Short answer: the W-King D8. It ranks #57 of 105 large speakers by sound quality (rated 3.5/5) at $69.99 and is still sold new; the Harman Kardon Onyx Studio 4 ranks #67 (rated 3.3/5) and is discontinued, so it is only an option used. The Harman Kardon Onyx Studio 4’s replacement, the Harman Kardon Onyx Studio 9, is still sold new.
The W-King D8 is the longer-running, tougher pick. Claimed 24 hours (manufacturer specified) battery life, ipx7 protection, up to 101db and stereo playback make its feature set practical for its intended room or portable use. It is rated for 24 hours of battery against 8 for the Harman Kardon Onyx Studio 4. It is rated IPX7, while the Harman Kardon Onyx Studio 4 has no water resistance.
What the Harman Kardon Onyx Studio 4 does well: 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 W-King D8 cannot. The tradeoff: 8 hour battery at medium volume.
Buy the W-King D8. It is rated higher for sound quality, and the Harman Kardon Onyx Studio 4 is discontinued, so it is only available used.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| W-King D8 | Harman Kardon Onyx Studio 4 | |
|---|---|---|
| Price | $69.99 | $100 Discontinued |
| Ranked | #57 of 105 in Large Size Portable Bluetooth Speakers | #67 of 105 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 49Hz | - |
| Battery Life | 24 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| Maximum SPL | 101dB (measured by Alan Ross Reviews) | - |
| 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 | Yes | Yes |
| 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 |
| Amplifier 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 + 1x passive radiator |
| Digital Aux Input | No | No |
| Bluetooth Version | 5.0 | 4.2 |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
| Strap | - | No |
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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
W-King D8: $69.99 Amazon $69.99 eBay
Pros: At 2.43 kg, W-King D8 combines 2x 70mm woofers + 2x 31mm tweeters + passive radiators with Bluetooth and aux. Claimed 24 hours (manufacturer specified) battery life, ipx7 protection, up to 101db and stereo playback make its feature set practical for its intended room or portable use. Measured bass extension of 49Hz (-10dB).
Cons: Bass is limited by its 49Hz specification. There is no companion app. No EQ adjustment.
Full W-King D8 review and specifications →
| Released | Jan 2020 (6 years ago) |
|---|---|
| Amplifier Power | 90W max / 50W RMS |
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 49Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.0 |
| 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 |
| Maximum SPL | 101dB (measured by Alan Ross Reviews) |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | No |
| Weight | 5.4 lbs (2.43 kg) |
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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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