Short answer: the Zealot S67, if you are buying new. The Harman Kardon Onyx Studio 4 ranks higher than it (#67 vs #104 of 105 large speakers, 3.3/5 vs 2.0/5) but is discontinued, so only consider it used; the Zealot S67 is still sold new at $70.94. The Harman Kardon Onyx Studio 4’s replacement, the Harman Kardon Onyx Studio 9, is still sold new.
The Harman Kardon Onyx Studio 4 is the better-sounding option. Balanced sound quality with deep resonant bass and crisp treble, large dynamic range. It links with other speakers (Connect+ up to 100 speakers), which the Zealot S67 cannot. Watch for: 8 hour battery at medium volume.
The Zealot S67 is the longer-running, tougher pick. It offers a lot of practical hardware for a 5.3 lbs (2.4 kg) budget speaker: IPX6 water resistance, USB-C charging, aux and microSD playback, speakerphone, a claimed 20-hour battery and TWS pairing for a second unit. It is rated for 20 hours of battery against 8 for the Harman Kardon Onyx Studio 4. It is rated IPX6, while the Harman Kardon Onyx Studio 4 has no water resistance. Watch for: Sound quality is the catch.
Buy the Zealot S67 new; the Harman Kardon Onyx Studio 4 is no longer sold new, so it only makes sense as a used find.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Harman Kardon Onyx Studio 4 | Zealot S67 | |
|---|---|---|
| Price | $100 Discontinued | $70.94 |
| Ranked | #67 of 105 in Large Size Portable Bluetooth Speakers | #104 of 105 in Large Size Portable Bluetooth Speakers |
| App | Yes (HK Connect) | No |
| Aux Input | Yes | Yes |
| Battery Life | 8 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| EQ | No | No |
| IP Rating | None | IPX6 |
| Party Mode | Yes (Connect+ up to 100 speakers) | No |
| Power Bank | No | No |
| TWS | Yes | Yes |
| Weight | 4.5 lbs (2.06 kg) | 5.3 lbs (2.4 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Built-in Microphone | Yes | Yes |
| Power Input | DC Barrel Connector (19V/2.1A) | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Bluetooth Version | 4.2 | 5.2 |
| Drivers | 2x 75mm woofers + 2x 20mm tweeters + 1x passive radiator | 60W: Dual drivers + passive radiator |
| Dimensions | 11.4” x 11.4” x 5.1” (290 x 290 x 130 mm) | 11.6” x 4.8” x 5.2” (294 x 122 x 132 mm) |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 60W | 60W |
| Digital Aux Input | No | No |
| Strap | No | - |
| MicroSD Playback | - | Yes |
Related Speaker Comparisons
How Harman Kardon Onyx Studio 4 compares with other leading options:
- JBL Xtreme 5 vs Harman Kardon Onyx Studio 4
- Tribit Stormbox Lava vs Harman Kardon Onyx Studio 4
- Soundcore Boom 2 vs Harman Kardon Onyx Studio 4
- Marshall Stockwell II vs Harman Kardon Onyx Studio 4
- Harman Kardon Citation 200 vs Harman Kardon Onyx Studio 4
Prices on this page were last checked October 12, 2026 at 4:13 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 4: $100 Discontinued eBay
Newer model: the Harman Kardon Onyx Studio 9, rated 4.1/5, released Dec 2024. See every Harman Kardon Onyx Studio generation.
Pros: Balanced sound quality with deep resonant bass and crisp treble, large dynamic range. Multi-host Bluetooth connectivity for 2 phones, daisy chaining up to 100 speakers. Elegant modern design with smooth curves and premium materials.
Cons: 8 hour battery at medium volume. Not at loud as others. Not as deep of bass as the newer Onyx. External AC power brick for charging. Discontinued.
Full Harman Kardon Onyx Studio 4 review and specifications →
| Released | Aug 2017 (9 years ago) |
|---|---|
| Amplifier Power | 60W |
| App | Yes (HK Connect) |
| Aux Input | Yes |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 4.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 11.4” x 11.4” x 5.1” (290 x 290 x 130 mm) |
| Drivers | 2x 75mm woofers + 2x 20mm tweeters + 1x passive radiator |
| EQ | No |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) |
| IP Rating | None |
| Omnidirectional | No |
| Party Mode | Yes (Connect+ up to 100 speakers) |
| Power Bank | No |
| Power Input | DC Barrel Connector (19V/2.1A) |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| Weight | 4.5 lbs (2.06 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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- Harman Kardon Onyx Studio 4 vs Zealot S97
- Harman Kardon Onyx Studio 4 vs JBL Xtreme
- Harman Kardon Onyx Studio 4 vs JBL Xtreme 2
- Harman Kardon Onyx Studio 4 vs DOSS Soundbox XL
- Harman Kardon Onyx Studio 4 vs Klipsch Detroit
- Harman Kardon Onyx Studio 4 vs Sony SRS-XG300
- Harman Kardon Onyx Studio 4 vs W-King D8
- See all 47 comparisons
Zealot S67: $70.94 AliExpress $70.94 eBay
Pros: It offers a lot of practical hardware for a 2.4kg budget speaker: IPX6 water resistance, USB-C charging, aux and microSD playback, speakerphone, a claimed 20-hour battery and TWS pairing for a second unit. The large enclosure and dual-driver/passive-radiator layout can provide useful party-level volume.
Cons: Sound quality is the catch. Independent reviewer comparisons report obvious distortion once volume rises past roughly halfway, little true deep bass, and a rolled-off, low-detail treble. There is no app or real EQ to correct that balance, so its long feature list does not make it a good pick for attentive music listening.
Full Zealot S67 review and specifications →
| Released | Sep 2021 (5 years ago) |
|---|---|
| Amplifier Power | 60W |
| App | No |
| Aux Input | Yes |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 11.6” x 4.8” x 5.2” (294 x 122 x 132 mm) |
| Drivers | 60W: Dual drivers + passive radiator |
| EQ | No |
| IP Rating | IPX6 |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 5.3 lbs (2.4 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Jay’s Straight Up Reviews & More: ZEALOT S-67 🦨 75w Bluetooth Speaker Review🤦🏼♂️ & Comparison With W-King X10. More from JaysStraightUpReviews →
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- YARNZO Tech: Sound test between Zealot s67, zealot s56, zealot s39. More from YARNZO Tech →
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