Short answer: the Harman Kardon Onyx Studio 8. It ranks #10 of 73 boombox speakers by sound quality at $159.99; the Zealot ZE01 ranks #25 and costs $169.99, which makes this an easy call rather than a real tradeoff.
What the Harman Kardon Onyx Studio 8 offers: Warm sound with boosted bass. Watch for: Not as loud as others. No water rating.
What the Zealot ZE01 offers: Appears to be the same internals as the S95 Watch for: A little rolled off up top and not that balanced through the rest of the range. Clarity isn’t as good as better speakers.
Buy the Harman Kardon Onyx Studio 8. It ranks higher for sound quality than the Zealot ZE01 and costs less, which settles it without a real tradeoff to make.
If battery life is a priority, the Zealot ZE01 is rated for 40 hours versus 8 hours for the Harman Kardon Onyx Studio 8.
There is a real gap in water resistance: the Zealot ZE01 at IPX6 (powerful water jets) against the Harman Kardon Onyx Studio 8, which has no water resistance.
Specifications Side By Side
| Harman Kardon Onyx Studio 8 | Zealot ZE01 | |
|---|---|---|
| Price | $159.99 | $169.99 |
| Ranked | #10 of 73 in Boombox Size Portable Bluetooth Speakers | #25 of 73 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Aux Latency | 42ms | - |
| Bass Extension (-10dB) | 35Hz | 45Hz |
| Battery Life | 8 hours (Manufacturer specified) | 40 hours (Manufacturer specified) |
| Built in Microphone | Yes | No |
| IP Rating | None | IPX6 |
| Bluetooth Latency | 175ms | - |
| Max Volume | 96dB | - |
| Power Input | DC Barrel Connector (19V/2.1A) | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 7.3 lbs / 3.3 kg | 13.2 lbs / 6.0 kg |
| App | Yes (Harman Kardon One app) | No |
| Bluetooth Codecs | SBC | SBC |
| Power Bank | No | Yes (USB-A + USB-C) |
| EQ | Yes (App EQ) | Yes (multiple modes) |
| Party Mode | No | No |
| USB Playback | No | Yes |
| Bluetooth Version | 5.2 | - |
| Output Power | 50W RMS | 120W RMS / 150W peak |
| Dimensions | 10.6" x 11.9" x 6.3" (268 x 302.5 x 159.5 mm) | 13.1" x 11.2" x 8.1" (332 x 284 x 207 mm) |
| Drivers | 2x 75mm woofers + 2x 20mm tweeters | Dual 120mm speakers + dual 42mm speakers |
| Digital Aux Input | No | No |
| MicroSD Playback | - | Yes |
Related Speaker Comparisons
Other pairings from the same speaker class worth checking:
- Harman Kardon Onyx Studio 6 vs Soundcore Rave Party 2
- Soundcore Boom 2 Plus vs Zealot S78
- Tribit Stormbox Blast vs Zealot S95
- Tribit Stormbox Blast vs Harman Kardon Onyx Studio 8
- Harman Kardon Onyx Studio 8 vs Soundcore Boom 2 Plus
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
Harman Kardon Onyx Studio 8: $159.99 Amazon eBay
Pros: Warm sound with boosted bass.
Cons: Not as loud as others. No water rating.
Full Harman Kardon Onyx Studio 8 review and specifications →
| App | Yes (Harman Kardon One app) |
|---|---|
| Aux Input | Yes |
| Aux Latency | 42ms |
| Bass Extension (-10dB) | 35Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 175ms |
| Bluetooth Version | 5.2 |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 10.6" x 11.9" x 6.3" (268 x 302.5 x 159.5 mm) |
| Drivers | 2x 75mm woofers + 2x 20mm tweeters |
| EQ | Yes (App EQ) |
| IP Rating | None |
| Max Volume | 96dB |
| Omnidirectional | No |
| Output Power | 50W RMS |
| Party Mode | No |
| Power Bank | No |
| Power Input | DC Barrel Connector (19V/2.1A) |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | No |
| Weight | 7.3 lbs / 3.3 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: Harman Kardon Onyx Studio 8 review - part 2 of 3 More from alanrossreviews →
- Alan Ross Reviews: Onyx Studio 8 vs HK Onyx 6, Xtreme 3, PartyBox Encore, Go+ Play, Bag of Riddim! part 3 of 3
- Alan Ross Reviews: Dead room vs Live room - Onyx studio 8 self tuning test! part 1 of 3
- Alan Ross Reviews: Ultimate HK Onyx Studio speaker review and comparison! 8 speakers!
- Reddit Search for Harman Kardon Onyx Studio 8 Review
- Head-to-Head Comparisons
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Zealot ZE01: $169.99 Amazon Aliexpress eBay
Pros: Appears to be the same internals as the S95
Cons: A little rolled off up top and not that balanced through the rest of the range. Clarity isn’t as good as better speakers.
Full Zealot ZE01 review and specifications →
| App | No |
|---|---|
| Aux Input | Yes |
| Bass Extension (-10dB) | 45Hz |
| Battery Life | 40 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Built in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 13.1" x 11.2" x 8.1" (332 x 284 x 207 mm) |
| Drivers | Dual 120mm speakers + dual 42mm speakers |
| EQ | Yes (multiple modes) |
| IP Rating | IPX6 |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Output Power | 120W RMS / 150W peak |
| Party Mode | No |
| Power Bank | Yes (USB-A + USB-C) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 13.2 lbs / 6.0 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Bullionix_Gadgets_Reviews: ZEALOT ZE-01 VS ZEALOT S-95! 😱: Sound Comparison!!!
- Techder Audios: ZEALOT S89 VS ZEALOT ZE01 EXTREME POWERFULL VS COMPACTER BASS PERFORMANCE! More from techderaudios →
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- Techder Audios: Zealot ZE01 VS Xdobo BMTL Wow Max DEEPER BASS VS LOUDER BASS?!
- Reddit Search for Zealot ZE01 Review
- Head-to-Head Comparisons