Short answer: the Harman Kardon Onyx Studio 4. It ranks #52 of 85 large speakers by sound quality, rated 3.3/5, at $100; the Bogasing S8 Pro ranks #70, rated 2.7/5, and costs $152, so there is not much of a tradeoff to weigh.
The case for the Harman Kardon Onyx Studio 4: Balanced sound quality with deep resonant bass and crisp treble, large dynamic range. Watch for: 8 hour battery at medium volume.
The case for the Bogasing S8 Pro: A compact 1.55kg stereo speaker with aux and microSD playback, USB-C charging, IPX5 splash resistance and TWS pairing. The catch: Its sound modes are the limiting factor: most have large treble peaks that make cymbals and sibilants sound sizzling or harsh, while even Vocal mode is only moderately balanced.
Worth knowing: the Harman Kardon Onyx Studio 4 has been discontinued and is hard to find new at this point.
Buy the Harman Kardon Onyx Studio 4. It is rated higher for sound quality than the Bogasing S8 Pro and costs less, which makes it the one to get unless you need something the other one does better.
If water resistance matters to you, the Bogasing S8 Pro at IPX5 (water jets) holds up far better than the Harman Kardon Onyx Studio 4 at no water resistance.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Harman Kardon Onyx Studio 4 | Bogasing S8 Pro | |
|---|---|---|
| Price | $100 Discontinued | $152 Discontinued |
| Ranked | #52 of 85 in Large Size Portable Bluetooth Speakers | #70 of 85 in Large Size Portable Bluetooth Speakers |
| App | Yes (HK Connect) | No |
| Aux Input | Yes | Yes |
| Battery Life | 8 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| EQ | No | No |
| IP Rating | None | IPX5 |
| Party Mode | Yes (Connect+ up to 100 speakers) | No |
| Power Bank | No | No |
| TWS | Yes | Yes |
| Weight | 4.5 lbs (2.06 kg) | 3.4 lbs (1.55 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 | 5.0 |
| 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) | 10.7” x 2.1” x 2.9” (271 x 53 x 73 mm) |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) | 48Hz - 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 September 29, 2026 at 3:43 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.
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 →
| 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
- Harman Kardon Onyx Studio 4 vs Zealot S97
- Harman Kardon Onyx Studio 4 vs JBL Xtreme 2
- Harman Kardon Onyx Studio 4 vs Tronsmart Halo 100
- Harman Kardon Onyx Studio 4 vs W-King D8
- Harman Kardon Onyx Studio 4 vs Sony SRS-XB43
- Harman Kardon Onyx Studio 4 vs JBL Xtreme
- Harman Kardon Onyx Studio 4 vs Doss Soundbox XL
- Harman Kardon Onyx Studio 4 vs Sony ULT Field 5
- See all 38 comparisons
Bogasing S8 Pro: $152 Discontinued eBay
Newer model: the Bogasing S8 Pro Max, ranked higher, rated 4.2/5.
Pros: A compact 1.55kg stereo speaker with aux and microSD playback, USB-C charging, IPX5 splash resistance and TWS pairing. The Vocal mode is the most restrained of its presets and gives voices the best chance of cutting through the mix.
Cons: Its sound modes are the limiting factor: most have large treble peaks that make cymbals and sibilants sound sizzling or harsh, while even Vocal mode is only moderately balanced. It has no app or EQ for a precise correction and is discontinued in favor of the S8 Pro Max.
Full Bogasing S8 Pro review and specifications →
| Amplifier Power | 60W |
|---|---|
| App | No |
| Aux Input | Yes |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 10.7” x 2.1” x 2.9” (271 x 53 x 73 mm) |
| Drivers | 60W: Dual drivers + passive radiator |
| EQ | No |
| Frequency Response | 48Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX5 |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 3.4 lbs (1.55 kg) |
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons