 120 large speakers by sound quality, rated 2.4/5, at $123.47. The Zealot S67 ranks #118, rated 2.0/5, at $70.94, $52.53 cheaper, not enough of a saving to outweigh the sound-quality gap. Both are rated below 3.0/5 among the 120 large speakers, and the Tribit Stormbox Lava, ranked #3 at $139.99, is a better place to start if sound quality matters.
The Treblab HD-Max is the better-sounding option. A very loud, well built boombox with a long tested battery, water resistance, and power bank charging. The catch: Boosted upper bass, not much lower bass.
What the Zealot S67 does well: A budget waterproof speaker with a long rated battery, USB-C charging, microSD playback, and stereo pairing. The catch: Sound quality is the catch.
Buy the Treblab HD-Max. It is rated higher for sound quality, and the $52.53 saving on the Zealot S67 is not enough to make up the difference.
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
| Treblab HD-Max | Zealot S67 | |
|---|---|---|
| Price | $123.47 | $70.94 |
| Ranked | #104 of 120 in Large Size Portable Bluetooth Speakers | #118 of 120 in Large Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | ~60Hz | - |
| Battery Life | 20 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| IP Rating | IPX6 | IPX6 |
| Power Bank | Yes (USB-A, 5V) | No |
| Power Input | USB-C | USB-C |
| Weight | 5.1 lbs (2.3 kg) | 5.3 lbs (2.4 kg) |
| App | No | No |
| Aux Input | Yes | Yes |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Built-in Microphone | Yes | Yes |
| EQ | No | No |
| Party Mode | No | No |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Bluetooth Version | 5.3 | 5.2 |
| Drivers | 2x 75mm woofers, 2x 30mm tweeters | 60W: Dual drivers + passive radiator |
| Dimensions | 12.2” x 5.3” x 5.6” (310 x 135 x 143 mm) | 11.6” x 4.8” x 5.2” (294 x 122 x 132 mm) |
| Frequency Response | 30Hz - 16kHz (Manufacturer specified) | - |
| Amplifier Power | 60W | 60W |
| Digital Aux Input | No | No |
| Strap | Yes (detachable shoulder strap) | - |
| MicroSD Playback | - | Yes |
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