Short answer: the Onyx Studio 9 for sound, the W-King H10 if you need a microphone. The H10 comes with a wireless microphone but has not very deep bass. The Onyx Studio 9 adds Auracast multi-speaker connection alongside classic stereo pairing, though it has slightly recessed mids, a boost in the upper mids and rolled off upper treble.
Buy the Harman Kardon Onyx Studio 9. It is rated higher for sound quality; the W-King H10 is no longer sold new.
If battery life is a priority, the W-King H10 is rated for 24 hours versus 8 hours for the Harman Kardon Onyx Studio 9.
If water resistance matters to you, the W-King H10 at IPX6 (powerful water jets) holds up far better than the Harman Kardon Onyx Studio 9 at no water resistance.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
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Specifications Side By Side
| Harman Kardon Onyx Studio 9 | W-King H10 | |
|---|---|---|
| Price | $184.99 | $215 Discontinued |
| Ranked | #15 of 113 in Boombox Size Portable Bluetooth Speakers | #79 of 113 in Boombox Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | 41Hz | 54Hz |
| Maximum SPL | 101dB (measured by Alan Ross Reviews) | 115dB (measured by Alan Ross Reviews) |
| IP Rating | None | IPX6 |
| Power Input | AC Power Cable (2-Prong) | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 9.3 lbs (4.2 kg) | 7.1 lbs (3.2 kg) |
| App | Yes (Harman Kardon One app) | No |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| EQ | Yes (App EQ) | Yes (multiple modes) |
| Party Mode | Yes (Auracast) | No |
| USB Playback | No | Yes |
| Bluetooth Version | 5.3 | 5.0 |
| Battery Life | 8 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Amplifier Power | 50W RMS | 120W RMS |
| Dimensions | 11.4” x 11.3” x 5.1” (289.2 x 287.5 x 130 mm) | 14.5” x 9.9” (368.3 x 251.7 mm) (incomplete) |
| Drivers | 120mm woofer + 3x 20mm tweeters | 1x 5.25” (133mm) subwoofer + 2x 31mm midrange drivers + 2x 3” (76mm) tweeters |
| Digital Aux Input | No | No |
| Aux Input | No | Yes |
| Strap | No | - |
| Aux Latency | - | 0ms |
| Bluetooth Latency | - | 150ms |
| MicroSD Playback | - | Yes |
| Power Bank | - | Yes (USB-A) |
| Wireless Microphones | - | Yes 2 Included |
| Built-in Microphone | - | Yes |
| Microphone Input | - | Yes (Karaoke mode with echo effect) |
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