Short answer: the Harman Kardon Onyx Studio 7. It ranks #14 of 91 boombox speakers by sound quality, rated 4.1/5, at $248.90. The W-King X20S ranks #30, rated 3.8/5, at $150.99, $97.91 cheaper, which does not close the gap in sound quality.
The Harman Kardon Onyx Studio 7 is the lighter pick. The addition of dual tweeters gives the Studio 7 a wider, more spacious presentation than older Onyx models. At 6.4 lbs (2.9 kg) it weighs much less than the W-King X20S at 13.8 lbs (6.25 kg). Watch for: Consumer Reports finds the bass prominent and boomy, mids hazy, treble slightly smeared and the soundstage congested.
The W-King X20S is the tougher choice. Clearer and smoother than the larger W-King X20 at about half its size and weight, and in side by side tests it held its own against the Harman Kardon Go + Play 3, with nicer, more exposed mids and more volume. It is rated IPX7, while the Harman Kardon Onyx Studio 7 has no water resistance. The tradeoff: Less bass and depth than the X20 and about 3dB quieter, and at maximum volume its mids and highs start to drown out the bass.
Buy the Harman Kardon Onyx Studio 7. It is rated higher for sound quality, and saving $97.91 with the W-King X20S does not make up for the sound-quality gap.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Harman Kardon Onyx Studio 7 | W-King X20S | |
|---|---|---|
| Price | $248.90 | $150.99 |
| Ranked | #14 of 91 in Boombox Size Portable Bluetooth Speakers | #30 of 91 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Aux Latency | 0ms | - |
| Bass Extension (-10dB) | 37Hz | - |
| Battery Life | 8 hours (Manufacturer specified) | - |
| Built-in Microphone | Yes | Yes |
| IP Rating | None | IPX7 |
| Bluetooth Latency | 266ms | - |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (Wireless Dual Sound) | - |
| Power Input | DC Barrel Connector (19V/2.1A) | - |
| Stereo | Partially (1 woofer) | - |
| Omnidirectional | No | No |
| TWS | No | Yes |
| Weight | 6.4 lbs (2.9 kg) | 13.8 lbs (6.25 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | - |
| App | No | - |
| EQ | No | - |
| Power Bank | No | - |
| USB Playback | No | Yes |
| Amplifier Power | 50W RMS | 140W RMS (180W peak) |
| Dimensions | 11.3” x 11.3” (285.8 x 285.8 mm) (round design) | - |
| Drivers | 120mm woofer + 2x 25mm tweeters | - |
| Digital Aux Input | No | - |
| Bluetooth Version | 4.2 | 5.4 |
| Strap | No | Yes (detachable shoulder strap) |
| MicroSD Playback | - | Yes |
| FM Tuner | - | Yes |
Related Speaker Comparisons
More worthwhile head-to-heads for Harman Kardon Onyx Studio 7:
- Tribit Stormbox Blast vs Harman Kardon Onyx Studio 7
- Harman Kardon Go + Play 3 vs Harman Kardon Onyx Studio 7
- JBL Partybox Encore 2 vs Harman Kardon Onyx Studio 7
- JBL PartyBox On-The-Go 2 Plus vs Harman Kardon Onyx Studio 7
- JBL Partybox Encore Essential 2 vs Harman Kardon Onyx Studio 7
Prices on this page were last checked October 4, 2026 at 9:58 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 7: $248.90 Amazon eBay
Newer model: the Harman Kardon Onyx Studio 9, ranked lower, rated 4.1/5.
Pros: The addition of dual tweeters gives the Studio 7 a wider, more spacious presentation than older Onyx models. It delivers strong, deep bass, useful large-room volume and can pair with a second Studio 7 for stereo. Measured bass extension of 37Hz (-10dB).
Cons: Consumer Reports finds the bass prominent and boomy, mids hazy, treble slightly smeared and the soundstage congested. Battery life remains only about eight hours, it has no water rating or advanced codecs, and it is not an especially loud outdoor speaker.
Full Harman Kardon Onyx Studio 7 review and specifications →
| Amplifier Power | 50W RMS |
|---|---|
| App | No |
| Aux Input | Yes |
| Aux Latency | 0ms |
| Bass Extension (-10dB) | 37Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 266ms |
| Bluetooth Version | 4.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 11.3” x 11.3” (285.8 x 285.8 mm) (round design) |
| Drivers | 120mm woofer + 2x 25mm tweeters |
| EQ | No |
| IP Rating | None |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (Wireless Dual Sound) |
| Power Bank | No |
| Power Input | DC Barrel Connector (19V/2.1A) |
| Stereo | Partially (1 woofer) |
| Strap | No |
| TWS | No |
| USB Playback | No |
| Weight | 6.4 lbs (2.9 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: JBL Boombox 2 vs Onyx Studio 7 big bass battle 💋 More from alanrossreviews →
- Alan Ross Reviews: Onyx Studio 7 vs Onyx Studio 6 - massive deep bass battle 😁
- Geri’s Collection: Harman Kardon Onyx 7 vs Onyx 4
- KULAS TECH SHOW: Harman / Kardon Onyx Studio 5 vs Onyx Studio 7 - Close battle🔥🔥 More from KULASTECHSHOW20 →
- Alan Ross Reviews: Ultimate HK Onyx Studio speaker review and comparison! 8 speakers!
- Head-to-Head Comparisons
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W-King X20S: $150.99 AliExpress W-King eBay
Pros: Clearer and smoother than the larger W-King X20 at about half its size and weight, and in side by side tests it held its own against the Harman Kardon Go + Play 3, with nicer, more exposed mids and more volume. 140W RMS (180W peak), IPX7, Bluetooth 5.4, a built-in microphone, TF card, USB and aux playback, FM radio, a carry handle and a shoulder strap.
Cons: Less bass and depth than the X20 and about 3dB quieter, and at maximum volume its mids and highs start to drown out the bass. With a flat EQ the bass is cut off, so it needs the bass boost. The JBL PartyBox Encore Essential 2 sounded better in a direct comparison. Sold direct from W-King in the US.
Full W-King X20S review and specifications →
| Amplifier Power | 140W RMS (180W peak) |
|---|---|
| Aux Input | Yes |
| Bluetooth | Yes |
| Bluetooth Version | 5.4 |
| Built-in Microphone | Yes |
| FM Tuner | Yes |
| IP Rating | IPX7 |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Strap | Yes (detachable shoulder strap) |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 13.8 lbs (6.25 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Jagist reviews: W-king X20 Vs W-king X20S!!! More from Jagistreviews →
- Jagist reviews: W-king X20s Vs Harman Kardon Go Plus Play 3!!!
- Mateusz Cholewa: 140W W-KING X20S vs 160W HK Go Plus Play 3 More from Mateusz Cholewa →
- Jagist reviews: Jbl Encore Essential 2 Vs W-king X20s!!!
- Jagist reviews: W-king X20s Vs Tribit Stormbox Blast!!!
- Head-to-Head Comparisons