Short answer: the Zealot ZE21. It ranks #18 of 85 boombox speakers by sound quality, rated 4.0/5, at $247.41; 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 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.
Specifications Side By Side
| Zealot ZE21 | Hopestar A90 | |
|---|---|---|
| Price | $187.15 | $351.65 |
| Ranked | #18 of 85 in Boombox Size Portable Bluetooth Speakers | #22 of 85 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 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 |
Related Speaker Comparisons
How Zealot ZE21 compares with other leading options:
- Tribit Stormbox Blast vs Zealot ZE21
- Harman Kardon Go + Play 3 vs Zealot ZE21
- JBL Partybox Encore 2 vs Zealot ZE21
- JBL Partybox Encore Essential 2 vs Zealot ZE21
- JBL Partybox Encore vs Zealot ZE21
Prices on this page were last checked September 26, 2026 at 11:14 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
Zealot ZE21: $187.15 Amazon AliExpress eBay
Pros: The ZE21’s main attraction is unusually deep bass for a battery boombox: owner testing finds real output in the 40-50Hz region and audibility down toward the low 30s. Its TWS button can form a stereo pair with another compatible Zealot, and its large, rugged chassis gives it credible party-speaker scale. Measured bass extension of 36Hz (-10dB).
Cons: That deep-bass emphasis comes with a pronounced 60-110Hz kick-bass dip and over-loud 250-600Hz lower mids, which can make rock and pop sound hollow or boxy. The supplied sound modes do not fully correct the tuning; the most positive independent report required source-side parametric EQ. Treble is also soft and clarity trails better-tuned rivals.
Full Zealot ZE21 review and specifications →
| Amplifier Power | 250W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 36Hz |
| Battery Life | 40 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 16.7” x 10.3” x 14.3” (424 x 262 x 363 mm) |
| Drivers | 130W subwoofer + 2x 50mm woofers + passive radiators |
| EQ | Yes (multiple modes) |
| IP Rating | IPX6 |
| Maximum SPL | 116dB (Manufacturer specified) |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Party Mode | Yes (PartyAdd up to 100 speakers) |
| Power Bank | Yes (USB-A + USB-C) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 20.4 lbs (9.27 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Jagist reviews: Jbl Boombox 4 Vs Zealot Ze21!!! More from Jagistreviews →
- Jagist reviews: Zealot Ze21 Vs Tribit Stormbox Blast 2!!!
- Techder Audios: JBL Boombox 4 VS Zealot ZE21 BATTLE OF THE BOOMBOXES! More from techderaudios →
- Jay’s Straight Up Reviews & More: Zealot ZE21 vs JBL Boombox 3 Tailgater Special @20ft. The Budget Beast Against the OG Boombox More from JaysStraightUpReviews →
- Head-to-Head Comparisons
Hopestar A90: $351.65 AliExpress eBay
Pros: A huge, powerful 700W boombox with eight drivers (two 5” woofers, two 3.5” midranges and four tweeters), a removable 36,000mAh battery and a wireless microphone. In side by side tests it had better highs, clarity and soundstage than the Zealot ZE21 while still reaching deep, reviewers picked it over the JBL Boombox 4 for its bass and output, and it sounded powerful and true to the music against the JBL PartyBox Encore Essential 2. Bluetooth 5.4 with Auracast, IPX6, USB, TF and aux inputs, RGB lights and a strap attachment.
Cons: The JBL PartyBox Encore Essential 2 was the better, more refined listen in a direct comparison. The Yeahbox Sonic Boom Ultra measured roughly 3 to 5dB louder. There is no app or EQ, and the evidence is listening comparisons rather than measurements. It is very large and heavy (13.2 kg boxed), claims only 6 to 8 hours of battery, and it is sold through AliExpress rather than US retailers.
Full Hopestar A90 review and specifications →
| Amplifier Power | 700W |
|---|---|
| App | No |
| Aux Input | Yes |
| Battery Life | 6-8 hours (Manufacturer specified) |
| Bluetooth Version | 5.4 |
| Dimensions | 24.6” x 9.9” x 13.4” (624.5 x 252.5 x 341.5 mm) |
| Drivers | 2x 5” woofers + 2x 3.5” midranges + 2x 2.5” tweeters + 2x 2” ceramic tweeters |
| EQ | No |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX6 |
| Lights | Yes |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Removable Battery | Yes |
| USB Playback | Yes |
| Wireless Microphones | Yes 1 Included |
- Reviews, Comparisons and Sound Samples
- Jagist reviews: Hopestar A90 Vs Jbl Boombox 4!!! Battle Of The Gods!!! More from Jagistreviews →
- Jagist reviews: Jbl Boombox 4 Firmware Updated Vs Hopestar A90!!! Rematch Of Beasts!!!
- Jagist reviews: Hopestar A90 Vs Zealot Ze41!!! Battle Of Shear Power!!!
- Jagist reviews: Hopestar A90 Vs Zealot Ze21!!! Deep Bass Vs Powerful Bass!!!
- Jagist reviews: Hopestar A90 Vs Jbl Encore Essential 2!!! Deep Bass Vs Powerhouse Bass!!!
- Head-to-Head Comparisons