Short answer: the Tronsmart Halo 200 for runtime, the Onyx Studio 9 for a fuller feature set. The Halo 200 packs a 15,000mAh battery rated 18 hours, though its bass is not as deep as some of the top ranked. The Onyx Studio 9 adds Auracast multi-speaker connection alongside classic stereo pairing, but 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, and the $15 saving on the Tronsmart Halo 200 is not enough to make up the difference.
Water resistance is not close: the Tronsmart Halo 200 is rated at IPX4 (splashing), well ahead of the Harman Kardon Onyx Studio 9 at no water resistance.
Want more options? Browse the full Portable Bluetooth rankings.
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Specifications Side By Side
| Harman Kardon Onyx Studio 9 | Tronsmart Halo 200 | |
|---|---|---|
| Price | $184.99 | $169.99 |
| Ranked | #15 of 113 in Boombox Size Portable Bluetooth Speakers | #76 of 113 in Boombox Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | 41Hz | 44Hz |
| Maximum SPL | 101dB (measured by Alan Ross Reviews) | 110dB (measured by Alan Ross Reviews) |
| IP Rating | None | IPX4 |
| Power Input | AC Power Cable (2-Prong) | USB-C |
| Stereo | Yes | Partially |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 9.3 lbs (4.2 kg) | 13.4 lbs (6.1 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 | 5.3 |
| Battery Life | 8 hours (Manufacturer specified) | 18 hours (Manufacturer specified) |
| Amplifier Power | 50W RMS | 120W |
| Dimensions | 11.4” x 11.3” x 5.1” (289.2 x 287.5 x 130 mm) | 15.2” x 11.1” x 10.5” (386 x 282 x 266 mm) |
| Drivers | 120mm woofer + 3x 20mm tweeters | 1x 5.7” (145mm) woofer + 2x 2.24” (57mm) mid-tweeters + 1x 1.22” (31mm) tweeter |
| Digital Aux Input | No | No |
| Aux Input | No | Yes |
| Strap | No | - |
| Aux Latency | - | 16ms |
| Guitar Input | - | Yes |
| Bluetooth Latency | - | 160ms |
| Microphone Input | - | Yes (Karaoke mode with echo effect) |
| Power Bank | - | Yes (USB-A) |
| Built-in Microphone | - | No |
| MicroSD Playback | - | No |
| Lights | - | Yes |
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