Short answer: the Zealot ZE21. It ranks #18 of 113 boombox speakers by sound quality, rated 4.0/5, at $187.15; the Hopestar A90 ranks #22, rated 3.9/5, and costs $351.65, which makes this an easy call rather than a real tradeoff.
The A90 is the more complete speaker. Side by side it had better highs, clarity and soundstage and still reached deep. The ZE21 has the deeper sub-bass, with owner testing finding output toward the low 30s, but a pronounced kick-bass dip and loud lower mids, and it sounds dirty at low volume.
Battery and size: the ZE21 claims 40 hours at 20.4 lbs (9.27 kg). The A90 claims 6 to 8 hours but its battery is removable, and it adds Auracast and a wireless mic.
Evidence: The A90’s rating comes from listening comparisons, not measurements, and it is sold through AliExpress rather than US retailers.
Buy the Zealot ZE21. It is rated higher for sound quality than the Hopestar A90 and costs less, which makes it the one to get unless you need something the other one does better.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Prices on this page were last checked November 11, 2026 at 3:26 AM 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
| Zealot ZE21 | Hopestar A90 | |
|---|---|---|
| Price | $187.15 | $351.65 |
| Ranked | #18 of 113 in Boombox Size Portable Bluetooth Speakers | #22 of 113 in Boombox Size Portable Bluetooth Speakers |
| App | No | No |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 36Hz | - |
| Battery Life | 40 hours (Manufacturer specified) | 6-8 hours (Manufacturer specified) |
| EQ | Yes (multiple modes) | No |
| IP Rating | IPX6 | IPX6 |
| MicroSD Playback | Yes | Yes |
| Party Mode | Yes (PartyAdd up to 100 speakers) | Yes (Auracast) |
| Power Input | USB-C | - |
| Stereo | Yes | - |
| Omnidirectional | No | No |
| TWS | Yes | - |
| Weight | 20.4 lbs (9.27 kg) | - |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | - |
| Power Bank | Yes (USB-A + USB-C) | - |
| USB Playback | Yes | Yes |
| Built-in Microphone | No | - |
| Amplifier Power | 250W | 700W |
| Dimensions | 16.7” x 10.3” x 14.3” (424 x 262 x 363 mm) | 24.6” x 9.9” x 13.4” (624.5 x 252.5 x 341.5 mm) |
| Drivers | 130W subwoofer + 2x 50mm woofers + passive radiators | 2x 5” woofers + 2x 3.5” midranges + 2x 2.5” tweeters + 2x 2” ceramic tweeters |
| Maximum SPL | 116dB (Manufacturer specified) | - |
| Digital Aux Input | No | - |
| Bluetooth Version | 5.3 | 5.4 |
| Removable Battery | - | Yes |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
| Wireless Microphones | - | Yes 1 Included |
| Lights | - | Yes |
Watch Them Compared
Videos and reviews that test both speakers side by side.
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