Short answer: the Harman Kardon Onyx Studio 9. It ranks #15 of 89 boombox speakers by sound quality, rated 4.1/5, at $189.99. The Tronsmart Fiitune X30 ranks #48, rated 3.3/5, at $144.90, $45.09 cheaper, not enough of a saving to outweigh the sound-quality gap.
Why pick the Harman Kardon Onyx Studio 9: An elegant 4.2kg living-room portable with a measured 41Hz -10dB bass point, 101dB maximum level, three tweeters, app EQ, stereo pairing and Auracast multi-speaker linking. The tradeoff: It has no water resistance, aux input or USB playback, and its eight-hour claimed battery life is short for an outdoor portable.
What the Tronsmart Fiitune X30 does well: A three-way, six-driver design (racetrack woofer, two midranges, two tweeters and an upward-firing driver) with 80W, Hi-Res certification, LDAC, a claimed 14 hours of battery and IPX6. Watch for: Side by side it clearly lost to the Harman Kardon Go + Play 3, the Soundcore Boom 2 and the EarFun UBoom X: listeners described muddy, dark mid-bass that fails to reproduce low notes, dull and underemphasized treble, and a boxy, sterile sound at low volume next to the JBL Xtreme 4.
Buy the Harman Kardon Onyx Studio 9. It is rated higher for sound quality, and the $45.09 you would save on the Tronsmart Fiitune X30 does not close the gap.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Harman Kardon Onyx Studio 9 | Tronsmart Fiitune X30 | |
|---|---|---|
| Price | $189.99 | $144.90 |
| Ranked | #15 of 89 in Boombox Size Portable Bluetooth Speakers | #48 of 89 in Boombox Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | 41Hz | - |
| Maximum SPL | 101dB (measured by Alan Ross Reviews) | - |
| IP Rating | None | IPX6 |
| Power Input | AC Power Cable (2-Prong) | - |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | - |
| Weight | 9.3 lbs (4.2 kg) | 7.9 lbs (3.6 kg) |
| App | Yes (Harman Kardon One app) | - |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, LDAC |
| EQ | Yes (App EQ) | Yes |
| Party Mode | Yes (Auracast) | - |
| USB Playback | No | - |
| Bluetooth Version | 5.3 | - |
| Battery Life | 8 hours (Manufacturer specified) | 14 hours (Manufacturer specified) |
| Amplifier Power | 50W RMS | 80W |
| Dimensions | 11.4” x 11.3” x 5.1” (289.2 x 287.5 x 130 mm) | 14.6” x 7.7” x 5.1” (370 x 195 x 130 mm) |
| Drivers | 120mm woofer + 3x 20mm tweeters | Racetrack woofer + 2x midrange + 2x tweeters + upward-firing driver |
| Digital Aux Input | No | - |
| Aux Input | No | - |
| Strap | No | No |
Related Speaker Comparisons
How Harman Kardon Onyx Studio 9 compares with other leading options:
- Earfun Uboom X vs Harman Kardon Onyx Studio 9
- Harman Kardon Onyx Studio 9 vs Tribit Stormbox Blast
- Harman Kardon Go + Play 3 vs Harman Kardon Onyx Studio 9
- JBL Partybox Encore 2 vs Harman Kardon Onyx Studio 9
- JBL PartyBox On-The-Go 2 Plus vs Harman Kardon Onyx Studio 9
Prices on this page were last checked September 30, 2026 at 2:57 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 9: $189.99 Amazon eBay
Older models: the Harman Kardon Onyx Studio 8 (ranked higher, rated 4.1/5), the Harman Kardon Onyx Studio 7 (ranked higher, rated 4.1/5), the Harman Kardon Onyx Studio 6 (ranked higher, rated 4.1/5), the Harman Kardon Onyx Studio 5 (ranked lower, rated 3.9/5) and the Harman Kardon Onyx Studio 4 (rated 3.3/5).
Pros: An elegant 4.2kg living-room portable with a measured 41Hz -10dB bass point, 101dB maximum level, three tweeters, app EQ, stereo pairing and Auracast multi-speaker linking. Reviews praise its balanced, smooth presentation and non-fatiguing treble, making it a more music-focused choice than most party speakers. Measured bass extension of 41Hz (-10dB).
Cons: It has no water resistance, aux input or USB playback, and its eight-hour claimed battery life is short for an outdoor portable. Bass is less deep than some earlier Onyx Studio models, while the slightly recessed mids and rolled-off top end mean it is not the most open or detailed option; it still charges from an AC power cable rather than USB-C.
Full Harman Kardon Onyx Studio 9 review and specifications →
| Amplifier Power | 50W RMS |
|---|---|
| App | Yes (Harman Kardon One app) |
| Aux Input | No |
| Bass Extension (-10dB) | 41Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Digital Aux Input | No |
| Dimensions | 11.4” x 11.3” x 5.1” (289.2 x 287.5 x 130 mm) |
| Drivers | 120mm woofer + 3x 20mm tweeters |
| EQ | Yes (App EQ) |
| IP Rating | None |
| Maximum SPL | 101dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Power Input | AC Power Cable (2-Prong) |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| USB Playback | No |
| Weight | 9.3 lbs (4.2 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Harman Kardon Onyx Studio 9 vs Harman Kardon Onyx Studio 7
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- Harman Kardon Onyx Studio 9 vs Zealot ZE41
- Harman Kardon Onyx Studio 9 vs Harman Kardon Onyx Studio 6
- Harman Kardon Onyx Studio 9 vs Zealot ZE21
- Harman Kardon Onyx Studio 9 vs Harman Kardon Onyx Studio 8
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Tronsmart Fiitune X30: $144.90 AliExpress Tronsmart Best Buy eBay
Pros: A three-way, six-driver design (racetrack woofer, two midranges, two tweeters and an upward-firing driver) with 80W, Hi-Res certification, LDAC, a claimed 14 hours of battery and IPX6. It plays loud with a lot of mid-bass, reviewers found good separation of instruments and voices, and some listeners found it warm and full at high volume.
Cons: Side by side it clearly lost to the Harman Kardon Go + Play 3, the Soundcore Boom 2 and the EarFun UBoom X: listeners described muddy, dark mid-bass that fails to reproduce low notes, dull and underemphasized treble, and a boxy, sterile sound at low volume next to the JBL Xtreme 4.
Full Tronsmart Fiitune X30 review and specifications →
| Amplifier Power | 80W |
|---|---|
| Battery Life | 14 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, LDAC |
| Dimensions | 14.6” x 7.7” x 5.1” (370 x 195 x 130 mm) |
| Drivers | Racetrack woofer + 2x midrange + 2x tweeters + upward-firing driver |
| EQ | Yes |
| IP Rating | IPX6 |
| Omnidirectional | No |
| Stereo | Yes |
| Strap | No |
| Weight | 7.9 lbs (3.6 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Jagist reviews: Tronsmart Fiitune X30 Vs Harmon Kardon Go Plus Play 3!!! More from Jagistreviews →
- Dominik Reviews: Tronsmart Fiitune X30 vs HK Go + Play 3 - No chance? - Sound Test More from Dominik Reviews →
- Dominik Reviews: Tronsmart Fiitune X30 vs JBL Xtreme 4 - Complete opposite of eachother? - Sound Test
- Dominik Reviews: Tronsmart Fiitune X30 vs Soundcore BOOM 2 - LETS BOOM! - Sound Test
- Dominik Reviews: Tronsmart Fiitune X30 vs Earfun UBOOM X - BOOMY SOUND! - Sound Test
- Storytripper HD: JBL Xtream 4 vs Tronsmart Fiitune X30 More from storytripperhd →
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