Short answer: the Harman Kardon Onyx Studio 9 is the smoother indoor music speaker; the Tribit Stormbox Blast is the louder, longer-running outdoor value. Harman Kardon is #15 of 113 and Tribit is #2 of 113.
Onyx Studio 9 has three tweeters, app EQ, stereo pairing, Auracast, and a measured 41Hz bass point. Its smooth, non-fatiguing sound works well in a living room, but it has no water resistance and only an eight-hour claimed battery.
Stormbox Blast reaches 108dB, claims 30 hours, has 43Hz bass extension, and can be made more neutral with its available EQ. It is less detailed than the best speakers, but it has far more party-speaker stamina.
Buy the Harman Kardon Onyx Studio 9 at $184.99 for a refined indoor presentation and app-based tuning.
Buy the Tribit Stormbox Blast at $199.99 for higher output, long runtime, and more capable outdoor use.
If water resistance matters to you, the Tribit Stormbox Blast at IPX7 (brief submersion) holds up far better than the Harman Kardon Onyx Studio 9 at no water resistance.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Prices on this page were last checked November 7, 2026 at 7:34 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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Specifications Side By Side
| Harman Kardon Onyx Studio 9 | Tribit Stormbox Blast | |
|---|---|---|
| Price | $184.99 | $199.99 |
| Ranked | #15 of 113 in Boombox Size Portable Bluetooth Speakers | #2 of 113 in Boombox Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | 41Hz | 43Hz |
| Maximum SPL | 101dB (measured by Alan Ross Reviews) | 108dB (measured by Alan Ross Reviews) |
| IP Rating | None | IPX7 |
| Power Input | AC Power Cable (2-Prong) | AC Power cord |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 9.3 lbs (4.2 kg) | 12 lbs (5.45 kg) |
| App | Yes (Harman Kardon One app) | Yes (Tribit App) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| EQ | Yes (App EQ) | Yes (10 band) |
| Party Mode | Yes (Auracast) | No |
| USB Playback | No | No |
| Bluetooth Version | 5.3 | 5.3 |
| Battery Life | 8 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| Amplifier Power | 50W RMS | 90W RMS (140W peak) |
| Dimensions | 11.4” x 11.3” x 5.1” (289.2 x 287.5 x 130 mm) | 15.7” x 6.3” x 9.1” (400 x 160 x 230 mm) |
| Drivers | 120mm woofer + 3x 20mm tweeters | 2x ~107mm (4.2”) woofers + 2x ~25mm tweeters |
| Digital Aux Input | No | No |
| Aux Input | No | Yes |
| Strap | No | No |
| Aux Latency | - | 0ms |
| Built-in Microphone | - | No |
| Bluetooth Latency | - | 66ms |
| Power Bank | - | Yes (USB-A) |
| FM Tuner | - | No |
| Microphone Input | - | No |
| MicroSD Playback | - | No |
| Lights | - | Yes |
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