Short answer: the W-King D8. It ranks #43 of 77 large speakers by sound quality at $79.98; the Harman Kardon Onyx Studio 4 ranks #47 and costs $100, so there is not much of a tradeoff to weigh.
What the W-King D8 offers: Decent sounding. Watch for: Slightly recessed mids. Distorted at high volumes.
What the Harman Kardon Onyx Studio 4 offers: 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. Watch for: 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.
Buy the W-King D8. It ranks higher for sound quality than the Harman Kardon Onyx Studio 4 and costs less, so the other one has nothing left to offer.
There is a real battery-life gap here: the W-King D8 is rated for 24 hours, the Harman Kardon Onyx Studio 4 only 8 hours.
If water resistance matters to you, the W-King D8 at IPX7 (brief submersion) holds up far better than the Harman Kardon Onyx Studio 4 at no water resistance.
Specifications Side By Side
| W-King D8 | Harman Kardon Onyx Studio 4 | |
|---|---|---|
| Price | $79.98 | $100 Discontinued |
| Ranked | #43 of 77 in Large Size Portable Bluetooth Speakers | #47 of 77 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 49Hz | - |
| Battery Life | 24 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| Max Volume | 101dB | - |
| MicroSD Playback | Yes | - |
| Power Bank | Yes (USB-A) | No |
| TWS | No | Yes |
| Weight | 5.4 lbs / 2.43 kg | 4.5 lbs / 2.06 kg |
| App | No | Yes (HK Connect) |
| Bluetooth Codecs | SBC | SBC |
| Built in Microphone | Yes | Yes |
| EQ | No | No |
| IP Rating | IPX7 | None |
| Party Mode | No | Yes (Connect+ up to 100 speakers) |
| Power Input | USB-C | DC Barrel Connector (19V/2.1A) |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Output Power | 90W max / 50W RMS | 60W |
| Dimensions | 12.6" x 4.8" x 4.7" (320 x 121.9 x 119.4 mm) | 11.4" x 11.4" x 5.1" (290 x 290 x 130 mm) |
| Drivers | 2x 70mm woofers + 2x 31mm tweeters + passive radiators | 2x 75mm woofers, 2x 20mm tweeters |
| Digital Aux Input | No | No |
| Bluetooth Version | - | 4.2 |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
| Discontinued | - | Yes |
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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
W-King D8: $79.98 Amazon eBay
Pros: Decent sounding.
Cons: Slightly recessed mids. Distorted at high volumes.
Full W-King D8 review and specifications →
| App | No |
|---|---|
| Aux Input | Yes |
| Bass Extension (-10dB) | 49Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 12.6" x 4.8" x 4.7" (320 x 121.9 x 119.4 mm) |
| Drivers | 2x 70mm woofers + 2x 31mm tweeters + passive radiators |
| EQ | No |
| IP Rating | IPX7 |
| Max Volume | 101dB |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Output Power | 90W max / 50W RMS |
| Party Mode | No |
| Power Bank | Yes (USB-A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | No |
| Weight | 5.4 lbs / 2.43 kg |
- Reviews, Comparisons and Sound Samples
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Harman Kardon Onyx Studio 4: $100 Discontinued eBay
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 →
| App | Yes (HK Connect) |
|---|---|
| Aux Input | Yes |
| Battery Life | 8 hours (Manufacturer specified) |
| 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) |
| Discontinued | Yes |
| Drivers | 2x 75mm woofers, 2x 20mm tweeters |
| EQ | No |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) |
| IP Rating | None |
| Omnidirectional | No |
| Output Power | 60W |
| Party Mode | Yes (Connect+ up to 100 speakers) |
| Power Bank | No |
| Power Input | DC Barrel Connector (19V/2.1A) |
| Stereo | Yes |
| TWS | Yes |
| Weight | 4.5 lbs / 2.06 kg |
- Links
- Reviews, Comparisons and Sound Samples
- Geri’s Collection: Harman Kardon Onyx 7 vs Onyx 4
- OCM Reviews: Onyx Studio 4 Vs Onyx Studio 5 - Sound Quality Comparison - Bluetooth Speaker
- Alan Ross Reviews: Ultimate HK Onyx Studio speaker review and comparison! 8 speakers! More from alanrossreviews →
- Reddit Search for Harman Kardon Onyx Studio 4 Review
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